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350-401 · Question #517

A network engineer must configure a router to send logging messages to a syslog server based on these requirements: uses syslog IP address: 10.10.10.1 uses a reliable protocol must not use any well-kn

The correct answer is A. logging host 10.10.10.1 transport tcp port 1024. To configure a router to send logging messages to a syslog server reliably and using a non-well-known port, the configuration must specify TCP transport and a port number 1024 or higher.

Submitted by lars.no· Mar 6, 2026Network Assurance

Question

A network engineer must configure a router to send logging messages to a syslog server based on these requirements: uses syslog IP address: 10.10.10.1 uses a reliable protocol must not use any well-known TCP/UDP ports Which configuration must be used?

Options

  • Alogging host 10.10.10.1 transport tcp port 1024
  • Blogging origin-id 10.10.10.1
  • Clogging host 10.10.10.1 transport udp port 1023
  • Dlogging host 10.10.10.1 transport udp port 1024

How the community answered

(28 responses)
  • A
    71% (20)
  • B
    7% (2)
  • C
    18% (5)
  • D
    4% (1)

Why each option

To configure a router to send logging messages to a syslog server reliably and using a non-well-known port, the configuration must specify TCP transport and a port number 1024 or higher.

Alogging host 10.10.10.1 transport tcp port 1024Correct

The `logging host 10.10.10.1 transport tcp port 1024` command correctly specifies the syslog server IP, uses TCP for reliable message delivery as required, and designates port 1024, which is outside the well-known port range (0-1023) and therefore meets all requirements.

Blogging origin-id 10.10.10.1

The `logging origin-id` command configures the source identifier for syslog messages and does not specify the syslog server destination, transport protocol, or port.

Clogging host 10.10.10.1 transport udp port 1023

This option uses UDP as the transport protocol, which is unreliable, and specifies port 1023, which is within the well-known port range, thus failing to meet the reliability and non-well-known port requirements.

Dlogging host 10.10.10.1 transport udp port 1024

This option uses UDP as the transport protocol, which is unreliable, failing the requirement for a reliable protocol, even though port 1024 is a non-well-known port.

Concept tested: Syslog configuration with TCP and custom port

Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/esm/command/esm-cr-book/esm-cr-l1.html#wp2456382173

Topics

#syslog#reliable transport#TCP logging#non-well-known ports

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