Objective 3.02 Given a Scenario Determine What Is the Effect of Changing the Features Enabled in a DNS Profile 302 Practice Questions (Page 3)

Questions 11–14

1. 11application · medium

   A BIG-IP DNS administrator is setting up a new GTM configuration. The DNS profile has BIND enabled, and the GTM pool also has BIND enabled. What is the recommended action to ensure proper GTM operation?

   • ADisable BIND in both the DNS profile and the GTM pool.
   • BDisable BIND in the DNS profile and enable it in the GTM pool.
   • CEnable BIND in the DNS profile and disable it in the GTM pool.
   • DLeave BIND enabled in both, as it does not affect GTM.
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   A DNS profile is configured with a forwarder for all unhandled queries. What happens to a query that does not match any local zone?

   • AThe query is forwarded to the configured forwarder, and the response is relayed back to the client.
   • BThe query is dropped because it does not match a local zone.
   • CThe query is answered with a referral to the forwarder.
   • DThe query is answered with SERVFAIL because the forwarder is not authoritative.
   Reveal Solution Discussion Select an answer first
4. 13application · medium

   An enterprise runs BIG-IP DNS as a caching resolver for internal clients. The DNS profile has recursion enabled, but the administrator wants to ensure that queries for internal-only domains (e.g., 'corp.local') are not forwarded to external resolvers. Which configuration change will achieve this?

   • ADisable recursion in the DNS profile.
   • BEnable DNS Express for the 'corp.local' zone.
   • CSet the unhandled query action to 'drop'.
   • DCreate a DNS zone for 'corp.local' and mark it as authoritative.
   Reveal Solution Discussion Select an answer first
5. 14foundation · easy

   A DNS profile is configured to accept queries over both UDP and TCP. What is the primary reason TCP is used for DNS queries?

   • ATCP is required for all recursive queries to prevent cache poisoning.
   • BTCP is used for zone transfers and for responses that exceed the UDP size limit.
   • CTCP is faster for small queries because it avoids connection setup overhead.
   • DTCP is used only when the client requests it, and the server can ignore it.
   Reveal Solution Discussion Select an answer first