Network Analysis Using Wireshark 2 Cookbook - Second Edition

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Here we see an example of a capture file taken from a network center, and what we can get from it.

In the following screenshot, we see an internal network where most of the packets go to a Cisco device, probably a router, and an HP device (1). Then we see several devices with unresolved MAC addresses (2). Next, we see a broadcast (3) and spanning tree frames (4), IPv4 and IPv6 multicasts (as we will see in Chapter 10, Network Layer Protocols and Operations, IPv6 multicasts starts with 33:33:00), and in the last line, these frames from their first six numbers can be one of the presented options—Cisco Discovery Protocol (CDP), Virtual Trunk Protocol (VTP) or the other three protocols mentioned:

In the next capture file example, ...