OCR GCSE Computer Science Keywords Set 1

Memory loses its data when power off

• Volatile
• Non-volatile
• Virtual memory
• Registers

Memory retains its data when power off

• Non-volatile
• Volatile
• Flash memory
• BIOS

A type memory that stores copies of frequently used data, much faster than RAM, lower capacity - closer to CPU

• Cache
• Read Only Memory (ROM)
• BIOS
• Flash memory

E.g., CD, DVD, Blu-ray

• Optical storage
• Magnetic storage
• Cloud storage
• Random Access Memory (RAM)

E.g., Hard drive

• Magnetic storage
• Solid State storage
• Optical storage
• Virtual memory

E.g., USB, flash memory, SD card

• Solid State storage
• Cloud storage
• Virtual memory
• Optical storage

Essential software that links the hardware and other software together and generally manages the computer system

• Operating System
• Defragmentation software
• Utility software
• Malware

Amount of data that can be transferred over a network in a given time

• Bandwidth
• Cache
• Clock speed
• Bit rate

Assigned to the NIC, unique identifier that cannot be changed, permanent, identifies the actual device on a network

• MAC address
• IP address
• Integer
• Hyper Text Transfer Protocol (HTTP)

Assigned either manually or automatically by a router or ISP, identifies a device on the internet or local network

• IP address
• MAC address
• File Transfer Protocol (FTP)
• Trojan Horse