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CCNP Practical Studies: Troubleshooting by Donna L. Harrington

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Protocols and Packets

This section covers some of the protocols, applications, and utilities at each layer of the TCP/IP suite that may assist you with supporting day-to-day internetworks. First the Internet Layer is discussed, then the Transport Layer, and finally the Application Layers. Each layered subsection contains protocol analysis and packet captures, including a review of the packet headers, to help you better understand the packet traces and prepare you for troubleshooting on your own.

Table 3-2 and the following subsections provide a layered perspective of many of the TCP/IP-related protocols, applications, and utilities.

NOTE

The asterisk (*) next to the protocols in Table 3-2 is just to draw your attention to the fact that protocols ...

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