On slide “tcpdump”, we see that tcpdump is a program that will read traffic on the network. By
default, it will collect and print, in a standard format, all the traffic passing on the network. There
are command line options for tcpdump that will alter the default behavior, either by collecting
specified records, printing in a more verbose mode (-v), printing in hexadecimal (-x) or writing
records as “raw packets” to a file (-w) instead of printing as standard output.