Implementing Cisco SD-WAN Solutions (ENSDWI) — Question 420

How does Cisco Umbrella respond to the client if the FQDN in the DNS query is one of the grey-listed domains?

Answer options

• A. It returns the IP address of the content provider.
• B. It returns the unicast IP addresses of intelligent proxy.
• C. It returns the IP address of the blocked landing page.
• D. No response is sent: traffic is blocked.

Correct answer: B

Explanation

The correct answer is B because Cisco Umbrella uses intelligent proxies to handle traffic for grey-listed domains, providing unicast IP addresses. Option A is incorrect as it does not apply to grey-listed domains, and option C is wrong since blocked landing pages are not returned for grey-listed domains. Option D is also incorrect because traffic is not simply blocked without a response; instead, it is directed to the intelligent proxy.