Implementing and Operating Cisco Collaboration Core Technologies (CLCOR) — Question 272

Why does Cisco UCM use DNS?

Answer options

• A. It connects endpoints to single sign-on services
• B. It provides SRV resolution to the endpoints registered.
• C. It provides certificate-based security for media.
• D. It resolves FQDN to IP address resolution for trunks.

Correct answer: D

Explanation

The correct answer is D because DNS is essential for resolving Fully Qualified Domain Names (FQDN) to IP addresses, which is critical for trunk communication in Cisco UCM. Option A is incorrect as single sign-on services do not directly involve DNS. Option B is misleading since SRV resolution is part of DNS but does not encompass its primary role in trunking. Option C is also wrong as certificate-based security does not relate to the primary function of DNS.