Question: COMPUTER NETWORK AND CYBERSECURITY Q6 On the Transport Layer services are provided by the Transmission Control Protocol (TCP) and User Datagram Protocol (UDP). (a) What

COMPUTER NETWORK AND CYBERSECURITY

Q6 On the Transport Layer services are provided by the Transmission Control Protocol (TCP) and User Datagram Protocol (UDP).

(a) What is the difference in the service offered to applications by the TCP and UDP protocols? (8 marks)

(b) For each of the following applications determine whether you would use TCP or UDP and explain the reasons for your choice.

I. File transfer (3 marks)

II. Watching a real time streamed video (3 marks)

III. Web browsing (3 marks) IV. A Voice Over IP (VoIP) telephone conversation (3 marks)

(c) Both TCP and UDP use port numbers. What are these port numbers used for?

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