Which type of DNS server identifies the top-level domains on the Internet?

A.
Root

B.
Master

C.
Primary

D.
Caching

Explanation:
The highest level domain servers on the internet are the root servers. These are the servers
service the domain . (Period, pronounced DOT). Off of this domain are your first level domains,
such as COM, ORG, EDU, MIL, etc.
Incorrect Answers:
B: A Master DNS server maintains the DNS database for its appropriate zone. It is also the
authority for the zone.
C: A primary DNS server is a DNS server that you would install locally at a company to service
that company.
D: A caching DNS server has no authority nor database. It builds it cache of information based on
information it receives calling other DNS servers while satisfying requests.