A security mechanism that can be created in hardware and software both to prevent the unauthorised access to and from a network is called ……………

1. Anti-virus
2. Network security
3. Authentication
4. Firewall

Unauthorised electronic junk mail is called ……………

1. Trojan horse
2. Worm
3. Spam
4. Computer virus

A program capable of replicating itself and eating up all the memory is a ……………

1. Trojan horse
2. Worm
3. Spam
4. Computer virus

What out of the following, will you use to have an audio-visual chat with an expert sitting in a far-away place to fix-up a technical issue?

1. VoIP
2. email
3. FTP