Free Microsoft AZ-140 Actual Exam Questions - Question 2 Discussion
HOTSPOT You need to recommend a DNS infrastructure that meet the performance requirements. What should you recommend? To answer, select the appropriate options in the answer are a. NOTE: Each correct selection is worth one point. 
I’d also exclude B since internal DNS won’t improve external query speed. A is designed for low-latency, global DNS resolution which fits the performance need. C adds failover options, so it’s key for keeping DNS responsive if something goes wrong. Together, A and C make the most sense to cover fast and reliable DNS.
I’d drop B quickly since it’s internal and won’t help with external performance. A handles global load well, and C provides backup, so together they cover speed and reliability.
Agree A and C are solid picks. A handles global queries efficiently, while C boosts uptime with redundancy, covering different angles for performance. B doesn’t fit since it’s mainly internal DNS.
I’d also rule out B since it’s more of an internal DNS service. A gives good global reach and low latency, and C adds the needed redundancy, so those two seem like the best combo for performance.
C for redundancy plus A to cover global performance and low latency.
Not going with B since it’s mostly for internal, looks like A and C are better for perf.