210-060 Question #356: Real Exam Question with Answer & Explanation

The correct answer is A: _cisco-uds. When a Jabber client on an internal network cannot log in, the missing DNS SRV record is _cisco-uds, which directs Jabber to CUCM for user discovery and authentication.

Question

Refer to the exhibit. When a user cannot log into the Cisco Jabber client, the log file from a Windows Jabber client on an Internal network is shown. Which SRV must the DNS administrator create to resolve the problem?

Exhibit

Options

A_cisco-uds
B_sip
C_sips
D_collab-edge

Explanation

When a Jabber client on an internal network cannot log in, the missing DNS SRV record is _cisco-uds, which directs Jabber to CUCM for user discovery and authentication.

Common mistakes.

B. _sip SRV records are used for SIP call routing and trunk resolution, not for Jabber client service discovery or login authentication against CUCM.
C. _sips SRV records handle secure SIP signaling for call routing and are not involved in the Jabber client login or CUCM user discovery process.
D. _collab-edge SRV records enable Mobile and Remote Access (MRA) through Cisco Expressway for users outside the corporate network - not for internal users whose issue is described in the exhibit.

Concept tested. Cisco Jabber internal DNS SRV service discovery

Reference. https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/jabber/Windows/12_9/cjab_b_cisco-jabber-for-windows/cjab_b_cisco-jabber-for-windows_chapter_011.html

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