Q1. Cybersecurity is also called "security of information technology". It is used mainly to:
A Connecting different computers together
B Sharing resources on the internet
C Stopping unauthorised access to various computers Correct
D Sending letters by post
Explanation
Cybersecurity is the practice of protecting computers, networks, data and information systems from unauthorised access, misuse, theft and damage. Its central purpose is therefore to stop unauthorised entry into computers and connected systems. Connecting computers is networking, not cybersecurity. Sharing resources on the internet is a general use of networks and online services, but it is not the main meaning of cybersecurity. Sending letters by post is a physical postal activity and has no connection with information technology security.