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Practical Packet Analysis, 2nd Edition by Chris Sanders

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802.11 Packet Structure

80211beacon.pcap

The primary difference between wireless and wired packets is the addition of the 802.11 header. This is a layer 2 header that contains extra information about the packet and the medium on which it is transmitted. There are three types of 802.11 packets:

Management These packets are used to establish connectivity between hosts at layer 2. Some important subtypes of management packets include authentication, association, and beacon packets.
Control Control packets allow for delivery of management and data packets and are concerned with congestion management. Common subtypes include request-to-send and clear-to-send packets.
Data These packets contain actual data and are the only packet type that can be forwarded ...

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