DHCPv4 uses which UDP ports?

Enhance your skills with the GCIA Traffic Analysis Test. Prepare with insightful questions and detailed explanations. Excel in your exam!

Multiple Choice

DHCPv4 uses which UDP ports?

Explanation:
DHCPv4 runs over UDP and uses a fixed pair of ports: the server listens on UDP port 67 and the client uses UDP port 68. When a client starts, it sends DHCPDISCOVER from source port 68 to destination port 67, often broadcast. The server responds from port 67 to port 68 with DHCPOFFER, then DHCPREQUEST and DHCPACK follow the same port-direction pattern. This fixed pairing (server 67, client 68) is what allows DHCP messages to be correctly exchanged across the network. The other port pairs don’t align with DHCPv4’s standard transport, so they aren’t used.

DHCPv4 runs over UDP and uses a fixed pair of ports: the server listens on UDP port 67 and the client uses UDP port 68. When a client starts, it sends DHCPDISCOVER from source port 68 to destination port 67, often broadcast. The server responds from port 67 to port 68 with DHCPOFFER, then DHCPREQUEST and DHCPACK follow the same port-direction pattern. This fixed pairing (server 67, client 68) is what allows DHCP messages to be correctly exchanged across the network. The other port pairs don’t align with DHCPv4’s standard transport, so they aren’t used.

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