Chapter 4. Troubleshooting TCPIP


Chapter 4. Troubleshooting TCP/IP

Terms you'll need to understand:

  • Address Resolution Protocol (ARP)

  • IP address

  • Transmission Control Protocol (TCP)

  • User Datagram Protocol (UDP)

  • Well-known Port Numbers

  • Ephemeral Port Numbers

Techniques you'll need to master:

  • ICMP Protocol Commands and the meanings of the characters displayed by the trace command output

  • How to find the valid subnets, valid hosts , and the broadcast address for each subnet

  • show ip commands and syntaxes

  • How and when to use Debug ip commands

TCP/IP ( Transmission Control Protocol/Internet Protocol ) addressing is the foundation of almost every modern network today. IP Addresses are used to route data across the Internet and the world. Virtually every PC connected to the Internet is assigned an IP address; even the Palm Pilot I have in my backpack has an IP address. Although you can use a number of other protocols on your Cisco router, most likely it is TCP/IP problems you will face when troubleshooting your Cisco router or switch problems.

This chapter begins with an overview of the TCP/IP suite and its applications, and follows with troubleshooting issues regarding those protocols. The LAN protocols covered in the Support Exam include TCP/IP and Novell IPX. The following sections give an overview of the TCP/IP protocol and what you need to know for the exam to troubleshoot this protocol suite.

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This chapter covers a great deal of information, and it's critically important in your preparation for the CCNP Exam. You can expect that what you learn in this chapter will account for twenty five percent or more of the exam.




CCNP CIT Exam Cram 2 (642-831)
CCNP CIT Exam Cram 2 (Exam Cram 642-831)
ISBN: 0789730219
EAN: 2147483647
Year: 2003
Pages: 213
Authors: Sean Odom

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