Computing Principles

What is penetration testing and why is it important for network security?

Give one advantage and one disadvantage of using wireless connections instead of wired ones. Then explain why encryption is especially important in wireless networks.

Explain what happens when you type a URL into your browser until the correct website appears.

Explain three different ways to protect a network from unauthorised access or attack.

Identify the type of malware described in each of the following scenarios: A. Slows a computer down by endlessly replicating B. Pretends to be a useful program but causes damage C. Secretly records your keystrokes D. Bombards you with unwanted advertisements

Describe two ways to reduce the risk of a brute force attack. Then explain how one of them works.

What is phishing, and how does it trick users?

Data is broken into packets when sent over a network. For the following components, explain their purpose in the packet: – Destination address (in the header) – Sequence number (in the header) – Return address (in the header) – Checksum – Data

List three advantages of using a Local Area Network (LAN).

Give one key difference between a LAN and a WAN. Then give one example of each.