机构名称：
¥ 2.0
Standard NTP and SNTP, open access 1 000 000 requests per second 95% IP version 4 5% IP version 6 Authenticated NTP, limited to registered users NTP + digital signature (details to follow ) 1600 registered addresses, IPv4 only Many international users (Americas, Europe, Asia …) UT1 time in NTP format, open access UTC(NIST) + dut1 from IERS bulletin A (details to follow) 1000 IP地址，IPv4仅以其他时间格式的服务每秒26000个请求，所有提供的服务无需向用户提供费用
NIST的报告
主要关键词
相关文件推荐
