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Computer networks

A computer network is a set of computers connected together for the purpose of sharing resources. Types of computer network are:
LAN - Local Area Network.
WAN - Wide Area Network.
WLAN - Wireless Local Area Network.
MAN - Metropolitan Area Network.
SAN - Storage Area Network, System
Area Network, Server Area Network, or sometimes Small Area Network.
Routers generate networks and switches share them. Networks are classified into intranet and internet: the internet is mostly referred to as the global connection of networks. Intranet are LAN and WAN. Intranet is the connection found in school and offices. Mobile phone hotspot is also an intranet.

How browsing the internet works

They must be a network connection for browsing to take place. The rules that guide communications among device connect to the internet is called Internet Protocol. Each system connected to the internet has an IP address e.g Types of Protocols are HTTP(HyperText Transfer Protocol), FTP(File Transfer Protocol), STMP(SigmaTel chipset series; Simple Transportation Management Protocol) and RTSP(Real Time Streaming Protocol.)

Browsing is asking request as a client and getting response from the connected server.Examples of servers include: HTTP server, FTP server, Mail server Media server and more.


The web comprises of clients and web servers. Client use their internet browsers e.g firefox, The table below show the various technologies used to build the web and their functions.










HTML-Hyper Text Makeup Language




is used

to design webpage which

PHP: (Powerful Hypertext Processor) is



comprises of tags, attributes and the

open source.JSP: Java Server Pages



values. It is the visible part of webpages.

ASP or ASP.NET: Active Server Pages



CSS- Cascading Style sheet for styling.

of Microsoft with













support.Ruby-on-Rails, PYTHON,



JavaScript- Programming that runs of







PERL, ColdFusion e.t.c



client browser for interactivity.



Flash: For dynamic and responsive.










Applet: Run java programs

Database: MySQL, MSQL, MS









Access, Postgre, Oracle, SQLite, XML



See: www.w3schools.com for more




FTP Servers, Mail Servers