IGCSE Computer Science Paper 1 Word Scramble: 2.1 Data Transmission Types and Methods (Modules 131–141)
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Word scramble
Unscramble the letters and write each key term on the line.
1
LEMXIPS
Data transmission in one direction only, from sender to receiver, with no reply possible. Example: a keyboard sending key presses to a computer.
2
FUAD-XEHLPL
Data can travel in both directions, but only one direction at a time, so devices take turns, like a walkie-talkie.
3
UPFL-ELUDLX
Data is sent in both directions at the same time, so both devices can send and receive at once, for example during a telephone call or over a broadband connection.
4
CIONETDRI EFARF-ODT
Simplex is one-way only but simple and has no collisions. Half-duplex is two-way by turns, so slower. Full-duplex is two-way at once and fastest, but needs more capacity and costs more.
5
SSINOARMSTIN DMEOTH
Pick the direction (simplex, half-duplex or full-duplex) and the bit arrangement (serial or parallel), then justify both using the scenario's distance, speed and two-way needs.
6
BSU
Universal Serial Bus: a standard interface for connecting devices like keyboards, drives and phones to a computer and transferring data between them.
7
LPGU NAD APLY
When a USB device is plugged in, the computer automatically detects it and loads the driver it needs, so the device works straight away with no need to restart.
8
BUS RTSADNAD ENROTNOCC
A USB port and plug of a set shape and wiring, so one cable type connects many different devices to a computer, such as a keyboard, a printer or a phone.
9
BUS TNBESFIE
One standard connector fits many devices, devices are detected automatically, older devices work in newer ports, power comes through the cable, and fast serial transfer is used.
Answer Key
IGCSE Computer Science Paper 1 · Modules 131–141
1LEMXIPS → simplex — Data transmission in one direction only, from sender to receiver, with no reply possible. Example: a keyboard sending key presses to a computer.
2FUAD-XEHLPL → half-duplex — Data can travel in both directions, but only one direction at a time, so devices take turns, like a walkie-talkie.
3UPFL-ELUDLX → full-duplex — Data is sent in both directions at the same time, so both devices can send and receive at once, for example during a telephone call or over a broadband connection.
4CIONETDRI EFARF-ODT → direction trade-off — Simplex is one-way only but simple and has no collisions. Half-duplex is two-way by turns, so slower. Full-duplex is two-way at once and fastest, but needs more capacity and costs more.
5SSINOARMSTIN DMEOTH → transmission method — Pick the direction (simplex, half-duplex or full-duplex) and the bit arrangement (serial or parallel), then justify both using the scenario's distance, speed and two-way needs.
6BSU → USB — Universal Serial Bus: a standard interface for connecting devices like keyboards, drives and phones to a computer and transferring data between them.
7LPGU NAD APLY → plug and play — When a USB device is plugged in, the computer automatically detects it and loads the driver it needs, so the device works straight away with no need to restart.
8BUS RTSADNAD ENROTNOCC → USB standard connector — A USB port and plug of a set shape and wiring, so one cable type connects many different devices to a computer, such as a keyboard, a printer or a phone.
9BUS TNBESFIE → USB benefits — One standard connector fits many devices, devices are detected automatically, older devices work in newer ports, power comes through the cable, and fast serial transfer is used.