Which port number is used by DHCPv6 client 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 client communications?

Explanation:
DHCPv6 uses fixed UDP ports: the client communicates from UDP port 546, while the server listens on and replies from UDP port 547. In operation, the client sends requests from port 546 to the server’s port 547, and the server responds from 547 back to 546. This separation helps clearly distinguish client and server roles in IPv6 address configuration, and it’s different from DHCP for IPv4, where clients use port 68 and servers use 67. The other numbers listed aren’t used for DHCPv6 client communications.

DHCPv6 uses fixed UDP ports: the client communicates from UDP port 546, while the server listens on and replies from UDP port 547. In operation, the client sends requests from port 546 to the server’s port 547, and the server responds from 547 back to 546. This separation helps clearly distinguish client and server roles in IPv6 address configuration, and it’s different from DHCP for IPv4, where clients use port 68 and servers use 67. The other numbers listed aren’t used for DHCPv6 client communications.

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