Which protocol would allow the organization to synchronize clocks with a globally accessible time server across the Internet?

• A. SNTP
• B. DNS
• C. SSH
• D. NTP

Answer: (D)

Synchronizing clocks over the Internet is handled by the Network Time Protocol. NTP connects to time servers that derive their accuracy from reference clocks such as GPS or atomic clocks, and it distributes that time to clients. Clients repeatedly query these servers and compute the offset and network delay to adjust their local system clocks, keeping all machines aligned within tight tolerances across the globe. This hierarchical, fault-tolerant design makes NTP the standard choice for obtaining a globally accessible time source and maintaining consistent time across an organization. SNTP is a lighter, simpler version of NTP that trades some robustness and precision for reduced complexity, which is why NTP is the better fit when precise, reliable synchronization is needed over the Internet. DNS and SSH do not provide time synchronization services.