Implementing Cisco IP Telephony and Video Part 2 (CIPTV2, legacy) — Question 83

An engineer is configuring a SIP profile for Cisco VCS SIP trunk on Cisco Unified Communications Manager and enables the option "Use Fully Qualified Domain
Name" in SIP Requests. Which result is achieved by enabling this option?

Answer options

• A. Resolve FQDN using DNS type SRV record.
• B. Resolve FQDN using DNS type A record.
• C. Ensure FQDN is used in SIP Identity header.
• D. Ensure FQDN is used in SIP Request header.

Correct answer: C

Explanation

Enabling the 'Use Fully Qualified Domain Name' option ensures that the FQDN is incorporated into the SIP Identity header, which is essential for proper identification in SIP communications. The other options relate to DNS resolution or header types that are not affected by this specific setting.