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Chapter 2. Networking for Packet Analysts

Packet analysis is all about analyzing how applications transfer useful data from point A to point B over networks. So, an understanding of how networks function is essential.

In this chapter, we will cover the following topics:

  • Why the seven-layer OSI model matters
  • IP networks and subnets
  • Switching and routing packets
  • Ethernet frames and switches
  • IP addresses and routers
  • WAN links
  • Wireless networking

The seven-layer OSI model will be mapped to the most common networking terms, and we'll review frames, switching, IP addressing, routing, and a few other networking topics of interest. The goal is to develop a mental model of networking that lends itself well to packet-level analysis.

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