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Difficulty: EasyNetworking Ports and Protocols

A network technician is configuring firewall rules to allow a centralized monitoring server to poll system status and hardware performance metrics from managed network switches using Simple Network Management Protocol (SNMP). Which of the following transport protocol ports must be permitted through the firewall?

  1. UDP port 161Answer
  2. B
    UDP port 123
  3. C
    UDP port 53
  4. D
    UDP port 67

Answer

UDP port 161 is the standard port used by Simple Network Management Protocol (SNMP) to query and monitor managed devices.
Simple Network Management Protocol (SNMP) uses UDP port 161 by default for sending queries to managed devices and receiving operational metrics.

Step-by-Step Solution

1
Identify the service requested in the administrative scenario.
The required service is Simple Network Management Protocol (SNMP) polling.
The technician needs to collect switch performance metrics and system status.
2
Select the correct standard port assignment for SNMP communication.
SNMP agent requests and queries operate over UDP port 161.
Network monitoring systems send queries to remote SNMP agents using port 161.

Key Concept

SNMP protocol port assignment
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Topics

Networking Ports and Protocols

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