1. By Kyle Slinger

2.  A network is where you can send information to and from different PCs

3.  You can plug lots of PC’s into hubs and switches but there is a difference. Hubs send information from your PC to all the PCs on that network whereas switches just send information to individual PCs on the same network.

4.  LAN is a small area of computers all connected together on the same network.

5.  A lot of computers all connected together on the same network.

6.  A server is a dedicated computer that stores all of the information off the PCs on that network.  With a proxy server you can get around security restrictions by using another IP that is not yours.

7.  A cable that travels information at the speed of light.

8. ◦ Everybody’s internet has there own unique IP address. ◦ IP addresses are typically made of four 8-bit numbers. ◦ They usually look something like this: 192.168.0.1

9.  A firewall is a filter that stops bad information coming into your PC. It has words that it looks for and if they try to come into your PC it will stop them.

10.  URL stands for acronym resource locator and is used to find things on the internet.  A Domain Name represents IP addresses because it is easier than remembering IP addresses.

11.  WLANs are LANs which are spread over a wide area.  A PAN is a network of your personal devices e.g. phones and laptops.

12.  Networks are very important, especially in businesses for the following reasons:  File sharing  Printer sharing  Communication and collaboration  Organisation  Remote access 

13. They can be very expensive Managing a large network is complicated If the server breaks down the files become inaccessible unless you have a backup Viruses can spread through networks There is a danger of hacking.

14.  You can get a firewall to stop malicious software etc. from getting to your PC.  You can use software like smooth wall which detects words and explicit images coming to a PC and stops them.  Make sure you log out.

15.  Intranet is a network of computer networks and computers using unique IP addressed ad TCP/IP protocol.

16.  The WWW is a system of interlinked hypertext documents accesed via the internet

17.  The intranet is a private computer network that used internet protocols

18.  Domain name servers are the equivalent of a phone book. They change domain names into IP addresses.

19.  HTTP stands for Hypertext Transfer Protocol.  HTTP is the foundation of data communication in the world wide web.  Hypertext is structures text that uses logical links between nodes and containing text.

20.  URL is the generic term for all types of names and addresses that refer to objects on the world wide web.  The term web address is a synonym for a URL hat uses the HTTP/HTTPS protocol.

21.  URN stands for Uniform Resource Name. It is a string of characters used to identify the name of a web resource.  A URN looks something like a URL

22.  ISP stands for internet service provider. It is a company that provides you with access to the internet, usually for a fee.

23.  In a peer to peer network all computers are equal. Every user is a network administrator and has to control there own machine. Access can be given to anyone else on the network you just give them a password.  A peer to peer network will often make use of a hub in order to connect the computers

24.  Client servers are the commonest network model in medium to large organisations.  One or more computers are designated as servers. These provide services to the rest of the machines on the network.

25.  A bus network has a single backbone cable and all the devices are attached to it.  When a message is sent, it is divided into chunks and sent in both directions along the cable. All the computers on the network receive it.

26.  The devices are arranged in a circle. Each computer is responsible for passing the message on.  One way to implement a ring network is by token passing, with this a packet called a token passes from one computer to the next.

27.  This is the most common way to set up a network. All connections are to a central device such as a wiring cabinet with switches.  Installation of a star network is labour intensives the cable often has to go through walls and ceilings or under floors.