What port do SNMP agents listen on?

Port 161

Port 21

Port 162

Port 20

The correct answer is letter "A": Port 161.

Explanation:

A Simple Network Management Protocol (SNMP) agent is the component of most software that enables executing the object, responding to requests and issues. The SNMP agent sends messages to the SNMP manager when an event takes place. This communication is held through a port 161.

Port 161

Explanation:

SNMP stands for Simple Network Management Protocol. This protocol is used by SNMP agents to transfer information about managed devices to the SNMP manager.

Port 161 is the default User Datagram Protocol (UDP) port used by SNMP agents, that is SNMP agents listen for incoming data requests on port 161. Port 162 is used by SNMP managers to receive incoming notifications.

Port 20 and 21 are not relevant for SNMP traffic.