Network Security Threats

Question 1

What do firewalls do?

Answer 1

Filter all network communication in and out of the network.

Question 2

What are two types of firewalls?

Answer 2

Software and Hardware

Question 3

How do firewalls work?

Answer 3

A series of rules are setup and applied to traffic and if any traffic fail the rules it is blocked. Prevents unauthorised traffic in and out of the network.

State-fall packet inspection can scan the contents of each packet as it crosses the firewall, if any patterns in the packet are spotted that match a signature of a known virus they can be rejected.

Question 4

What is a proxy?

Answer 4

A proxy is simply another physical computer placed between a network and a remote source.

Question 5

How do proxies work?

Answer 5

All traffic passes through this computer on its way both in and out of the network. A proxy makes sure there is no direct physical connection between a user and a remote source.

Question 6

What is encryption?

Answer 6

A method of transforming into an unintelligible way. So that it cannot be ready by unauthorised individuals.