9COMMON UPPER-LAYER PROTOCOLS
In this chapter, we’ll continue to examine the functions of individual protocols, as well as what they look like when viewed with Wireshark. We’ll discuss five of the most common upper-layer (layer 7) protocols: DHCP, DNS, HTTP, and SMTP.
Dynamic Host Configuration Protocol (DHCP)
In the early days of networking, when a device wanted to communicate over a network, it needed to be assigned an address by hand. As networks grew, this manual process quickly became cumbersome. To solve this problem, Bootstrap Protocol (BOOTP) was created to automatically assign addresses to network-connected devices. BOOTP was later replaced ...
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