The tickets have a time availabilityperiod, and if the host clock is not synchronized with the Kerberos server clock, the authentication fails.
票据有一个时间可用段，如果主机时钟与Kerberos服务器时钟不同步，则认证失败。
2
Service of credits will be given if uptime availability is not guaranteed after a specified period of time with the following exceptions.
如果在一段规定时期之后不再保证正常运行时间有效性，那么将提供信用服务，以下情况除外。
3
It also includes the sustainment and the maintenance of the installation for a period of 18 years, with guaranteed levels of operational availability of 98% for the radar and its infrastructure.