AQA A Level · Computer Science 7517

The Internet and Internet security: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on The Internet and Internet security.

10 questions26 marksFree, no account

Question 1

1 mark

In the context of the structure of the Internet, which device is primarily responsible for directing data packets across different networks based on their IP addresses?

Question 2

1 mark

How does Asymmetric Encryption provide a mechanism for digital signatures to ensure non-repudiation?

Question 3

1 mark

When a web browser requests a page via HTTPS, it involves the Domain Name System (DNS). Which of the following best describes the role of the DNS in this process?

Question 4

1 mark

What is the primary function of a Gateway when connecting two networks?

Question 5

1 mark

When using Network Address Translation (NAT), how does a router typically track which internal host should receive a returning packet from the public Internet?

Question 6

2 marks

What is the primary role of a gateway when routing packets across the Internet?

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Question 7

4 marks

Compare symmetric and asymmetric encryption in the context of securing Internet communications.

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Question 8

6 marks

Describe how a digital certificate is used by a web browser to verify the identity of a website during a TLS handshake.

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Question 9

5 marks

The Domain Name System (DNS) is essential for the functioning of the Internet.
a) Explain the purpose of a Fully Qualified Domain Name (FQDN).
b) Describe the step-by-step process a client follows to resolve a domain name to an IP address if the local DNS cache is empty.

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Question 10

4 marks

A firewall is a critical component of Internet security. Compare packet filtering and stateful inspection. Which method provides higher security and why?

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