Network Security

Question 1

Virus

Answer 1

A embedded program intended to cause damage to a PC. It copies itself onto the disk and hides itself. It
attempts to duplicate itself and spread to other computers.

Question 2

Worm

Answer 2

A virus but it is contained within its own program.

Question 3

Trojan

Answer 3

A non-self- replicating virus hidden in a downloaded file, and unleashed on execution.

Question 4

Ransom Ware

Answer 4

A trojan /worm that encrypts data and then charges the owner to decrypt it.

Question 5

Firewall

Answer 5

The purpose of a firewall is to control the traffic flowing in and out of a network. It can be hardware or software based, and sometimes is a
combination of both. It can be setup to block individual website addresses or specific computers.

Question 6

Proxy Server

Answer 6

If a user requests a service from the network, it is first passed to the proxy, before the proxy server then
performs the request on the behalf of the network user. If the resource is banned the request can be rejected,
There is never any direct contact between user and resource, as the proxy acts as a “ middle man”.

Question 7

WPA / WPA2

Answer 7

It requires you to enter a
password when accessing a
network. It acts as layer of
protection.