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Zorluk: OrtaNetworking Ports and Protocols

A system administrator is configuring inbound ACLs on a network monitoring server that periodically sends polling queries to network devices to collect hardware performance metrics. Which of the following port and transport layer protocol combinations must be opened on the target network devices to accept these incoming SNMP polling queries?

  1. UDP port 161Cevap
  2. B
    TCP port 161
  3. C
    UDP port 162
  4. D
    UDP port 67

Cevap

UDP port 161 must be opened on managed network devices to accept incoming SNMP polling queries.
Simple Network Management Protocol (SNMP) agents listen for polling requests from a management console on UDP port 161. UDP is chosen for low-overhead status polling across network infrastructure.

Adım Adım Çözüm

1
Identify the protocol required for collecting hardware metrics via polling queries.
Simple Network Management Protocol (SNMP) is used for querying status metrics from managed devices.
SNMP allows management systems to poll network nodes for status and performance data.
2
Determine the transport layer protocol and default port number used by SNMP agents for polling.
SNMP agents receive queries over UDP on port 161.
UDP port 161 is the standard port designated for SNMP manager-to-agent polling messages.

Anahtar Kavram

Simple Network Management Protocol (SNMP) Port and Transport Layer Requirements
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Konular

Networking Ports and Protocols

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