Yr10 February Mock - QFocus

Cache Size

Affects CPU performance by enabling faster data transfer compared to RAM.

Efficiency of CPU

Increased by the faster data transfer from cache.

Register

A small amount of storage available directly in the CPU to store instructions.

Accumulator Register

Stores the result of arithmetic operations.

Sampling

The process of measuring the height of a wave at regular intervals.

Binary

A system of representing information using only two options, typically 0 and 1.

Character Set

The collection of different characters that a computer can represent.

ASCII

A character encoding standard that represents 256 different characters.

File Size Calculation

To determine the size of a text file: characters * 8 bits = total bits, total bits / 8 = total bytes.

Compression

A method to reduce file size for images and videos.

Router Responsibilities

Includes receiving, forwarding packets, maintaining routing tables, and assigning IP addresses.

Protocol Layers

Divide functions so that they can be developed independently.

IPv4 Address Format

Consists of 4 groups of denary numbers between 0 and 255, separated by full stops.

IPv6 Address Format

Composed of 8 groups of hexadecimal numbers, separated by colons.

MAC Address Format

Normally presented in hexadecimal, consisting of 6 groups of 2-digit numbers.

Manufacturer ID

The first half of a MAC address, identifying the manufacturer.

Encryption Purpose

To make data unintelligible if intercepted and to restrict access to authorized users.

DPA

Data Protection Act; legislation outlining data handling requirements.

Router

A device that forwards data packets between computer networks.

Network Security

Protection of networks from unauthorized access or attacks.

Data Interception

The unauthorized collection of data as it is transmitted over a network.