NTP
The Network Time Protocol is an Internet protocol that synchronizes computer clocks over packet-switched networks using reference time sources and timestamp exchanges.
Acing the CCNA Exam: Volume 2 Advanced Networking and Security
Network Time Protocol is an Internet protocol that synchronizes computer clocks across a network using authoritative time sources.
- How it is used
- Uses synchronized clocks to support logging, security functions, troubleshooting, and Cisco IOS client/server configuration.
- How deep it goes
- Explains hierarchy, stratum, ports, modes, commands, verification output, defaults, and synchronization delay; authentication details remain unspecified.
- Examples
- Uses mismatched OSPF logs, reference-clock hierarchy, and Cisco IOS association and clock-status output.
- What you can do after
- Operate/configure NTP clients and servers, verify synchronization, interpret associations, and select redundant time sources.
Read how Acing the CCNA Exam: Volume 2 Advanced Networking and Security explains NTP →
Rust in Action: Systems programming concepts and techniques
NTP is a network protocol for synchronizing computer clocks using timestamp exchanges between clients and time servers.
- How it is used
- Synchronizes a computer’s clock with network time servers, including during boot.
- How deep it goes
- Works through request and response timestamps, offset, delay, and clock adjustment; leaves fuller protocol error handling aside.
- Examples
- Uses a Rust client’s four-timestamp exchange and a Raspberry Pi that needs time at boot.
- What you can do after
- Build it from scratch as a request-response client that compares server time and makes cautious local-clock adjustments.
Read how Rust in Action: Systems programming concepts and techniques explains NTP →
Related concepts
- clockconfigures · A computer clock is a timekeeping source or interface that provides time values or measurements to software.
- UDPuses · UDP (User Datagram Protocol) is a connectionless transport-layer protocol that sends datagrams without guaranteeing delivery, ordering, or duplicate suppression.
- chronocontrasts with · chrono is a Rust library providing types and operations for representing, manipulating, formatting, and parsing dates and times.
- request messageuses · An HTTP request is a message sent by a client to a server that specifies a method and target and may include headers and a body.
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