2.1. Types and methods of data transmission
A subsection of Computer Science, 2210, through 2. Data transmission
Listing 10 of 20 questions
Three descriptions of data transmission are given below. Tick (✓) the appropriate box in each table to show the: • type of transmission • method of transmission Description 1: Data is transmitted several bits at a time down several wires in both directions simultaneously. Type Tick (✓) Method Tick (✓) simplex serial half-duplex parallel full-duplex Description 2: Data is transmitted in one direction only, one bit at a time, down a single wire. Type Tick (✓) Method Tick (✓) simplex serial half-duplex parallel full-duplex Description 3: Data is transmitted one bit at a time down a single wire; the data is transmitted in both directions but not at the same time. Type Tick (✓) Method Tick (✓) simplex serial half-duplex parallel full-duplex Give two reasons why serial transmission, rather than parallel transmission, is used to connect devices to a computer.
2210_s16_qp_12
THEORY
2016
Paper 1, Variant 2
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Five statements about serial half-duplex data transmission are shown in the table below. Tick (3) to show whether each statement is true or false. Statement true (3) false (3) Data is transmitted in one direction only, one bit at a time. Data is transmitted in both directions, multiple bits at a time. Data is transmitted in one direction only, multiple bits at a time. Data is transmitted in both directions, but only one direction at a time. Data is transmitted one bit at a time. Data is transmitted in both directions, but only one direction at a time. Data is transmitted multiple bits at a time.
2210_s17_qp_11
THEORY
2017
Paper 1, Variant 1
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Data can be transmitted from one device to another. Tick (3) one box to show which of the terms is not a method for transmitting data. A serial B simplex C parallel D parity Data is broken down into smaller units to be transmitted from one device to another. Give the name of the unit that data is broken down into. Data is often encrypted when it is transmitted from one device to another. Explain how data is encrypted using symmetric encryption. Give the purpose of encryption.
2210_s24_qp_12
THEORY
2024
Paper 1, Variant 2
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Maisey purchases a new router and attaches it to her computer. The connection she sets up uses duplex data transmission. Five statements are given about duplex data transmission. Tick (✓) to show if the statement is True or False. Statement True (✓) False (✓) Duplex data transmission can be either serial or parallel Duplex data transmission is when data is transmitted both ways, but only one way at a time Duplex data transmission is always used to connect a device to a computer Duplex data transmission is when data is transmitted both ways at the same time Duplex data transmission automatically detects any errors in data Maisey’s computer uses an integrated circuit (IC) for data transmission that sends multiple bits at the same time. State whether the IC uses serial or parallel data transmission. Maisey purchases a new printer and connects it to her computer using the USB port. Explain two benefits of using a USB connection. Benefit 1 Benefit 2
2210_w19_qp_12
THEORY
2019
Paper 1, Variant 2
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Blair writes a paragraph about data transmission in her Computer Science examination. Use the list given to complete Blair’s paragraph by inserting the correct five missing terms. Not all terms will be used. Terms can be used more than once. • duplex • half-duplex • parallel • serial • simplex data transmission is when data is transmitted a single bit at a time. data transmission is when multiple bits of data are sent all at once. If a user wants to transmit data over a long distance, with the highest chance of accuracy, data transmission should be used. If data needs to be transmitted in one direction only, for example from a computer to a printer, data transmission should be used. If a user has a large amount of data to transmit and this needs to be done as quickly as possible data transmission should be used.
2210_w19_qp_13
THEORY
2019
Paper 1, Variant 3
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Six statements are given about methods of data transmission. Tick (✓) to show if each statement applies to serial simplex, parallel simplex, parallel half-duplex or serial duplex data transmission. Some statements may apply to more than one data transmission method. Statement Serial simplex (✓) Parallel simplex (✓) Parallel half-duplex (✓) Serial duplex (✓) bits are transmitted along a single wire data is transmitted in both directions it is only suitable for distances less than 5 metres bits from the same byte are transmitted one after the other data may not arrive in the correct sequence data is transmitted in both directions, but only one direction at a time A Universal Serial Bus (USB) connection can be used to transmit data from a mobile device to a computer. Give three benefits of using a USB connection for this purpose. Benefit 1 Benefit 2 Benefit 3
2210_w21_qp_12
THEORY
2021
Paper 1, Variant 2
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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.
2210_w23_qp_12
THEORY
2023
Paper 1, Variant 2
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Questions Discovered
20