Question

Simple Network Management Protocol (SNMP) operates at which port number?
1. 160
2. 161
3. 164
4. 163

Answer 1

Correct Answer - Option 2 : 161

The correct answer is 161.

• The SNMP agent receives requests on User Datagram Protocol port 161.
• The manager may send requests from any available source port to port 161 in the agent.
• The agent response is sent back to the source port on the manager. 
• It uses port number 162 when agents send unsolicited traps to the SNMP Manager.

Several important port numbers used in web technology:

• Domain Name System - 53
• Hypertext Transfer Protocol - 80
• File Transfer Protocol - 20
• Network Time Protocol - 123
• Telnet - 23
• Internet Message Access Protocol - 143