Simple definition
Network Time Protocol (NTP) synchronizes clocks on computers, servers and network equipment.
Technical definition
NTP exchanges timing information with configured time sources and estimates offset and network delay. A stable time hierarchy helps keep clocks consistent; accurate synchronization is especially important for logs, certificates and authentication.
What is it used for ?
Maintain consistent timestamps across servers, security logs, monitoring systems and distributed applications.
Practical example
For example, domain-joined Windows computers need sufficiently synchronized time for Kerberos authentication. Check the configured time source when authentication fails because of clock skew.
Common issues
- Source NTP inaccessible
- Significant clock setting
- Different configuration between equipment
Related terms
Key takeaway: This entry explains the general operation of the term. Exact settings may vary depending on software, vendors and environments.