Chapter 2 Case Study

Joshua Clegg

Chapter 2 case projects

Case Project 2-1

You are a networking professional who works in a college computer lab. The computers run only the TCP/IP protocol on an Ethernet network, and all computers use 3Com NICs. Many beginning computer science students use this lab for home- work; you help them access the network and troubleshoot problems with their connections on a daily basis. One day, a student begins tampering with his computer; when he restarts the computer, it alerts him that it can’t find the network. He calls you over to help. You ensure all the physical connections are sound. Then, you check the workstation’s network properties and find that he has changed the frame type that his NIC uses to transmit data from Ethernet to token ring.

1. Explain why this has prevented the workstation from connecting to the network.

The token ring relies on a direct link between nodes. Ethernet frames are different and the two will not interact with each other over a network.

Case Project 2-2

The same student is curious about how a Web site appears on his computer screen. On a separate piece of paper, draw and explain the process that occurs between a client and a server when requesting a Web page, using the OSI model as a reference. For example, what Application layer protocol is required? How will the process differ if the student is sending or retrieving information to or from a secure Web site? Explain to the student how each OSI model layer contributes to data arriving in the correct place without errors.

1. Drawing attached.

When tying a website such as www.google.com into your browser it uses its API or Application Program Interface to transfer your request to the application layer protocol called HTTP or Hypertext Transfer Protocol to format and send your browsers request to the server.

Then the data goes to the presentation layer which is kind of a translator it makes sure that one application type and host can understand...