Lab_04_5_2_1 - Lab 4.5.2: TCP/IP Transport Layer Protocols,...

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Lab 4.5.2: TCP/IP Transport Layer Protocols, TCP and UDP Topology Diagram All contents are Copyright © 1992–2007 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 1 of 10
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CCNA Exploration Network Fundamentals: OSI Transport Layer Lab 4.5.2: TCP/IP Transport Layer Protocols, TCP and UDP Addressing Table Device Interface IP Address Subnet Mask Default Gateway R1-ISP S0/0/0 10.10.10.6 255.255.255.252 N/A Fa0/0 192.168.254.253 255.255.255.0 N/A R2-Central S0/0/0 10.10.10.5 255.255.255.252 N/A Fa0/0 172.16.255.254 255.255.0.0 N/A Eagle Server N/A 192.168.254.254 255.255.255.0 192.168.254.253 N/A 172.31.24.254 255.255.255.0 N/A host Pod# A N/A 172.16. Pod#. 1 255.255.0.0 172.16.255.254 host Pod# B N/A 172.16. Pod#. 2 255.255.0.0 172.16.255.254 S1-Central N/A 172.16.254.1 255.255.0.0 172.16.255.254 Learning Objectives Identify TCP header fields and operation using a Wireshark FTP session capture. Identify UDP header fields and operation using a Wireshark TFTP session capture. Background The two protocols in the TCP/IP Transport Layer are the transmission control protocol (TCP), defined in RFC 761, January, 1980, and user datagram protocol (UDP), defined in RFC 768, August, 1980. Both protocols support upper-layer protocol communication. For example, TCP is used to provide Transport Layer support for the HTTP and FTP protocols, among others. UDP provides Transport Layer support for domain name services (DNS) and trivial file transfer protocol (TFTP), among others. The ability to understand the parts of the TCP and UDP headers and operation are a critical skill for network engineers. Scenario Using Wireshark capture, analyze TCP and UDP protocol header fields for file transfers between the host computer and Eagle Server. If Wireshark has not been loaded on the host pod computer, it may be downloaded from URL ftp://eagle- server.example.com/pub/eagle_labs/eagle1/chapter4/ , file wireshark-setup- 0.99.4.exe . Windows command line utilities ftp and tftp will be used to connect to Eagle Server and download files. All contents are Copyright © 1992–2007 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 2 of 10
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CCNA Exploration Network Fundamentals: OSI Transport Layer Lab 4.5.2: TCP/IP Transport Layer Protocols, TCP and UDP Task 1: Identify TCP Header Fields and Operation using a Wireshark FTP Session Capture. Step 1: Capture a FTP session. TCP sessions are well controlled and managed by information exchanged in the TCP header fields. In this task, a FTP session will be made to Eagle Server. When finished, the session capture will be analyzed. Windows computers use the FTP client, ftp , to connect to the FTP server. A command line window will start the FTP session, and the text configuration file for S1-central from Eagle Server will be downloaded, /pub/eagle_labs/eagle1/chapter4/s1-central , to the host computer. Open a command line window by clicking on Start | Run, type cmd, then press OK.
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Lab_04_5_2_1 - Lab 4.5.2: TCP/IP Transport Layer Protocols,...

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