America in 1920s Essay Example | Topics and Well Written Essays - 750 words

America in 1920s - Essay Example In the track of World War One, American men tussled to hoard their realm and woman wrestled to triumph the spot on to take part in an election. Near the conclusion of the First World War America was viewed as the mainly influential and affluent state in the world. During the 1920s the United States' cutback was roaring with hit and rising wealth, in which a huge pact of Americans, although surely not everyone, collectively. This epoch was too identified as the 'roaring twenties. By a copious contribute of raw resources (e.g. oil and coal) and the strategy of separation and repression in place; America rapidly becomes yet extra dominant and richer. America had large area variety, with every district contributing a bit diverse to the financial system. Into Metropolis at hand were fine waged career so folks who existed in city profited since the improved salaried work. Beside amid the goal of a state in the 1920's, at hand was as well frustration. America experienced the immense stash market collides that left a lot of Americans impoverished. This dissatisfaction in America was too what directed to the country's misery (Kallen (2002), p. 28). The melancholy instigates in 1929 and final for almost a decade. Millions of individuals lost their occupations beside with lots of industry going broke. The inequity of funds is what shaped such a wobbly economy. The stock market's undertaking a lot poorer than populace attention in this age. This condition leads to the largest stock market hurtle in our account. Cost attained a point that citizens by no means imagined. At one face whilst the market was deafening in September 1929 forty percent of stock market values were clean air. This supposed that financiers thinking that the stock market would set off up since it have been going up. Ku Klux Klan's existence paved the way for extensive fame during the 1920's. The KKK pleased the mainstream of white conventional America of any accountability for the inadequacy of the social order. It as well presented them a sagacity of refuge by shaping a hefty treaty in opposition to minorities (Smith (2002), p. 106). The 1920's where a point in time of conservatism, it was a period of immense communal modification. As of the world of fashion to the world to politics, forces collide to manufacture the mainly volatile decade of the century. The eighteenth Amendment was approved in 1920, which finished alcohol unlawful. It was named the Prohibition Amendment. This was recognized as the "Noble Experiment". All in history contributes to what a country is today and that is what we call contribution to culture, a way of life. The way we are today can be explained of what we experienced from the past. As a consequence, a lot of non-traditional tendency embark on to emerge in the lives of the youthful liberals in the 1920's. Women set in train to sense extra sexually unconventional and comprehend that they also had desires apart from only breathing to house their male equivalent. Many women also obtain up smoking, a commotion beforehand hand over wholly to men. In addition, progressively, women chase careers outside of their homes. The tempo of separation mounted. The young age band had closed living their lives according to customary culture, principles and had slot in their individual sets of needs, ambitions, and principles by which to exist as an alternative. The 1920's has really contributed greatly in the present

Edgar Schein Model Essay Example for Free

Edgar Schein Model Essay The term â€Å"Organization culture† refers to the values and beliefs of an organization. The principles, ideologies as well as policies followed by an organization form its culture. It is the culture of the workplace which decides the way individuals interact with each other and behave with people outside the company. The employees must respect their organization’s culture for them to deliver their level best and enjoy their work. Problems crop up when individuals are unable to adjust to a new work culture and thus feel demotivated and reluctant to perform. Who is Edgar Schein ? Edgar Henry Schein born in 1928 is a renowned professor at the MIT Sloan School of Management who has studied extensively in the field of organization management. Edgar Schein model of organization culture According to Edgar Schein Organizations do not adopt a culture in a single day, instead it is formed in due course of time as the employees go through various changes, adapt to the external environment and solve problems. They gain from their past experiences and start practicing it everyday thus forming the culture of the workplace. The new employees also strive hard to adjust to the new culture and enjoy a stress free life. Schein believed that there are three levels in an organization culture. 1. Artifacts The first level is the characteristics of the organization which can be easily viewed, heard and felt by individuals collectively known as artifacts. The dress code of the employees, office furniture, facilities, behavior of the employees, mission and vision of the organization all come under artifacts and go a long way in deciding the culture of the workplace. Organization A No one in organization A is allowed to dress up casually. Employees respect their superiors and avoid unnecessary disputes. The individuals are very particular about the deadlines and ensure the tasks are accomplished within the stipulated time frame. Organization B The employees can wear whatever they feel like. Individuals in organization B are least bothered about work and spend their  maximum time loitering and gossiping around. The employees use derogatory remarks at the work place and pull each other into controversies. In the above case, employees in organization A wear dresses that exude professionalism and strictly follow the policies of the organization. On the other hand, employees in organization B have a laid back attitude and do not take their work seriously. Organization A follows a strict professional culture whereas Organization B follows a weak culture where the employees do not accept the things willingly. 2. Values The next level according to Schein which constitute the organization culture is the values of the employees. The values of the individuals working in the organization play an important role in deciding the organization culture. The thought process and attitude of employees have deep impact on the culture of any particular organization. What people actually think matters a lot for the organization? The mindset of the individual associated with any particular organization influences the culture of the workplace. 3. Assumed Values The third level is the assumed values of the employees which can’t be measured but do make a difference to the culture of the organization. There are certain beliefs and facts which stay hidden but do affect the culture of the organization. The inner aspects of human nature come under the third level of organization culture. Organizations where female workers dominate their male counterparts do not believe in late sittings as females are not very comfortable with such kind of culture. Male employees on the other hand would be more aggressive and would not have any problems with late sittings. The organizations follow certain practices which are not discussed often but understood on their own. Such rules form the third level of the organization culture.

Database :: essays research papers

The Database   Ã‚  Ã‚  Ã‚  Ã‚  Databases are becoming as common in the workplace as the stapler. Businesses use databases to keep track of payroll, vacations, inventory, and a multitude of other taske of which are to vast to mention here. Basically businesses use databases anytime a large amount of data must be stored in such a manor that it can easily be searched, categorized and recalled in different means that can be easily read and understood by the end user. Databases are used extensively where I work. In fact, since Hyperion Solutions is a database and financial intelligence software developing company we produce one. To keep the material within scope I shall narrow the use of databases down to what we use just in the Orlando office of Hyperion Solutions alone.   Ã‚  Ã‚  Ã‚  Ã‚  In the Orlando office we have three main databases. We have a Microsoft Access Database, a Visual Source Safe database, and a Microsoft SQL server database with a custom web client front end. The Microsoft Access database is fairly simple. We use this data base to keep track of the computer hardware and software configurations that are used when doing quality assurance testing and problem replication and troubleshooting of the software product. For any one product we can have up to twenty or thirty different configurations. Initially keeping track of the configurations along with the machine name and IP address was done on paper with a grid like matrix. After a short period of time, this became extremely time consuming and impractical. A simple database was set up in Access and then the database was shared to allow each user to be able to find out what configuration each computer was in for that day or that week so that the proper tests and or bug reporting could be conducted. The database allows the users to search by software version, platform type, operating system, machine name, IP address, memory size, and several other items that are not as significant. Before the database was created the engineer would have to leave their desk find the chart and to a cross reference using the matrix that was drawn up, and hopefully that matrix was kept up to date. Now as the technicians update or change the machine configurations they can enter that information immediately into the database and it will automatically provide a matrix view or a tabular view for any engineer who needs it.

Vitro Corning

Identify and discuss Corning's strategic predisposition toward a joint venture with Vitro. Because of long histories of successful joint ventures and had been an innovative leader in foreign alliances for over 73 years, Corning's strategy of establishing the joint venture relationship with Vitro seems to be a ideal combination and will lead to success. However, the joint venture became subject to a series of cultural and other conflicts that began to undermine this vision. According to company officials and external analysts, cultural differences were a principal cause of the alliance's failure. Therefore, lack of fully understanding Mexico culture is the key predisposition of Corning's strategy. What is culture? One of the well-accepted definitions is given by Goodenough (1971), who has defined culture as a set of beliefs or standards, shared by a group of people, which help the individual decide what is, what can be, how to feel, what to do and how to go about doing it. The main cultural clashes between two companies are discussed as follow: Different decision-making style between Mexican and American: Vitro and other Mexican businesses are much more hierarchical, with loyalty to fathers and patrons somehow carried over to the modern corporation. As a matter of loyalty or tradition, decisions are often left either to a member of the controlling family or to top executives, while middle level managers are often not asked their opinions. As a result, Corning managers who work in the joint venture were sometimes left waiting for important decisions about marketing and sales. Refers to a Corning executive: â€Å"If we were looking at a distribution decision, or a customer decision, we typically would have a group of people in a room, they would do an assessment, figure alternatives and make a decision, and I as chief executive would never know about it. † My experience on the Mexican side is that someone in the organization would have a solution in mind, but then the decision had to be kicked up a few levels. ‘ Different working efficiency: The Mexicans sometimes saw the Americans as too direct, while Vitro managers, in their dogged pursuit of politeness, sometimes seemed to the Americans unwilling to acknowledge problems and faults. The Mexicans sometimes thought Corning moved too fast; the Americans felt Vitro was too slow. Other difference in culture: America is a advanced country in modern society with only 227 years history, traditional culture has far less important position than fashion in most Americans' mind, contrarily, traditional culture plays a significant role in Mexico, most Mexican are conservative even in large companies. For instance, Corning's offices in upstate New York are in a modern glass enclosed building, while Vitro's headquarters in Monterrey, often thought of as Mexico's Pittsburgh, are in a replica of a 16th century convent, with artwork, arched ceilings and antique reproductions. To sum up, attitudes, orientations, emotions, and expressions differ strongly among people from American or Mexican. These differences are fundamentally cultural. According to Hofstede's culture dimensions, we can get the conclusion as the table demonstrated below: As shown in the table, although culture of both countries has masculinity characters, there is still a large culture gap in other aspects between American and Mexican. Therefore, without fully understanding Mexico's culture leads to the failure of Corning's alliance strategy with Vitro. Cultural clashes among partners in joint ventures are not a new issue. Discuss why an MNC, and specifically Corning, would be interested in fully understanding the culture of a potential before deciding on an alliance. Culture clash – the cultures of the companies are not compatible and compete for dominance. The businesses of both companies suffer while attention is diverted to the contest and it may destroy the key element of prior success. (Jeff Jacobs 2001) Although there is evidence of increasing cultural convergence between countries around the world, cultural differences among countries will persist. It is widely recognized that cultural differences between the partners of a merger are one of the most common reasons for failure in mergers, this may happen during pre-merger negotiations or during post-merger integration. Thus, fully understanding the culture of a potential can help managers anticipate problems in negotiating mergers and prevent them from disrupting what can be an attractive and mutually beneficial market entry strategy. In this case, as an innovative leader in foreign alliances, Corning has formed approximately 50 ventures over the years. Only 9 had failed (dissolved), an impressive number considering one recent study found that over one-half of foreign and national alliances do not succeed. With this proud record, Corning was confident of being succeed in the joint venture of Vitro, however, the joint venture became subject to a series of cultural and other conflicts that began to undermine this vision. Culture is about shared assumption, beliefs, values and norms. Each organization has its own culture developed from its own particular experience, its own role and the way its owners or managers get things done (Hellard, 1995). Since culture may affect the MNC in many aspect of its international development, even like Corning, which has rich foreign alliance experience, cannot ignore the effect cause by culture clash. It is unalterable principle for Corning to fully understanding the culture of its partner before it decides on an alliance. International alliances are an ideal setting within which to explore cultural differences in negotiations because they involve not only up-front negotiations over the initial structure of the relationship, but also constant and ongoing negotiation to manage what can be an inherently unstable and continuously evolving organizational form. If Corning and Vitro still want to remain in the alliance, understanding and accepting the other part's culture is the precondition. According to there is large culture gap between America and Mexico, how to narrow this gap or create an agreement of new value concept is the possible solution. The specific method advised as follow: 1. Managers from USA and Mexico who will work together in the alliance should meet and negotiate the detail of establishing the new company in each country before they carrying out the merging plan. 2. Employees from both companies should learn about how to minimize the breakage of culture clash. There should be a particular training for the employees who will work together in the new merger. The skills to overcome an embarrass situation are indispensable for them. 3. In order to get used to working in a new environment with different culture, Corning and Vitro can implement a manager-exchange program before new company established. Managers participated in the program will be assigned to the partner country and pursuit as probation period for the purpose of experiencing the local culture. 4. After new company established, localization is a important key to keep it operating properly and performing well, which mean among employees of the new company, local residents should have larger proportion. In addition, the final decision of the new company should be made by the local manager, and manager from the other part just take the responsibility of supervision and report the current operating situation to parent company. 5. In the early days of the alliance, executives from both companies should gather frequently to summarize the new company's performance of the previous period, exchange the information they collect from the operation of local company. Till the new companies enter into the right path, they can meet quarterly for further strategies. Discuss why both companies would continue to distribute each other's product after the joint venture failed. What impact might the public statements about the failure have on the relationship? Both Corning and Vitro remain in the situation of distributing each other's product even after the joint venture failed. The main reason is they still can make profit from counterparts' market. We can understand it easier from the first purpose of why Corning enters into joint venture: to gain access to markets that it cannot penetrate quickly enough to obtain a competitive advantage. In addition, both companies were globally oriented, and both had founding families still at their centers, Corning specialized in cookware and Vitro in tableware. Corning was accomplished at melting glass, while Vitro was expert in molding it. The companies intended to combine product lines based on where each company had technical leadership, and they began to swap technology to enhance their respective capabilities. Even though the alliance had been failed, both of them still can get competitive advantages from each other. Furthermore, if the culture clash problem can be solved or minimized, they still have opportunity to merge. Someone might consider the impact of public statement on the failure of their partnership negative. In fact, it might be a good thing; there is a famous saying in China: a loss may turn out to be a gain, a blessing in disguise. As we know, no company's development is plain sailing on their way to success, frustration is inescapable, what can you learn from the frustration is more important. In this case, the joint venture dissolved illustrate there is a culture gap between both companies, but not the quality of products or managing skills and something else. The failure can provide a clear orientation to Corning and Vitro's further positioning, once they can acknowledge and face bravely to the failure, and analyze the reason lead to the failure, the rare experience they gain is much larger than they lost. In future operation, they will consider more cautiously and more comprehensively before they decide to establish a new joint venture. Certainly, culture clash factors included. Reference: Goodenough, Ward H. , 1971, Culture language and society , modular publications, 7, Addison- Wesley: Reading MA Hellard, R. B. (1995), Project Partnering: Principle and Practice Hofstede, G. 2001). Culture's consequences: Comparing values, behaviors, institutions and organizations across nations (2nd ed. ). Jackson, T, (ed), (1995). Cross-Cultural Management, Jeff Jacobs. (2001). How Culture Affects Mergers and Acquisitions X. Zhang, Y. Wang, J. Wrathall & M. Berrell, 2002, International Management–Managing in the Era of Globalization, P eople's University Press, China Available: http://www62. homepage. villanova. edu/jonathan. doh/CORNINGcase. rev. doc Available: http://www-edocs. unimaas. nl/files/mer95011. pdf ;/pre;;/body;;/html;

Routing Protocol

1. INTRODUCTION 1. 1 What  is Computer Network? The group  of  computers and devices linked by communication channels allowing users to share information, data, software and hardware with further users is meant to be computer network. Network protocols bound hardware as well as software components of network. Two or more  computers are said  to be  in  a network if and only if they are connected  mutually  and  are  able  to commune. Computers are connected to a network by the use of all  the ports i. e. , parallel ports, modem ports, Ethernet ports, serial ports, USB ports  , fire wire ports and many more in one or more way. But Ethernet port is the most broadly used ports  for networking. Hosts, end stations or workstations are referred while talking  about networks. Anything  attached  to  the network  including hubs, bridges, switches, routers,  access points, firewalls, workstations, servers, mainframes, printers, scanners, copiers, fax machines  and more are included under Host or end stations . Computers are connected in a network for sharing of software and hardware resources, information and data as well as smooth the progress of communication. 1. 2 TCP/IP Layered  architecture Fig: TCP/IP Layered  architecture The following  are  the layers  of  the TCP/IP  architecture: Application Layer: In the  application layer Simple Mail Transfer Protocol (SMTP) and File Transfer Protocol (FTP) uses protocol  for network communication. Application layer protocols  are most  frequently  linked with client-server  applications. Transport Layer: End-to-end message transfer capability, flow control, error control and fragmentation etc are provided  by the transport layer. The transport layer ensures source to destination delivery of packets safely and reliably. The service through which applications are connected  together via  the use  of ports is provided by transport layer. Network Layer: Packets are logically transmitted over  the entire network in the OSI’s Network layer. Hosts addressing by assigning  them  an IP  address  and packet routing among multiple networks are handled in this layer. This layer is concerned with routing data; end to end message delivery etc. Interface Layer: The data exchange between  the host  and  the network are monitored by the  interface layer. The protocols for  physical transmission  of data is defined by Interface Layer . 1. 3  Autonomous System IP networks  and routers collection under  the control  of one entity representing a common routing policy is called an  Autonomous System. Each  AS  have a unique  AS number  for use  in routing. Each network is uniquely identified on  the  internet by ASN. IANA (Internet  assigned Numbers  authority) assign AS numbers  and supply  to Regional  internet Registries (RIRs)  in blocks. Autonomous System can be divided  into three categories: Multihomed  Autonomous System:   Connections  to more than one  AS is maintained by a Multihomed  AS. Stub  autonomous System:   Connection  to only one other  AS is Stub  autonomous System. Transit  autonomous System:  Connections through itself  to separate networks are provided by Transit  autonomous System. 1. 4 Routing The method  of selecting paths  in  a network via which  to send data is meant to be routing. The process  of finding  a pathway from  a sender  to  a desired destination is also said to be routing. The telephone network,  the  internet  and transport networks, etc perform routing. Network Layer  of either TCP/IP layered model or  the OSI (Open System  interconnect) Reference model mainly carry out routing. The logically  addressed packets are passed from  their source  to destination via  intermediary nodes i. e. orwarding is directed by routing. Routing tasks are performed by routers. Routing and packet forwarding is performed by ordinary  computers available with multiple network cards in a limited manner. Forwarding is directed by the routing process on  the basis  of routing tables where routing record to different network destinations are maintained. In order to have efficient routing, construction of routing table held  in  the routers' memory is most necessary thing. Only one network path are frequently used by routing  algorithms   at  a time, but  the use  of multiple  alternative paths is made possible by multi-path routing techniques. Following are the types  of routing delivery semantics: Unicast: A message is delivered to  a single specified node by router. Fig: Unicasting Broadcast:   A message is delivered  to  all nodes  in  the network by router. Fig: Broadcasting Multicast:   A message is delivered  to assembly  of nodes that have expressed  interest  in getting  the message by router. Fig: Multicasting Anycast: A message is delivered  to  any one out  of  a set  of nodes, typically  the one next  to  the source. Fig:  anycasting 2. TYPES  OF ROUTING Following are the types  of Routing mechanisms. They  are: Static Routing Dynamic Routing 2. Static Routing: The process  by which routes can be manually entered into the routing table with the help of a configuration file which loads automatically as soon as router starts is called static routing. Network  administrator, who configures the routes, can enter these routes as an option. Thus ‘static' rou tes mean the routes that cannot be changed (except  a person changes  them)   after their configuration. The simplest  type  of routing is static routing. In case of change of routing information often or configuration on a huge number of routing devices (router) it doesn’t work fine as it is a manual process. The outages or down connections are not handled properly by static routing because  manually configured route must be reconfigured physically in order  to fix or renovate  any lost connectivity. 2. 2 Dynamic Routing: Network destinations are discovered dynamically  by means of software  applications called Dynamic routing protocols. A routing table is created and managed by router  in Dynamic Routing. Firstly, a router will ‘learn' routes  to  the directly connected entire networks. It will  then learn routes from other routers using the same routing protocol. One or more best routes are selected from the list of routes for each and every network destination by router. ‘Best route'  information are distributed  to other routers running  the same routing protocol by Dynamic protocols, distributing  the  information on what networks it subsist  and can be reached. This provide dynamic routing protocols  the  capability  to  get used to logical network  topology changes, equipment failures or network outages ‘on  the fly'. 2. 3 Types  of Dynamic Routing Distance-Vector Routing Paths are calculated using Bellman Ford Algorithm by  a distance-vector routing protocol. RIPv1  and 2  and IGRP (Interior Gateway Routing Protocol) are examples  of distance-vector routing protocols. Earlier, distance vector protocols such as RIPv1 show classful behavior but newer distance vector protocols such  as RIPv2  and Enhanced  interior Gateway Routing Protocol (EIGRP) show signs of classless behavior. Distance-vector routing protocols †¢ Easy  and competent  in small networks †¢ Deprived convergence properties †¢ Facilitate in  the growth  of more complex but more scalable link-state routing protocols  for use  in large networks. Periodic copies  of  a routing table are passed from router  to router by distance vector routing  algorithms. †¢ Logical broadcast is the most commonly used  addressing scheme. Periodic updates are sent by routers running  a distance vector routing protocol even if  there  are no changes  in  the network. †¢ Complete routing table is included under  the periodic rou ting update in a pure distance vector environment. †¢ All known routes can be verified and changes can be made  by getting  a neighbor’s complete routing table based on simplified  information also called as â€Å"routing by rumor†. Fig: Distance Vector Routing Periodic routing updates are received from router A to router B in  the figure. Distance vector metric (such  as hop count) are added by Router B to each route learned from router A,  rising  the distance vector. Its own routing tables  are passed to its neighbor, router C. This process occurs  between directly connected neighbor routers in  all directions. The chief purpose  is  to decide  the top route  to  contain  in  the table when the routing table is updated by  a routing protocol  algorithm. Different routing metric is used to determine  the best route by each distance vector routing protocol. Metric value  is generated for each path through network by the  algorithm. Usually, the path is better if metric is smaller. Single characteristic  of  a path helps in calculation of metrics and combination of several path characteristics helps in calculation of more complex metrics. The most commonly used  metrics used by distance vector routing protocols are: Hop Count: Packet’s number  of passages throughout  the output port  of one router Bandwidth: Link’s data capacity Delay: Time necessary  to shift  a packet from starting place  to destination. Load: work load on  router or link. Reliability: each network link  bit error rate Maximum Transmission Unit (MTU):  the utmost message extent  in octets satisfactory  to  all links on  the path. Link-State Routing Packet-switched networks use link-state routing protocol  for computer communications. OSPF  and  IS-IS are its examples. A  topological database is built by the help of link-state routing that describes extra  precise  inter-network routes. Large networks use link state routing protocols and now used by most of the organization and ISP. Router performs the link-state protocol in  the network. A map  of  the connectivity  of  the network is constructed by every node in the form of graph showing node connection to other node is the basic concept  of link-state routing. The best next hop is calculated by each node  independently for every possible destination  in  the network. The routing table for the node is formed by  the collection  of best next hops. Fig: Link-State Routing To find out  the shortest path from itself  to every other node  in  the network an  algorithm is run by each node  independently over  the map. OSPF, EIGRP and Novell's NLSP (NetWare Link State Protocol) are the examples of link state routing protocol. IPX is only supported by Novell's NLSP. A partial map  of  the network is maintained by each router in this type  of routing protocol. Link state  advertisement (LSA)  is flooded throughout  the network when  a network link changes state (up  to down, or vice versa). The changes are noted and routes are re-computed by all  the routers  accordingly. Greater flexibility  and sophistication are provided by Link State Routing protocols than  the Distance Vector routing protocols. Overall broadcast traffic is reduced  and better decisions are made  about routing by taking characteristics such  as bandwidth, delay, reliability,  and load  into consideration,  instead  of taking  their decisions only on hop count. 3. ROUTING  ALGORITHMS 3. 1 Bellman-Ford  Algorithm: †¢ Also called as Label Correcting  algorithm †¢ Used for negative edge weight †¢ Same as Dijkstra's  algorithm †¢ In order to maintain distance tables, this algorithm is used by router †¢ Exchanging  information with  the neighboring nodes help to update information in the distance table †¢ All nodes  in the network is represented by the number  of data  in  the table The directly  attached neighbors are represented by the columns  of table and all destinations  in  the network are represented by the row. †¢ The number  of hops, latency,  the number  of outgoing packets, etc. are measurements in this algorithm. 3. 2 Dijkstra’s  Algorithm: †¢ Edsger Dijkstra  conceived Dijkstra's  algorithm †¢ Mostly used for routing †¢ Is a graph search algorithm †¢ The single-source shortest path problem  for  a graph is solved by this algorithm with non negative edge path costs †¢ The shortest path tree is produced as a output †¢ Helps in finding shortest route from one router to other A shortest-path spanning tree having route to all possible destination  is built by this algorithm for router †¢ The router using  the  algorithm  is  the source  of its shortest-path spanning tree 4. ROUTING PROTOCOLS Routing protocol describe the way of communication between routers which helps in the selection of routes between any two nodes on a network. Usually, knowledge of immediate neighbors is known by each router. This  information is shared by  a routing protocol to have routers the knowledge  of  the network  topology. Most commonly used Rout ing protocols are as follows: 4. RIP (Routing  information Protocol) †¢ dynamic  inter-network routing protocol †¢ used in private network †¢ routes are automatically discovered †¢ routing tables are built †¢ a Distance-Vector routing protocol †¢ uses Bellman-Ford  algorithm †¢ 15 hops are  allowed with RIP †¢ 180 sec is the hold down time †¢ Full updates are transmitted every 30 sec by each RIP router †¢ Works at network layer †¢ Prevent routing loops †¢ Hop limit †¢ incorrect routing  information are prevented from being propagated †¢ easy configuration †¢ no parameter required Two versions  of RIP are as follows: RIPv1: †¢ classful routing is used subnet information is not carried by periodic routing updates †¢ no support for VLSM (variable length subnet masks) †¢ Same network class have different sized subnet by the use of RIPv1 †¢ No router authentication †¢ Broadcast based and 15 is the maximum hop count A RIPv1 packet  format  is shown below: [pic]Fig: RIP packet  format Command:  determine whether  the packet  is  a request or  a response. A router send  all or part  of its routing table is asked by  the request. Reply  to  a request or regular routing update means the response. Routing table entries are contained in responses. Version number: RIP version used is specified. Potentially  incompatible versions can be signaled by this field. Zero: RFC 1058 RIP doesn’t use this field; it was  added to have backward compatibility provided to pre-standard varieties  of RIP. Address family identifier (AFI):   The  address family used is specified. Address-family identifier is contained in  each entry  to  specify  the category  of  address being particularized. The  AFI  for IP  is 2. Address:   The IP  address is particularized  for  the entry. Metric:  The number of inter-network hops traversed  in  the trip  to  the destination is indicated. 1  and 15  for  an applicable route, or 16  for  an unapproachable route. RIPv2: Developed  in 1994 †¢ Classless  inter-Domain Routing (CIDR) is supported †¢ Subnet  information can be carried †¢ Addition of MD5  authentication and Rudimentary plain text  authentication for the security of routing updates. †¢ Routing updates   are multicast to 224. 0. 0. 9 †¢ 15 is the maximum hop count A RIPv2 packet  format is shown below: [pic] Fig: RIPv2 packet  format Command:  determine whether  the packet  is  a request or  a response. A router send  all or part  of its routing table is asked by  the request. Reply  to  a request or regular routing update means the response. Routing table entries are contained in responses. Version number: RIP version used is specified. Unused: Zero is the value set. Address-family identifier (AFI):  The  address family used is specified. Authentication  information is contained in the remainder of the entry if  the  AFI  for  the initial entry  is 0xFFFF in  the message. At present,  simple password is the only  authentication type. Route tag: The methodology is provided  for distinguishing between  internal routes (learned by RIP)  and external routes (learned from other protocols). IP  address: IP  address is particularized  for  the entry. Subnet mask:  The subnet mask is contained  for  the entry. No subnet mask has been particularized  for  the entry if this field  is zero. Next hop: The IP  address  of  the next hop is indicated  to which packets  for  the entry should be  forwarded. Metric:  The number of inter-network hops traversed  in  the trip  to  the destination is indicated. 1  and 15  for  an applicable route, or 16  for  an unapproachable route. 4. 2 OSPF (Open Shortest Path First) †¢ A Link-State protocol †¢ used  for routing between routers belonging  to  a single  autonomous system †¢ link-state technology is used †¢   information  about  the direct connections  and links is communicated between the routers Identical database is maintained by each OSPF router for the description of   the  autonomous System’s  topology †¢ Calculation of a routing table by the construction of a shortest- path tree from this database. †¢ Routes are quickly recalculated in the face of topological changes †¢ equal-cost multi-path are supported †¢ Authentication of all OSPF routing protocol exchanges †¢ Designed for TCP/IP environment †¢ routing updates authentication †¢ IP multicast are utilized in sending/receiving  the updates †¢ routes IP packets based exclusively on  the target IP  address originate  in  the IP packet header Grouping of sets of networks †¢ IP subnets are flexibly configured †¢ Destination  and mask is available to the route distributed by OSPF The following figure shows  the packet  format used by OSPF: [pic]Fig: OSPF packet  format Version number:  the OSPF version used is specified. Type:  the OSPF packet type is identified  as one  of  the following: Hello: neighbor relationships are established and maintained. Database description:  the contents  of  the  topological database are described. Link-state request: pieces  of  the  topological database are request ed from neighbor routers. Link-state update:  a link-state request packet is responded. Link-state  acknowledgment:   link-state update packets are acknowledged. Packet length:  the packet length,  the OSPF header is specified. Router ID:   the source  of  the packet is identified. Area ID:   The  area of packet is identified. All OSPF packets  are  linked with  a single  area. Checksum:  the complete packet contents are checked  for  any harm suffered  in travel. Authentication type:  the  authentication type is contained. Authentication of  all OSPF protocol exchanges. Configuration of the  authentication type   on per-area basis. Authentication:   authentication  information is contained. Data: encapsulated upper-layer  information is contained. 5. WORKING 5. 1 Distance Vector Routing: The following methods show  the overall working  of  the Distance-Vector Routing: . There is no predefined route i. e. entire route for a particular destination is not known to any router. The port to send out a unicast packet is known by each router on the basis of destination address. Progressively the route is made and there is the formation of the route by the contribution of each router when it receives the packet. The optimal tree is not predefined in DVRP actually. No routers have knowledge for making an optimal tree. Slowly and gradually the tree is made. The tree is formed as soon as a router receives a packet; it is forwarded by router through some of the ports, on the basis of source address. Other down-stream routers make the rest of the tree. The formation of the loops must be prevented by this protocol. Duplications are also prevented in order to make the entire network receive only one copy. In addition to this, the shortest path from source to the destination is the path travelled by a copy. Inconsistencies occurring with Distance-Vector Routing: Incorrect routing entries are caused by slow  inter-network convergence which may bring inconsistencies maintaining routing information. .  The following example describes how  inconsistencies occur  in Distance-Vector routing: The entire figure describes the inconsistencies occurring with Distance-Vector Routing. Defining  a maximum  to prevent count  to  infinity: . With this  approach,  the routing table update loop is permitted by routing protocol until  the metric exceeds its maximum  allowed value. Fig: Defining  a maximum  to prevent count  to  infinity 6 hops are defined as the maximum  allowed value. When  the metric value exceeds 16 hops, we cannot reach network 10. 4. 0. 0 Routing Loops  in Distance-Vector Routing: A routing loop is said to be occurred if two or more routers have  false routing  information  representing that  a applicable path  to  an unapproachable d estination exists via other routers. Fig: Routing Loop Solutions  to eliminate routing loops Split horizon:  The information is not sent in the direction from where original information comes. The split horizon function is illustrated by the following figure Fig: Split Horizon Route Poisoning:  Routing loops are eliminated. The following figure provides  an example  of Route Poisoning: Fig: Route Poisoning In  addition  to split horizon, route poisoning  and holddown timers, poison reverse, holddown timers  and triggered updates  are other methods  to eliminate routing loops. 5. 2 Link-State Routing: The following methods show  the overall working  of Link-State Routing. Gathering of the neighbor  information continuously. Router answering to this protocol are broadcasted the list of neighbor  information, process known  as flooding. Soon, this  information is distributed to all routers on  the network. Flooding of the neighbor  information in case  of  a (routing-significant) change  in  the network. The best path can be calculated to any host on any destination network as everything  about  the network is known by every router. 6. ADVANTAGES  AND DISADVANTAGES Distance-Vector Routing Advantages  of Distance-Vector Routing: †¢ simple  and flat network †¢ No special hierarchical design is required. †¢ Implementation of hub-and-spoke networks †¢ No concern for worst-case convergence times  in  a network †¢ less memory  and processing power usage Disadvantages  of Distance-Vector Routing: †¢ Incorrect routing entries create inconsistencies in maintaining  the routing  information †¢ Rise of a condition count  to  infinity †¢ Occurrence of a routing loop †¢ Variable Length Subnet Masking (VLSM) or super netting is not supported †¢ multi-vendor routing environment is not supported Link-State Routing Advantages  of Link-State Routing: †¢ Paths are chosen via network by the use of cost metrics †¢ changes  in  the network  topology are reported to  all routers  in  the network quickly †¢   fast convergence times †¢ No occurrence of routing loops routing decisions are based on the most recent set  of  information †¢ Link-State protocols use cost metrics  to choose paths though  the network. The cost metric reflects  the capacity  of  the links on those paths. Disadvantages  of Link-State Routing: †¢ Topology database,  an  adjacency database,  and  a  forwarding database is required. †¢ a significant  amount  of memory  is required in large or complex networks †¢ significant  amount  of CPU power usage †¢ need of a strict hierarchical network design to reduce significant  amount  of CPU power usage †¢ network capability or performance is low to transport data . APPLICATION  AREAS Distance-Vector Routing: †¢ used in mobile, wireless and hoc networks (MANETs) †¢ used for mobile  ad hoc routing (Ad hoc On-Demand Distance Vector Routing) . Link-State Routing: †¢ used  in larger, more complicated networks †¢ Optimized Link State Routing Protocol (OLSR) designed for mobile, wireless and hoc networks 8. COMPARING DISTANCE-VECTOR  AND LINK-STATE ROUTING STRATEGIES †¢ Mostly, best path is determined by Distance Vector protocols, while bandwidth, delay, reliability  and load are considered to make routing decision by Link-State protocols Distance Vector protocols are simple and efficient where as Link-State protocols are flexible and sophisticated †¢ Routing  information Protocol (RIP v1  and v2)  and  interior Gateway Routing Protocol (IGRP developed by Cisco) are Distance Vector protocols where as OSPF, EIGRP, Novell's NLSP (NetWare Link State Protocol) are Link-State protocols †¢ Notion of a distance is not required in Distance Vector routing where as Link-State routing is based on minimizing some notion of distance †¢ Uniform policies are not required at all routers in Distance Vector routing but uniform policy is required in Link-State routing Router have little knowledge about network topology in Distance Vector routing where as routing domain has excessive knowledge about topology information in Link-State routing 9. CONCLUSION Introduction, working, use, advantages and disadvantages of Distance-Vector  and Link-State routing  are explained  in this project. Bellman  ford  and Dijkstr a’s  algorithm are also discussed. This project describes the popularity of Distance-Vector  and Link-State routing  because of their complex, sophisticated, flexible features in recent computer networking field..

Integrated Marketing Communications-How Brands are Built Essays

Integrated Marketing Communications-How Brands are Built Essays Integrated Marketing Communications-How Brands are Built Essay Integrated Marketing Communications-How Brands are Built Essay How Brands are built Part I. Proposal: General Motors Company History General Motors (GM) is an international automotive company located in Michigan, in the United States of America. The growth of General Motors throughout the 19th century was spurred by the numerous buyouts of Oldsmobile, Cadillac and Pontiac among other firms. The scope of General Motors extends up to 157 countries worldwide with a work force totaling up to about 200, 000 in number(General Motors Company, 2012). Currently, it is the world’s largest automaker in terms of the number of units sold. The Company has its listings on the New York Stock Exchange (NYSE), where it is listed as (NYSE: GM), and on the Toronto Stock Exchange (TSX), where it is listed as (TSX: GMM). Apart from operations in America, General Motors also has joint ventures with Chinese firms (General Motors Company, 2012). Brand identity and relationships General Motors posses a very strong brand image and a similarly strong brand identity. GMs brand identity before the 2007 restructuring was not focused on competing with other rival technological advancements. The new identity, however, focused on bringing out newer models that are more eco-friendly such as the Chevrolet Cruze. In terms of brand relationship, General Motors have stuck to their logo and marketing images for close to a century (General Motors Company, 2012). This standard has been duplicated worldwide in all its branches. Therefore, GM has maintained a good brand relationship with its customers. The very existence of the same logo since 1908 evokes particular emotions among car owners and potential buyers (General Motors Company, 2012).

Prohibition1 essays

Prohibition1 essays As under a spell, the people had suffered this act to be brought to its fatal conclusion, but with the first touch of cold reality the charm was undone, and the law appeared in its true aspect. Brought about by the Eighteenth Amendment and enforced through the Volstead Act, lasted for over a decade. Despite a growing lack of public support for both Prohibition and restraint itself, the ban on alcohol continued throughout the United States-at least in the law books. In practice, however, National Prohibition was much less effective than restraint and Prohibition leaders had hoped, in the end causing more problems than it solved. Once passed, Prohibition directly led to the increase in crime and corruption during the twenties, the public health problems associated with bootleg liquor and alcohol substitutes, the irritated tensions between religious, racial, and social groups, and the political disturbance in response to its existence. Yet in the end, it was the discussion of the supre me public hatred of the Amendment, caused by all of these factors combined, which brought about Prohibitions repeal. Yet Prohibition did enjoy some success. Records reveal that alcohol consumption did initially drop after the onset of National Prohibition and the Volstead Act. However, this decrease on a national level was not all that significant compared to the effect of previous temperance measures in specific communities. Also, after this initial drop alcohol consumption continued to rise steadily throughout Prohibition to the point where it was thought consumption would actually surpass pre-Prohibition levels. The same was true of alcohol related diseases-while initially declining, alcoholism and alcohol-related illness climbed to new heights, all while Prohibition was still in effect (Thornton, Failure 7071). Thus, in the long run, the initial success of Prohibition was soon reversed. Crime, however, was a problem thro...