Which DNS record is used for on-premises service by Jabber clients?

Which DNS record is used for on-premises service by Jabber clients?
A . _collab-edge._tcp.<domain> SRV record
B . _cisco-uds._tls.<domain> SRV record
C . _cisco-uds._tcp.<domain> SRV record
D . <tftp server FQDN> A record

View Answer

Answer: C

Explanation:

Cisco Jabber uses service discovery to identify the available services and decide how to connect to them.

The _cisco-uds._tcp.<domain> SRV record is used by Jabber clients for service discovery when trying to locate the Cisco Unified Communications Manager for on-premises deployments. UDS stands for "Unified Data Service" which is the interface Jabber uses to get its configuration from the Communications Manager.

The _collab-edge._tcp.<domain> SRV record is used by Jabber clients for Mobile and Remote Access (MRA) via Cisco Expressway, i.e., when Jabber is used outside the enterprise network.

The <tftp server FQDN> A record might be used for older phone firmware or other scenarios where direct TFTP resolution is needed, but it’s not the primary method for Jabber client service discovery.

Thus, for on-premises service discovery by Jabber clients, they primarily look for the _cisco-uds._tcp.<domain> SRV record.