Correct Answer: C
DHCP (Dynamic Host Configuration Protocol) operates over UDP:
* Client uses UDP port 68
* Server uses UDP port 67
It is a connectionless protocol, and because clients typically do not yet have IP addresses, UDP is used due to its simplicity.
MTCNA Course Material - DHCP Protocol Layering:
"DHCP uses UDP for communication between clients and servers. TCP is not used due to the stateless, broadcast nature of DHCP discovery." Rene Meneses MTCNA Study Guide - Port Assignments:
"UDP 67/68 are used by DHCP. TCP is not used because clients lack IPs initially." Other options:
* A: IP is the network layer, not transport
* B: TCP is used by reliable services (FTP, HTTP)
* D: ARP resolves IP-to-MAC; unrelated to DHCP transport