Answer :
Final answer:
A stub zone is the type of DNS zone that only includes an SOA record, NS records, and glue A records to facilitate the resolution of those NS records. It helps improve the efficiency of DNS queries within a network.The correct answer is option b) Stub zone.
Explanation:
The type of DNS zone that contains only an SOA record, one or more NS records, and the necessary glue A records to resolve NS records is a stub zone. A stub zone is a small-zone file on a DNS server that contains just enough information to identify the authoritative DNS servers for that zone. The key purpose of a stub zone is to maintain a copy of the name server and SOA records for a particular zone. By doing this, the DNS server holding the stub zone can answer queries for records in the authoritative zone without needing to query the internet. This can improve the efficiency of name resolution for frequently accessed zones and simplify DNS administration by limiting the amount of zone data that needs to be maintained.
A primary zone is where the zone can be edited and is the authoritative source for information on that zone. A secondary zone is a read-only copy of the zone that gets its information from the primary zone through zone transfers. A tertiary zone does not exist in standard DNS terminology. Hence, the correct direct answer to the question would be option b) Stub zone.
