Question 25

Question

[Security Concepts]
Which type of data exfiltration technique encodes data in outbound DNS requests to specific servers
and can be stopped by Cisco Umbrella?

Accepted Answer

DNS tunneling

Ajay · Answer

A . DNS tunneling uses outbound DNS queries to sneak data out, which Umbrella is designed to block. B is just flooding, not exfiltration. Lot of folks mix up C and D here but they aren’t about covert data transfer.

Skyler T. · Answer

I've seen similar questions in Cisco's official guide and practice tests, usually DNS tunneling is called out as the technique that gets flagged by Umbrella. A

Luke E. · Answer

That’s DNS tunneling. A

Noah J. · Answer

B or C depends on ASA software version, right? Does the question specify which ASA firmware they're using? The official guide sometimes mentions different limits depending on version.

Cisco 350-701 Real Exam Questions [October 2026 Update] Quiz

[Security Concepts] Which type of data exfiltration technique encodes data in outbound DNS requests to specific servers and can be stopped by Cisco Umbrella?

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