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What is a network?

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Introduction

1) What is a "network"? A network is several computer systems linked together so that facilities such as printers, storage, computer programs, etc. can be shared. 2) What is "local area network" (LAN)? A local area network (LAN) is a group of computers linked together over one small geographical area, usually one building, an office in a building, or across a several buildings on one site. 3) What are "dumb terminals"? Dumb terminals are display and input devices which don't process data and input locally, instead transmitting input to a computer to which it is connected and displaying the resulting output. 4) What is a "server" and what does it do? The file server provides central disk storage for the users of a network. It identifies each user's file separately, and will not allow another user to access them. 5) What is a "web server"? A web server is a computer connected to the Internet. ...read more.

Middle

What is the "internet"? What did it used to be? The Internet is the world's largest wide area network and is often referred to as the network of networks. 10) What is the "world wide web" (www)? The world wide web is a part of the internet where a set of multimedia documents (documents that can consist of words, sound, video, images or animation) are connected by way of hyperlinks so you can move from one document to another with a mouse click. 11) What computer language are web pages written in? A webpage is written using HTML (hypertext markup language). 12) Connecting to the internet - what type of hardware device is a "modem" and what does it do? A modem converts the digital signals from a computer into analogue signals that can be sent down a phone line. These analogue signals are then converted back to digital signals by a modem at the receiving end. ...read more.

Conclusion

* You can create an address book of the e-mail addresses of all your friends. * You can create a distribution list. * You can send attachments of any file your computer. * If you want to attach a confidential file, you can add password to the file for security. * You can send copies of a message to many people. * You can forward e-mail you have received to other users. * Messages are automatically date and time stamped. * You can add a different signature to an e-mail, depending on the recipient. 18) List three other ways of accessing the internet. Mobile Phones; Personal Digital Assistants (PDA); Internet TVs or Set Top Boxes; Multimedia Kiosks. 19) What factors affect data transfer speeds when we are accessing the internet? The speed of your modem or the modem at the other end of the communication line; Your phone line; The size of the file being transferred; The amount of memory on your PC; The number of users online at the same time; The site you are visiting may be very busy; The amount of bandwidth available. ...read more.

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