Jin HWs - IT 420 Spring 2011 Homework 1 Won-chul Song 1...

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IT 420 Spring 2011 Homework 1 Won-chul Song 1. Assume a five layer TCP/IP model as shown in the class notes. The initial data at the application layer is 500 bytes. A 20 byte header is added at each of the transport, network, and data link layers. There is a 4 byte trailer added at the data link layer. How many total bytes are sent to the hardware? What percentage of the bytes sent to the hardware is the original application layer data? - 500+20+20+20=560 bytes (60/560)*100 = 10.71% 2. List the layers in the five-layer TCP/IP model and give a brief explanation of each. - Application Layer : This layer defines general available network applications or services the Internet can support. Transport Layer : This layer ensures the reliable data transmission Internet Layer : This layer handles address and routing of the network. Network Interface Layer : This layer is concerned with how user communicates with local network or Ethernet.
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Jin HWs - IT 420 Spring 2011 Homework 1 Won-chul Song 1...

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