Which of the following ports is used for SNMP traps?

The correct choice is based on the fact that SNMP (Simple Network Management Protocol) uses specific ports for its operations. SNMP operates primarily over UDP. Port 161 is used for SNMP communication requests from a management station to an SNMP agent, allowing the management station to retrieve or set information. However, when it comes to SNMP traps, which are unsolicited messages sent from an SNMP agent to a management station, these messages use a different port.

SNMP traps specifically use port 162. This port is defined in the SNMP protocol specification as the designated port for receiving trap notifications. When a network device detects an event or condition that may require attention, it sends a trap message to a configured management station via this port, enabling administrators to monitor the network effectively.

The choice indicating port 66 is not relevant to SNMP, nor is port 514, which is used for syslog messages. While port 161 is for SNMP requests, it is specifically the trap messages that utilize port 162, making this the correct answer.