300-415 Question #445: Real Exam Question with Answer & Explanation

The correct answer is B: intercepts and inspects DNS queries from hosts. Cisco Umbrella provides DNS security by intercepting and inspecting DNS queries originating from hosts before any connection is established.

Security and Quality of Service

Question

Which phrase describes the method Cisco Umbrella employs to provide DNS security?

Options

Acaptures and inspects HTTP GETs from hosts
Bintercepts and inspects DNS queries from hosts
Cinspects DNS queries from local DNS servers
Dvalidates the DNS queries from local proxy servers

Explanation

Cisco Umbrella provides DNS security by intercepting and inspecting DNS queries originating from hosts before any connection is established.

Common mistakes.

A. Cisco Umbrella primarily works at the DNS layer; capturing and inspecting HTTP GETs is a function typically performed by web proxies or secure web gateways, not its core DNS security mechanism.
C. While Umbrella can receive DNS queries forwarded from local DNS servers, its fundamental mechanism involves inspecting the queries themselves, often directly from hosts configured to use Umbrella DNS, rather than just inspecting "from" the local DNS server.
D. Cisco Umbrella does not primarily validate DNS queries originating from local proxy servers; its main function is to apply security intelligence to DNS resolutions, typically direct from endpoints or forwarded from local resolvers.

Concept tested. Cisco Umbrella DNS security mechanism

Reference. https://docs.umbrella.com/umbrella-user-guide/docs/about-umbrella

Topics

#Cisco Umbrella#DNS security#DNS resolution#Threat detection

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