An administrator must configure the DNS SRV records for Mobile and Remote Access for a company with the domain example.com, the Expressway-E FQDN is ExpE.example.com, and the Expressway-C FQDN is…

Question

Options

• ASRV record _collab-edge._tls.example.com that resolves to ExpE.example.com on port 8443
• BSRV record _cisco-uds._tcp.example.com that resolves to ExpE.example.com on port 5061
• CSRV record _cisco-uds._tcp.example.com that resolves to ExpC.example.com on port 8443
• DSRV record _collab-edge._tls.example.com that resolves ta ExpE.example.com on port 5061

• A
  92% (36)
• B
  3% (1)
• C
  5% (2)

Explanation

For Cisco Mobile and Remote Access (MRA), external clients (such as Cisco Jabber or Webex App) use the DNS SRV record '_collab-edge._tls.<domain>' to discover the Expressway-E server. The '_collab-edge' service name is specifically designed for MRA discovery, and it uses TLS transport on port 8443 (HTTPS). The record must point to the Expressway-E FQDN (ExpE.example.com) because Expressway-E is the externally reachable edge server. Option D is wrong because port 5061 is for SIP/TLS, not the HTTPS-based edge discovery. Options B and C are wrong because '_cisco-uds._tcp' is used internally for Unified CM service discovery (UDS), not for Expressway-E edge traversal.

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