2.1. Types and methods of data transmission
A subsection of Computer Science, 0478, through 2. Data transmission
Listing 10 of 34 questions
The table contains descriptions about data transmission methods. Complete the table by identifying which data transmission methods are described. Data transmission method Description Data is transmitted down a single wire, one bit at a time, in one direction only. Data is transmitted down multiple wires, multiple bits at a time, in both directions, but only one direction at a time. Data is transmitted down a single wire, one bit at a time, in both directions at the same time. Data is transmitted down multiple wires, multiple bits at a time, in one direction only.
0478_w23_qp_12
THEORY
2023
Paper 1, Variant 2
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A company decides to create a network for its devices. All the company devices are within a single room. The employees will need to use their devices to send data to each other and share files. The company decides to send data across the network using packet switching. An employee sends an email to another employee. The email is broken down into packets. Describe the structure of a packet of data for the email. The company decides to use parallel full-duplex data transmission to send the data across the network. Explain the reasons why the company have chosen this method of data transmission. Give two drawbacks of the company using this method of data transmission. Give one other method of data transmission the company could have chosen.
0478_w24_qp_11
THEORY
2024
Paper 1, Variant 1
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The majority of mobile phones use touch screens. Three common technologies are used by different mobile phone manufacturers. Choose one of the following mobile phone technologies: • resistive • capacitive • infrared Chosen technology Describe how your chosen technology works to allow a user to make selections by touching the screen. Give one benefit and one drawback of your chosen technology when used on mobile phone touch screens. Benefit Drawback
0478_s15_qp_12
THEORY
2015
Paper 1, Variant 2
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Questions Discovered
34