The internet

3. a server on a network where central files and other data are stored. They can be accessed by a user logged onto the network.
4. network covering a very large geographical area.
5. wireless connectivity that uses radio waves in the 2.45GHz frequency band.
6. device used to boost a signal on both wired and wireless networks.
8. (also known as domain name system) is a system for finding IP addresses for a domain name given in a URL. (3 words)
9. network covering a small area such as a single building.
12. device that connects LANs which use different protocols.
13. type of cable in which two wires of a single circuit are twisted together. Several twisted pairs make up a single cable.
17. remember a user’s log in details (so that they can authenticate the user’s browser). They are stored on the hard drive of a user’s computer until the expiry date is reached or the user deletes it. (2 words)
19. are software that allow users to access and display web pages on their device screens. (2 words)
20. hardware used to connect together a number of devices to form a LAN that directs incoming data packets to all devices on the network (LAN).
21. method of data storage where data is stored on off-site servers.
22. are used, for example, when making online purchases. They keep a user’s items in a virtual shopping basket.(2 words)
23. network made up of a combination of other network topologies.

1. hardware used to connect together a number of devices to form a LAN that directs incoming data packets to a specific destination address only.
2. network which is larger than a LAN but smaller than a WAN, which can cover several buildings in a single city, such as a university campus.
4. wireless LAN.
7. modulator demodulator. A device that converts digital data to analogue data (to be sent down a telephone wire); conversely it also converts analogue data to digital data (which a computer can process).
10. wireless connectivity that uses radio waves, microwaves. Implements IEEE 802.11 protocols.
11. – network that uses separate dedicated servers and specific client workstations. All client computers are connected to the dedicated servers.
14. situation in which the same data is stored on several servers in case of maintenance or repair.(2 words)
15. device which enables data packets to be routed between different networks (for example, can join LANs to form a WAN).
16. These cards allow devices to connect to a network/internet (usually associated with a MAC address set at the factory.
17. network in which each node can share its files with all the other nodes. Each node has its own data and there is no central server.
18. are small files or code stored on a user’s computer. They are sent by a web server to a browser on a user’s computer.