Refer to the exhibit. What is the purpose of the configuration?

To function in client mode, the configuration would typically include `ntp server <ip-address>`, directing the router to synchronize with an external NTP server.

The configuration `ntp source <interface>` is used to specify which interface's IP address should be used as the source for NTP packets it sends, not necessarily for becoming an authoritative server.

To receive NTP broadcast packets, the command `ntp broadcast client` would be configured, allowing the router to listen for NTP broadcasts.

The `ntp master [stratum]` command is used to configure a router as an authoritative NTP server. Even if the router cannot synchronize with an external NTP source, it will advertise itself as an NTP server at the specified stratum level, providing time services to other clients on the network.