What is computer security?
The protection of computer's data, information, softwareand hardware from being damagedor lost is calledcomputer security.
Why do we need to backup data and software?
The backup system helps to make the duplicate copy of data & software. If data and software get lost or damaged due to fluctuation of electric voltage, power failure , viruses or intentional then backup system helps us to recover the lost or damaged data or software from the backup copy of data and software. Hence, we need to backup data and software.