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Depending on the client software, the accuracy provided can be close to a few tens of
microseconds.
For added security, clients can be configured to use a different secret key for each server.
3.4.2. Broadcast mode
An NTP server configured in broadcast mode regularly sends an NTP packet to a
configurable IP address. This address can be a broadcast address (all devices on the
network receive a packet), a multicast address (all devices configured to monitor the address
receive a packet) or a unicast address (only the device at the address receives the packet).
Caution: routing of packets to a broadcast or multicast address is usually disabled by default
on commercially available routers.
This mode can be used to synchronise clients with less network traffic (traffic with several
clients in this mode is then lower than with a single client in client/server mode) but the
transmission will not be compensated unlike in client/server mode.
3.5. TIME SERVER STATUS
The following diagram shows the different states of the time server:
