Which port number is used by DHCPv6 server communications?

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Prepare for the CPSA Port Numbers exam with multiple choice questions and detailed explanations. Understand key protocols and services to excel in your test.

Multiple Choice

Which port number is used by DHCPv6 server communications?

Explanation:
DHCPv6 uses two well-known UDP ports: the server listens on 547 and the client uses 546. When a client talks to a DHCPv6 server, it sends from port 546 to destination port 547, and the server replies from 547 back to 546. So the port number used by DHCPv6 server communications is 547. The other options correspond to different roles or protocols (546 is the client port, 68 is DHCPv4’s client port, and 9 isn’t a DHCP port).

DHCPv6 uses two well-known UDP ports: the server listens on 547 and the client uses 546. When a client talks to a DHCPv6 server, it sends from port 546 to destination port 547, and the server replies from 547 back to 546. So the port number used by DHCPv6 server communications is 547. The other options correspond to different roles or protocols (546 is the client port, 68 is DHCPv4’s client port, and 9 isn’t a DHCP port).

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