Implementing Cisco Collaboration Applications (CLICA) — Question 99

An engineer must configure Open SIP Federation on Cisco IM and Presence using Cisco Expressways with the additional requirement not to allow a specific list of domains and allow all other domains that are not specified. How is this additional requirement met?

Answer options

• A. Block the specified SIP domains on the Expressway.
• B. Add each allowed domain as a SIP Federated Domain.
• C. Add a static route for each blocked domain and keep the “Block Route” checkbox checked.
• D. Configure default static routes for each blocked domain with an invalid next-hop IP address.

Correct answer: A

Explanation

The correct answer is A because blocking specific SIP domains directly on the Expressway meets the requirement of preventing those domains while allowing all others. Option B is incorrect as it would require listing every allowed domain, contradicting the requirement. Option C is not suitable since static routes are not meant for blocking domains in this context, and option D would only misdirect traffic without effectively blocking the domains.