NETWORK SECURITY
FIREWALLS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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TCP/UDP 67
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TCP/UDP 69
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TCP/UDP 123
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None of the above
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Detailed explanation-1: -The DHCP protocol uses UDP as the transport protocol and uses UDP 67/68 ports. The host sends a request message to port 68 of the DHCP server, and the DHCP server responds with a reply message to port 67 of the host.
Detailed explanation-2: -The DHCP employs a connectionless service model, using the User Datagram Protocol (UDP). It is implemented with two UDP port numbers for its operations which are the same as for the bootstrap protocol (BOOTP). The server listens on UDP port number 67, and the client listens on UDP port number 68.
Detailed explanation-3: -DHCP uses UDP as its transport protocol.
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.
Detailed explanation-5: -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).