INTERNET EXPLORER:
Internet Explorer: Is a (global world wide) connect of computer network. These computers are connected verve huge network of telecom links both wire and wireless connection. Examples. Telephone lines (satellite) OR Is a set of interconnected computer network.Server or Host Computer.All computers are connected by means of server or host computer.They have to speak same language in order to communicate. HOW INTERNET EVOLUED Internet came into existence in 1960’s during the called war ere. The British government suggested the system with no center for control (developed by Baron Paul such that even if part of the network is destroying the packets containing the information can still be passed through other path and reach it’s intended destination this was later used by the U.S department defence and other universities at first was named ARPANET (A trace Research Project Agency Network) PERSONNALITY World Wide Web (www) was intended by tin Bernas lee Network without a center was developed by a man called Paul Baram. WHAT MAKES UP THE INTERNET?
Interconnection of internet. v Host/ Server computer v Connectivity devices Like. v Modem (Modulation and Demodulation).v Routers, set light disk, cable,(Lives lines/ (NICS) Network information centers SERVER/HOST COMPUTER. Host computer. Is a computer on the internet which provides information to others such as documents, videos graphics, files images etc. ROUTERIs device joins telecommunication links and group of computer together. CLIENTS:Is computer that accessed information from the server. PROTOCALS:Refers to the standard of communication between computers or host on a network. DOMAIN NAME:Is name a sign to computer and includes the organization name, type of the organization service or product and the geographical location (country) BASIC STRUCTURES OF DOMAIN NAME. v Host name (server name)v Organization name v Type of the organization.v Country name (country suffix). WWW. MUBS. AC. UG
Server name Organization name Type Country suffix /Country name radaruth@yahoo.com
UserName at Server Commercial site Name radaruth@yahoo.com. DESCRIPTION The username radaruth is at a server name known as yahoo which is a commercial site radaruth@yahoo.co.uk Means: The username radaruth is at a server name known as yahoo which is a company in the United Kingdom. MODEM.Is a connectivity device that allow a computer to used a telephone lines to a remote network OR. (ISP) internet service provider .from a remote site since it convert analog signal to digital and vise versa. SOME OF THE SERVICES PROVIDED BY INTERNET. (APPLICATION) 1. E-mails. (Electronic mail).2. File transfer by use of file transfer protocols (FTP)3. Gopher (graphical document) has been replaced by www.4. Usenet news. Which permit discussion (Question $ Answers on time)5. World Wide Web (www)Accessed using: WEB BROWERS E.g.-internet Explorer Netscape. HOW COMPUTER ON NETWORK US IDENTIFIED ü Unique domain name (www.mubs.Ac.ug)ü Unique numerical address called the I.P address is controlled by a special company or a domain Registry C.F.I for the case of Uganda. WHO CONTROLLED THE INTERNET ü No one ü Telecommunication Company owns the infrastructures or the linksThrough Certain governing bodies that over sees certain parts of the internet e.g. such bodies includes.1. Domain name, I.P. addressed locater e.g. inter NIC which has a world wide responsibility.2. RFC’S (request 4 comments) Handles comments on standard or news services on the net HOW TO ACCESSDED THE INTERNET. Ø Online service offered by organization like Africa on line, MSN, America on line and the computer server. Ø Individual dial up.Through installing dial up network it is promoted by inter service provider (I.S.P) e.g. of I.S.P. v INF Comv MTNv MANGO etc. Ø LAN ACCESS. (LOCAL AREA NENTWORK)By connecting LAN server to the internet and the various computers on the Local Area Network fitted with a modem of his accessed to the internet resources. I.S.P’s These are companies that provide you with access to the internet which can either be through a dial up connection using modem / using I S P connection which all go with charging alliance through a flat free rate exist ( unlimited $ data amount of any type such as graphics, audios and animated images. WORLD WIDE WEB (WWW) Is a connection of host computers that delivered documents, graphics and multimedia to users via internet with hid of a protocol called http.Http means hyper text transfer protocol. ADVANTAGES OF WWW Ø Linking document together using hyper link.Ø Simplifying document creations and multimedia, ensuring it’s availability to users.Ø Support multimedia document of various component like text graphics videos, audio (sound) on single document.Ø Access to any one connected to the net with web browers Ø Easy to publisher and share information globblyØ Easy navigation through hyper linking. WEB BROWER. Is a software program that interprete documents that you request for from a web servers on the www and later displays it for viewing. EXAMPLES. ü Internet explorerü Netscape communication.ü MS outlook. WEB PAGES. Are documents stored on web server and are written in a special language called HTMC. HTMC being a programming language that enables you to create and link together various pages and to specify every details of how the page looks when viewed through the brower. WEB SERVER. Refers to a computer that provides documents and other multimedia like video, sound, Graphics etc using the HTTP protocol and these documents are called web pages.OR.A computer that provides the network N/W resources to other computers on a network. HOW WEB SERVERS WORKS: Ø Viewed using web browersØ Can contain graphics, sounds, movies and other media rich contents.Ø Link to other pages on the same server or another web servers.Ø Request is made through the brower to the www server and the connection is ensured by the HTTP.Ø The www server service the request locates the web page and sends it to the web brower.Ø The connection between the web brower client and the www server is then released.Ø The browers then interprete the web page and formats it on the client computer screen. HYPER LINK. Is the link to another HTMC document or resources and is always shown in blue and underlined which when clicked, the client browers gets the associated file. URL (uniformed resource location)Is where people can be found on the internet. It’s actually a path name for any resources on the internet. It comprises of: - Protocol part
- Host part
- Document name.
Format of URL always type in the URL bar-with a drop down for various addresses i.e. URL box. Http:// www.mubs .ac. Ug / index.html.
Protocol Host part Document name $Nature (DNS)
