What Does NTP Mean in 200-301? — Definition & Guide

Full Definition

NTP synchronises the clocks of routers, switches, and servers to a common time source. Accurate time is critical for log timestamps, digital certificates, scheduled tasks, and security audit trails. NTP uses a hierarchical structure: Stratum 0 is an atomic clock, Stratum 1 servers sync to Stratum 0, Stratum 2 sync to Stratum 1, and so on. Cisco devices can be configured as NTP clients (sync from a server) or NTP servers/peers. NTP uses UDP port 123.

CLI Command

ntp server 216.239.35.0  ! configure NTP server
show ntp status
show ntp associations

Exam Trap — Don't Get Fooled

NTP uses UDP port 123. Syslog uses UDP 514. These are frequently tested port numbers on the CCNA exam. Accurate time is also required for proper syslog correlation and AAA logging.

Related 200-301 Terms

SNMP

A protocol used to monitor and manage network devices via a Network Management Station.

Syslog

A standard protocol for sending log messages from network devices to a central logging server.

Frequently Asked Questions

What does NTP mean on the 200-301 exam?

NTP synchronises the clocks of routers, switches, and servers to a common time source. Accurate time is critical for log timestamps, digital certificates, scheduled tasks, and security audit trails. NTP uses a hierarchical structure: Stratum 0 is an atomic clock, Stratum 1 servers sync to Stratum 0, Stratum 2 sync to Stratum 1, and so on. Cisco devices can be configured as NTP clients (sync from a server) or NTP servers/peers. NTP uses UDP port 123.

How does NTP appear as a trap on the 200-301?

NTP uses UDP port 123. Syslog uses UDP 514. These are frequently tested port numbers on the CCNA exam. Accurate time is also required for proper syslog correlation and AAA logging.

How important is NTP on the 200-301 exam?

NTP falls under the Management domain of the 200-301 exam. Understanding it in context with related terms like syslog and snmp is essential for answering scenario-based questions correctly.