Computer systems

Software

Communication Protocol

Set of rules describing how to transmit data across a network

http

hypertext transfer protocol

TCP

Transmission control protocol

IP

Internet protocol

Use for http

It allows a client to issue a request for a resource (such as a web page) and the server to respond to the right computer with the data or resources required.

Use for https

Data transmitted between the client and the server is automatically encrypted.

Use for TCP

Operates at the transport layer, ensuring the binary code is transported reliably between computers.

Use for IP

Operates at the network layer. This protocol handles the creation of the data packets and how they routed around the network to their destination.

TCP

Keeps track of the packet of information and makes sure that they arrive error free and in the correct order.

VOIP

Voice over Internet Protocol

Use for VOIP

A number of methods, which are designed to deliver voice data. (e.g video)

Internet

Global network for computers

Internet hardware components

• Gateway

• Routers

• Network bridges

• Switches

• Repeaters

Gateway function

Connect two networks that have different protocols, for instance, two different networks in an organisation.

Routers function

Forward data packets between computer networks e.g home routers forward data between the internet to the home computer.

Network Bridges function

Create a single network from multiple network segments

Network Switches function

Forward data only to the devices that need to recieve it

Repeaters function

Receive data and re-transmit it.