Which of the following active offsite storage backup facilities is used to perform constant mirror operations of the primary server?

Which of the following active offsite storage backup facilities is used to perform constant mirror operations of the primary server?

A.
Hot site

B.
Warm site

C.
Cold site

D.
All of the above

Explanation:
A hot site is used to perform constant mirror operations of a specific primary server. A hot site is an active offsite storage backup facility that is continuously connected to the primary server. The connection can take the form of a direct or remote connection.
Incorrect
Answers:
B: A warm site is not continuously connected to the primary server like a hot site, and therefore cannot be used to perform constant mirror operations of the specific primary server.
C: A cold site is not continuously connected to the primary server like a hot site and

cannot be used to perform constant mirror operations of the specific primary server.
D: A hot site is the correct answer.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 549-551.