Networks

Question 1

What is penetration testing?

Answer 1

When a penetration tester identifies vulnerabilities in network security which could be exploited by a hacker, using methods that simulate a hacker or a malicious insider.

Question 2

How can networks be protected?

Answer 2

Access control - authentication and user permissions

Physical security - Locked access doors, RFID tags in equipment, Swipe cards, CCTV

Firewalls - monitor internet traffic and stop unwanted traffic entering the network, or being accessed via the network.

Question 3

Network speed formula -
time =

Answer 3

(file size in bits) / (transmission speed)

Question 4

What is latency?

Answer 4

The delay between data being sent and being recieved.

Question 5

What is bandwidth?

Answer 5

The maximum amount of data that can be transferred across a network in one second.

Question 6

What is range?

Answer 6

The distance data can be sent over a network before starting to degrade.

Question 7

Speeds for:
1. Copper cables
2. Fibre optic

Answer 7

1. 10 gbps
2. 100gbps

Question 8

3 Benefits of packet switching

Answer 8

If one router/device fails, data can be sent by another route

A path to the recipient device doesn’t have to be established so data can be sent immediately.

It is more secure as if intercepted, only part of the data will be gained.

Question 9

What are 3 things that could signify a phishing email?

Answer 9

Spelling and grammatical errors

Doesn’t say the person’s name its sent to

Makes you feel as if you need to click a link immediately to avoid something bad happening