Objective 3.02 Given a Scenario Determine What Is the Effect of Changing the Features Enabled in a DNS Profile 302 Practice Questions (Page 2)

Questions 6–10

1. 6expert · hard

   A service provider runs BIG-IP DNS for multiple customers. One customer requires that all DNS queries be answered over TCP only, while another customer requires UDP for performance. The provider wants to support both requirements without deploying separate BIG-IP systems. What is the best approach?

   • ACreate two DNS profiles, one with UDP disabled and one with UDP enabled, and assign them to different virtual servers.
   • BDisable UDP globally and use TCP for all customers.
   • CEnable both UDP and TCP in a single DNS profile and let clients choose.
   • DUse a separate BIG-IP system for each customer.
   Reveal Solution Discussion Select an answer first
2. 7application · medium

   A BIG-IP DNS administrator is configuring a DNS profile for a public-facing authoritative DNS service. The administrator wants to ensure that clients can always receive responses, even if the response is large. Which protocol configuration should be used?

   • AEnable TCP only.
   • BEnable UDP only.
   • CEnable both UDP and TCP.
   • DDisable both UDP and TCP.
   Reveal Solution Discussion Select an answer first
4. 8expert · hard

   A company runs BIG-IP DNS as an authoritative server for its public domain and also as a recursive resolver for internal clients. The DNS profile has recursion enabled, and BIND is enabled in the profile. The security team wants to prevent the BIG-IP from being used as an open resolver, but internal clients still need to resolve external domains. What is the best configuration?

   • ADisable BIND in the DNS profile and GTM pools, and set the unhandled query action to 'drop'.
   • BEnable BIND and set the unhandled query action to 'forward'.
   • CDisable recursion in the DNS profile.
   • DUse a separate DNS profile for internal and external queries.
   Reveal Solution Discussion Select an answer first
5. 9expert · hard

   A large enterprise runs BIG-IP DNS as both an authoritative server for its public domain and a recursive resolver for internal clients. The DNS profile has recursion enabled, and BIND is enabled in the profile. Recently, internal clients have been experiencing intermittent resolution failures for external domains. The administrator suspects a conflict between BIND and GTM. What is the best course of action?

   • ASet the unhandled query action to 'drop'.
   • BEnable BIND in the GTM pools to ensure consistency.
   • CDisable recursion in the DNS profile.
   • DDisable BIND in the DNS profile and GTM pools.
   Reveal Solution Discussion Select an answer first
6. 10application · medium

   A BIG-IP DNS administrator is troubleshooting why a GTM pool is not responding to DNS queries. The DNS profile has BIND enabled, and the GTM pool has BIND enabled. What is the most likely cause?

   • AGTM is not configured with a valid DNS zone.
   • BThe virtual server is not listening on the correct port.
   • CBIND is conflicting with GTM, preventing it from responding to queries.
   • DThe DNS profile has recursion disabled.
   Reveal Solution Discussion Select an answer first