OCR computing NETWORKS GCSE

Bandwidth

Bandwidth is the amount of data that can be transmitted in a given period of time

Router (purpose)

To transmit data between at least two different networks

Web server role

Control access to a centralised resource (definition of a server)

Stores content for web pages

Stores layout data for web pages

Receives and processes requests for web pages

Web client role

Sends requests for web pages

Sends DNS requests for IP addresses

Displays the results of web requests

protocol

A set of rules that govern how devices communicate

What is the protocol that is used to transmit data between different networks

TCP/IP

HTTPS?

Transmits data using encryption

MAC address

A MAC address is permanently assigned to a device on the network

IP address

An IP address may change when the device joins a different network

What is the purpose of **POP3**?

to retrieve emails. They are deleted once downloaded from the server