101 · Question #308
101 Question #308: Real Exam Question with Answer & Explanation
The correct answer is C: They have data centers in several countries.. Authoritative Screening is the preferred architecture when GTM must serve geographically distributed data centers, because it places GTM as the single authoritative source for DNS resolution across all regions without relying on consistent delegation from heterogeneous regional D
Question
Options
- AThey want GTM to examine all DNS queries.
- BThey want GTM to make load balancing decisions based on metrics.
- CThey have data centers in several countries.
- DThey are using several operating systems for the local DNS servers.
Explanation
Authoritative Screening is the preferred architecture when GTM must serve geographically distributed data centers, because it places GTM as the single authoritative source for DNS resolution across all regions without relying on consistent delegation from heterogeneous regional DNS infrastructures.
Common mistakes.
- A. Both Authoritative Screening and Delegation allow GTM to inspect DNS queries for managed zones, so the desire to examine queries does not differentiate between the two architectures.
- B. Metric-based load balancing is a core GTM capability available regardless of whether the deployment uses Delegation or Authoritative Screening.
- D. The operating systems of local DNS servers do not determine the appropriate architecture - both Delegation and Authoritative Screening can coexist with heterogeneous DNS server environments.
Concept tested. GTM DNS architecture - Authoritative Screening vs Delegation
Reference. https://techdocs.f5.com/kb/en-us/products/big-ip_gtm/manuals/product/gtm-concepts-11-4-0/2.html
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