O-LevelComputer ScienceData Transmission2210/11 · May/June 2024 · Q47 Marks

Data packets are transmitted across a network from one computer to another computer.

(a)Describe the structure of a data packet.[3]
(b)Packet switching is used to transmit the data packets across the network. Identify the device that controls which path is taken by each data packet.[1]
(c)Serial data transmission is used to transmit the data packets across the network. Explain why serial data transmission is used to transmit the data packets.[3]

Mark scheme

Marking points from the official mark scheme (May/June 2024). The mark or mark type is shown in brackets.

[3] 4(a) Any three from: A packet is split into three different sections; ...the header; ...the payload; ...the trailer
[1] 4(b) Router
[3] 4(c) Any three from: The network may be spread over a long distance ... so it is more reliable; Bits will be sent/arrive in sequence ...so bits less likely to be skewed; Less crosstalk/interference ...so less likely to have errors; The data may not need to be transmitted at a fast speed // data transmission speed of serial is adequate; The cables in the network only use serial transmission

On Oracle Prep you can write or photograph your own answer and have it marked by AI against this mark scheme, with feedback on what you missed.

Topic: Data Transmission, O-Level Computer Science (syllabus 2210). Structured question, 7 marks.
Source: O-Level Computer Science, May/June 2024 Paper 1 Variant 1, question 4.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content