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NETWORKING

NETWORKING. By: Nour Altounji 10DD. Network. A network is a collection of computers connected by communication channels that allows you to share information. http:// en.wikipedia.org/wiki/Computer_network. Standalone .

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NETWORKING

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  1. NETWORKING By: NourAltounji 10DD

  2. Network • A network is a collection of computers connected by communication channels that allows you to share information. http://en.wikipedia.org/wiki/Computer_network

  3. Standalone • Is a computer software that can work offline. It does not require a network connection. http://en.wikipedia.org/wiki/Standalone_software

  4. LAN • Local Area Network. Is a computer network that connects computers in a limited area. http://en.wikipedia.org/wiki/Local_area_network

  5. WAN • Wide Area Network. Is a telecommunication network that covers a broad area. http://en.wikipedia.org/wiki/Wide_area_network

  6. LAN Advantages Disadvantages Required to be on at all times Each computer can be easy to access for hackers\ The area covered is limited. • Easy to share devices (printers & scanners) • Easy to share data (homework, pictures) • Cost is low for LAN setup http://wiki.answers.com/Q/What_are_the_advantages_and_disadvantages_of_having_a_LAN

  7. Cabled LAN • Cabled networks are faster and more secure. But it is a lot harder to set up than wireless LAN. • unshielded twisted pair • Shielded twisted pair • Coaxial cable • Fibre optic cable http://www.astahost.com/info/tcmfl-wired-lan-wireless.html http://wiki.answers.com/Q/Different_types_of_cable_used_in_LAN

  8. Hardware that is essential for a computer to be connected to LAN • Router • Modem • Computer • Os system • Ethernet/fiber optics cables http://en.kioskea.net/contents/configuration-reseau/creer-reseau-local.php3

  9. LAN Topologies • The computers on a local area network must be connected via some way of networking medium. This medium serves as the channel where the network signal is transmitted. It must has an appropriate layout.

  10. 3 structures of topologies • Star topology: are all connected together • Ring topology: are all connected in a loop • Bus topology: connects all networked devices to a single continuous cable. http://homepages.uel.ac.uk/u0212068/topologies.htm

  11. BUS TOPOLOGY Advantages Disadvantages There’s a limit to the central cable length. The efficiency decreases as more devices connect. • It’s easy to set up and extended. • Not very expensive. http://www.ianswer4u.com/2011/05/bus-topology-advantages-and.html#axzz1u58hLmiQ

  12. STAR TOPOLOGY Advantages Disadvantages If centralized devices fails, the rest fail. The size is very limited. If the server is slow, the devices will be slow. • Easy to connect new devices. • Centralized management, easy to monitor all devices. • Failure of one device doesn’t affect the rest. http://www.ianswer4u.com/2011/05/star-topology-advantages-and.html#axzz1u58hLmiQ http://www.buzzle.com/articles/star-topology-advantages-and-disadvantages.html

  13. Wireless LAN • A Wireless Local Area Network (WLAN) allows a mobile device to connect to a local area network through wireless (radio) connection. http://searchmobilecomputing.techtarget.com/definition/wireless-LAN

  14. WAN • Wide Area Network is a telecommunication network that covers a broad are. • EG: Internet. A WAN is a network, which spans a wide area and transmits data using common communication links such as telephone lines, microwave links, and satellite channels. The Internet is the most popular and largest Wide Area Network.  http://en.wikipedia.org/wiki/Wide_area_network

  15. What is a Data Transmission • Is the physical transfer of data, through a specific route that is set for it. • EG: wireless communication channels, and the data is represented as an electromagnetic signal. http://en.wikipedia.org/wiki/Data_transmission

  16. Clients • Is an application or system that accesses a service made available by a server. http://en.wikipedia.org/wiki/Client_(computing)

  17. Server • A server is a computer program me running to serve the requests of other programs. http://en.wikipedia.org/wiki/Server_(computing)

  18. Client/server networks • Is a relationship between two programs. The client makes a service request. The server fulfills this request. http://searchnetworking.techtarget.com/definition/client-server

  19. Peer-to-peer network • Is a computer network where each computer in the network can act as a server or client, for other computers in the network, allowing information to be shared http://en.wikipedia.org/wiki/Peer-to-peer

  20. BANDWITH • The amount of bits allowed to pass through the network. Narrowband • One that does not exceed any peripherals

  21. BAUD • A unit of data transmission speed for a modem of one bit per second.

  22. simplex line • Refers to one way communication in which one side it’s the transmitter and the other is the receiver. Half duplex line • Refers to a two way communication where only one side can transmit data Full duplex line • Is a two way communication, both sides can transmit and receive data at the same time

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