Which port does TACACS+ use by default on a Cisco router?

ITExamAnswers Editorial Team Last Updated: Jun 29, 2026

IT Exam Items Repository › Category: CCNP ENARSI v9 › Which port does TACACS+ use by default on a Cisco router?

Which port does TACACS+ use by default on a Cisco router?

UDP 149
TCP 149
UDP 49
TCP 49

Explanation: TACACS+ is a Cisco proprietary AAA protocol that utilizes TCP port 49 for communication between the network device and the AAA server. In contrast, RADIUS uses UDP ports 1812 or 1645 for authentication.

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