You are the Certkiller administrator charged with upgrading the NOS of the Certkiller server, which of the following actions should be performed before upgrading or beginning a fresh install of the NOS?

A.
Backup the current system and check the backup using system restore

B.
Install the update and then run a system backup

C.
Have a backup copy of the current NOS ready for fresh installation

D.
Make sure the Certkiller server board is compatible with the NOS

Explanation:
The process of upgrading a server NOS must be started by creating a current system backup and testing the current system backup’s restore function.
Incorrect
Answers:
B: Installing the update first and creating a backup later is not the proper order of steps and will result in you being unable to restore your server in case of emergency.
C: If you were clever and created a current system backup you will avoid the hassles of having to perform a new fresh installation.
D: This is an important step but it is not the first step to be performed when upgrading the servers NOS.
Reference:
Server+ Exam Cram 2 (Exam SK0-002), Charles J. Brooks, Que, November 2005, pg