Final answer:
The SNMP manager configured with TLS listens on port 10161. This port is distinct from the standard SNMP port (161) and the unsecured traps port (162).
Step-by-step explanation:
An SNMP manager configured to use Transport Layer Security (TLS) listens on port 10161. Simple Network Management Protocol (SNMP) is a widely used protocol for monitoring and managing network devices. When SNMP uses TLS for encrypted communication, it utilizes a designated port.
Therefore, the correct answer is C. 10161. This port is specifically allocated for SNMP over TLS, ensuring that secure management information can be transmitted. Whereas port 161 is the default SNMP port for unsecured communications, and port 162 is used for unsecured SNMP traps. Encrypted SNMP traps would be received on port 10162.