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Question 1[4 Marks]
Explain how the OSI model helps with abstraction.
Question 2[3 Marks]
Explain how the use of media access control (MAC) addresses can improve security.
Question 3[13 Marks]
A bank has designed a new online banking service for both their local and international customers. Data will be sent around the world using secure protocols to ensure client banking details are kept safe.
Define the term 'data packet'.
Outline how protocols enable successful network communication.
The bank advises that customers do not use the online banking service on public Wi-Fi due to security risks.
With respect to online banking on public Wi-Fi, outline one security risk.
Describe two critical devices required for a public wireless network to function.

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