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4.4.3. Time Protocols
Accurate time is critical for security (Kerberos requires <5 minute skew), logging (correlating events across systems), and troubleshooting (knowing when events occurred).
| Protocol | Purpose | Accuracy |
|---|---|---|
| NTP | Network Time Protocol—synchronize clocks | Milliseconds |
| PTP | Precision Time Protocol—high-accuracy environments | Microseconds/nanoseconds |
| NTS | Network Time Security—authenticated NTP | Milliseconds (secured) |
Written byAlvin Varughese
Founder•15 professional certifications