The Time to Live (TTL) attribute for a DNS record determines how long the record will remain in the Zone file before it is deleted.

The Time to Live (TTL) attribute for a DNS record determines how long the record will remain in the Zone file before it is deleted.

• A. True
• B. False
• C. It determines how long the record remains in the resolver cache
• D. It determines how often the zone is refreshed

Answer: (B)

Time to live is about caching, not the zone file itself. TTL tells resolvers and clients how long they can keep a DNS answer in their cache before they must re-query. It does not cause a record to be deleted or aged out from the authoritative zone file on your DNS server, which is stored and managed by the zone administrator. Updates to zone data are handled by administrators and zone transfers, while the zone’s refresh behavior for secondary servers is defined in the SOA record, not by TTL. So the statement is false because TTL does not control how long a record remains in the zone file.

Time to live is about caching, not the zone file itself. TTL tells resolvers and clients how long they can keep a DNS answer in their cache before they must re-query. It does not cause a record to be deleted or aged out from the authoritative zone file on your DNS server, which is stored and managed by the zone administrator. Updates to zone data are handled by administrators and zone transfers, while the zone’s refresh behavior for secondary servers is defined in the SOA record, not by TTL. So the statement is false because TTL does not control how long a record remains in the zone file.