COMPUTER NETWORKING

Detailed explanation-1: -DHCP uses the User Datagram Protocol (UDP), a connectionless service model. It works with two UDP port numbers that are the same as the ones for the bootstrap protocol (BOOTP). The server listens on UDP port number 67, and the client listens on port number 68.

Detailed explanation-2: -DHCP servers also use port 67 to initiate communication between the client and server on the network. If port 67 is used by another application, DHCP will fail to function.

Detailed explanation-3: -DHCP is based on BOOTP which was created in 1985. BOOTP uses TFTP as the file transfer protocol. TFTP was created in 1981 and uses port 69, so it was a thing of using the nearest non-used ports (68 and 67).

Detailed explanation-4: -DHCP uses UDP port 67 on the server side and UDP port 68 on the client side. DHCP also has two versions: DHCPv4 and DHCPv6 to support IPv4 and IPv6, respectively. These two versions, much like the two versions of IP, are very different and are therefore considered separate protocols and use separate ports.