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Usage Analysis of the NIST Internet Time Service
Jeff A Sherman1, Judah Levine1,2
1National Institute of Standards and Technology, Boulder, CO 80305.
Summary
The National Institute of Standards and Technology
Area of Science:
- Network Time Synchronization
- Internet Protocols
- Distributed Systems
Background:
- The National Institute of Standards and Technology (NIST) provides the Internet Time Service (ITS) to synchronize network device clocks.
- Accurate time synchronization is crucial for internet functionality and security.
Purpose of the Study:
- To analyze the usage patterns of the NIST Internet Time Service.
- To understand the scale and scope of ITS adoption across the internet.
- To provide recommendations for improving network time services.
Main Methods:
- Analysis of inbound network traffic data from ITS servers.
- Examination of unique Internet Protocol (IPv4) addresses accessing ITS.
- Statistical analysis of time request volumes and sources.
Main Results:
- NIST ITS servers receive over 16 billion time requests daily.
- Two ITS servers alone handled requests from 316 million unique IPv4 addresses in four weeks, representing at least 8.5% of the internet.
- Significant global reach and usage of NIST's free time service.
Conclusions:
- The NIST ITS is a critical internet infrastructure component with massive reach.
- Understanding ITS usage patterns is vital for network management and service provision.
- Recommendations are provided for manufacturers and service providers to optimize network time services.