Which of the following active offsite storage backup facilities is continuously connected to the primary server?

A.
Hot site

B.
Warm site

C.
Cold site

D.
All of the above

Explanation:
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. A hot site is typically used to perform constant mirror operations of the specific primary server.
Incorrect
Answers:
B: A warm site is not continuously connected to the primary server like a hot site. It does though have wide-area networking and other basic communications assets, which is not typical of a cold site.
C: A cold site, like a warm site, is not continuously connected to the primary server. A

cold site does not have wide-area networking and other basic communications assets.
Cold sites usually only contain equipment for performing backup and restore functions.
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.