A network technician is on the phone with the system administration team. Power to the server room
was lost and servers need to be restarted. The DNS services must be the first to be restarted. Several
machines are powered off. Assuming each server only provides one service, which of the following should
be powered on FIRST to establish DNS services?

A.
Bind server

B.
Apache server

C.
Exchange server

D.
RADIUS server

Explanation:
BIND (Berkeley Internet Name Domain) is the most widely used Domain Name System (DNS) software on
the Internet. It includes the DNS server component contracted for name daemon. This is the only option
that directly involves DNS.
Incorrect Answers:
B: Apache is the most widely used web server software. It is not specifically required for DNS.
C: Microsoft Exchange Server is calendaring software, a mail server and contact manager developed by
Microsoft. It is not specifically required for DNS.
D: RADIUS is a networking protocol that delivers consolidated Authentication, Authorization, and
Accounting (AAA) management for users who connect and make use of a network service. It is not
specifically required for DNS.

http://en.wikipedia.org/wiki/BIND
http://en.wikipedia.org/wiki/RADIUS
http://en.wikipedia.org/wiki/Microsoft_Exchange_Serverhttp://en.wikipedia.org/wiki/Apache_HTTP_Server