Intermediate
Computer Networks
Q64 / 100
What is DNS caching and TTL?
Correct! Well done.
Incorrect.
The correct answer is B) Recursive resolvers cache DNS responses for the TTL (time-to-live) period, reducing repeated queries to authoritative servers
B
Correct Answer
Recursive resolvers cache DNS responses for the TTL (time-to-live) period, reducing repeated queries to authoritative servers
Explanation
DNS TTL is set by zone administrators (e.g., 3600 seconds). Resolvers cache answers until TTL expires, reducing load on authoritative servers. Short TTLs enable faster propagation of changes but increase query load.
Progress
64/100