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A computer network comprises anumber of peripheral computers and associated devices interconnected via anumber of routing and switching devices over a number of communications channels.The aim of a computer network is to allow computer devices to share common resources and information.

Computer Networks carry data in many kinds of environments, including homes, small businesses,and large companies and corporations. There are four major categories of physical components in a computer network: the computers and servers, interconnections, switches, and routers.

The computers themselves provide the user with an interface to the network over which to run their applications such as email, File Transfer,Collaberation, Instant Messaging, Voice and Media over IP as well as the ability to access websites through the use of HTTP.

Servers allow a user to host a particular service such as a website,email system, information service or storage system.

Interconnections fall into two categories, Wired and Wireless. Wired connections are normally through the use of copper twisted pair cable, or in the case of Cable Modem systems, coaxial cable. Fibre optic cable is becoming more and more popular due to its high bandwidth capability and its virtual immunity from Electromagnetic Interference.

Wireless interconnections are usually governed by the IEEE 802.11standards and users will normally access a wireless network by means of a Wireless Router or Wireless Access Point.

Data switches interconnect users through use of the Ethernet protocol and provide dedicated ports for each user device. Some switches are very sophisticated devices that allow configuration of security features, virtual local area networks (VLANs) and Quality of Service (QoS) features.

Routers provide the logical and physical interconnection between different networks and are used to route the data packets carrying the user'sdata, and also police the network through inbuilt, configurable security features.

Here at www.ipexpress.co.uk , we have most computer network components for sale including Routers,Ethernet switches, firewalls,Network adapters, Webcams,Printservers, Network storage servers, RAID controllers, Network servers, and IP cameras.

 Most items are availablewithin a 2-4 day delivery timescale.