SNMP uses which port number?

SNMP uses which port number?

• A. 2049
• B. 512
• C. 161
• D. 88

Answer: (C)

SNMP traffic runs over UDP and uses specific well-known ports for different kinds of communication. For the typical manager-to-agent queries and the agent’s normal responses, the standard port is UDP 161. This is the port agents listen to and managers contact to perform requests like get, set, or walk. There’s also UDP 162, which is used when agents send traps back to the manager, but for the standard SNMP operations the port in use is 161. Why the other numbers don’t fit: that range includes ports assigned to other services. For example, 2049 is used by NFS, and 88 is used by Kerberos. The remaining option isn’t an SNMP port, so it doesn’t match how SNMP communicates.

SNMP traffic runs over UDP and uses specific well-known ports for different kinds of communication. For the typical manager-to-agent queries and the agent’s normal responses, the standard port is UDP 161. This is the port agents listen to and managers contact to perform requests like get, set, or walk. There’s also UDP 162, which is used when agents send traps back to the manager, but for the standard SNMP operations the port in use is 161.

Why the other numbers don’t fit: that range includes ports assigned to other services. For example, 2049 is used by NFS, and 88 is used by Kerberos. The remaining option isn’t an SNMP port, so it doesn’t match how SNMP communicates.