Objective 1.13 Given a Scenario Determine the Impact of a Custom DNS Profile for Various Types of Queries, Determine What Response Will Be Given and Where It Will Come From 302 Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A BIG-IP DNS profile has GTM enabled, DNS cache enabled, and DNS Express enabled for the zone example.com. A client sends a query for a record in example.com that exists in the DNS Express zone data. What is the source of the response?

   • AThe DNS cache, because it is enabled
   • BBIND, because it is the underlying server
   • CGTM, because it handles all queries for example.com
   • DDNS Express, because it serves authoritative responses from memory
   Reveal Solution Discussion Select an answer first
2. 2foundation · easy

   When DNS cache is enabled in a BIG-IP DNS profile, what happens to a query that matches a cached response?

   • AThe query is dropped and no response is sent.
   • BThe query is sent to the BIND server for processing.
   • CThe query is always forwarded to the GTM process.
   • DThe cached response is returned without querying an upstream server.
   Reveal Solution Discussion Select an answer first
4. 3application · medium

   A BIG-IP DNS profile has BIND enabled, DNS cache disabled, GTM disabled, and the unhandled query option set to 'drop'. A client sends a query for a domain that is not in BIND's zone data. What will happen?

   • AThe query is dropped because BIND cannot answer it
   • BThe query is answered by GTM
   • CThe query is forwarded to a resolver
   • DThe query is answered from the DNS cache
   Reveal Solution Discussion Select an answer first
5. 4application · medium

   A company wants to use BIG-IP DNS to serve authoritative responses for a zone with a large number of static records, while also allowing the underlying BIND server to handle queries for other zones. Which combination of DNS profile features should be enabled?

   • ADNS Express and BIND
   • BDNS cache and GTM
   • CBIND and DNS cache
   • DDNS Express and GTM
   Reveal Solution Discussion Select an answer first
6. 5foundation · easy

   What happens to a query that is not handled by other features in a BIG-IP DNS profile when the 'Unhandled Query' option is disabled?

   • AThe query is answered with a SERVFAIL response.
   • BThe query is sent to the BIND server for processing.
   • CThe query is dropped and no response is returned.
   • DThe query is forwarded to the GTM process.
   Reveal Solution Discussion Select an answer first