The lab of WiFi sniffing by tcpdump is released

This lab will give a brief introduction of the basic principles and protocols of 802.11 Wifi network as well as three major 802.11 frame types. Based on the usage of tcpdump from previous labs, students will be asked to use tcpdump in monitor mode to capture packets with radiotap header information, analyze signal strength and figure out which wireless frame contains radiotap header and how different distances effect received signal strength. Students are assumed to be comfortable using a command line interface.