A network administrator configures a Cisco router to synchronize its time with a public NTP server. The administrator also wants internal network devices to use this router as their time source. Which statement accurately describes the router's NTP roles in this scenario?
An ntp peer configuration is required on the router for it to serve time to internal devices.
The router can only function as an NTP client and cannot simultaneously serve time to other devices.
The router must be configured as an NTP master with a stratum of 1 to provide time to internal devices.
The router functions as an NTP client in relation to the public server and as an NTP server for the internal devices.
In a standard hierarchical NTP design, a router can be configured to get its time from an authoritative upstream source, thereby acting as an NTP client. Simultaneously, it can provide time service to downstream devices, acting as an NTP server for the internal network. This is a common and valid configuration. The router's stratum level will be one higher than its upstream source; it does not need to be a stratum 1 master. An NTP peer relationship is for mutual synchronization between two servers, not for a client-server hierarchy.
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Cisco CCNA 200-301
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