The topics covered in this chapter included protocol and field coverage of the network layer protocols IPv4, ARP, IGMP, ICMP, IPv6, and ICMPv6; the transport layer protocols UDP and TCP; an overview of the application layer protocols DHCP, DHCPv6, and DNS; and a more in-depth look at HTTP.

In the next chapter, we'll put all the topics covered so far to good use by using Wireshark to troubleshoot the functionality and performance issues.