CompTIA Network+ (N10-008) — Question 665

Which of the following is the DNS feature that controls how long a lookup is stored in cache on a server?

Answer options

• A. CNAME
• B. TTL
• C. SOA
• D. SRV

Correct answer: B

Explanation

The correct answer is B, TTL (Time to Live), which specifies the time duration that a DNS record can be cached by a resolver. CNAME, SOA, and SRV are all types of DNS records but do not relate to the caching duration of lookups.