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Network

Network. Chongseok Park 10DD Mrs. Veena Mony. Content. Contents. Network Standalone LAN (Local Area Network ) Advantages/Disadvantages of LAN Cable LAN (Local Area Network) & Types Router WAN (Wide Area Network) Client Server Client/Network Server Peer to Peer Network

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Network

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  1. Network Chongseok Park 10DD Mrs. VeenaMony Content

  2. Contents Network Standalone LAN (Local Area Network) Advantages/Disadvantages of LAN Cable LAN (Local Area Network) & Types Router WAN (Wide Area Network) Client Server Client/Network Server Peer to Peer Network Line/Bus Topology Star Topology Advantages/Disadvantages of Star Topology WLAN (Wireless LAN) Data Transmission Bibliography

  3. Network • A computer network is a group of more computers connected to each electronically, consisting in a server. • This allows files easily to be shared. Usually, this means that the speed of the connection is faster than a normal connection to the Internet. Also can share hardware devices such as: Printer. Some basic types of computer networks include: A local area network, An "internetwork“. Content

  4. Standalone • A Standalone server is a type of server that is not part of a larger network infrastructure such as an Active Directory domain. • In a general sense, a standalone server provides services to clients without relying on any external resources, including authentication. These devices can be such as a fax which does not need any server to have a control. Content

  5. LAN (Local Area Network) • LANs are confined to a small area, like within a building or several, it’s messages are sent between terminals and this is very useful for sending memos between offices. • LAN can be used in schools, home offices etc. Content

  6. LAN (Local Area Network) Advantages Disadvantages Regional area coverage is limited When a file developed a fault, all the users in a server will be affected. Special security program is needed to prevent users accessing into programs and data which is restricted. It is difficult to setup and needs maintenance regularly • Easy to share devices, such as (printers, scanners, external drivers) • Easy to share data (homework, picture) • When a new version is introduced, it only has to be loaded onto the server instead of onto every workstation • Cost of LAN setup is low Content

  7. Cable LAN (Local Area Network) & Types • Cable LAN are used to connect one network device to other or to connect two or more computers to share devices such as printer, scanner etc. • Types of cabled LANs: • Twisted pair – a form of wiring which a twisted conductors are used and used in homes and offices • Coaxial cable – uses electromagnetic waves inside the cable and is used for TV • Optical fiber – the latest form cable LAN of transferring light pulses that is provided by the ISPs which is made out of very thin material of glass. Content

  8. Router • A router enables to transmit data such as internet between the computer networks. Content

  9. WAN (Wide Area Network) • WANs cover a wide geographical area. This can link computers in different countries using satellites, microwaves or telecommunication links. • WANs are usually built through leases lines and routers are used to connect the network at one place to the network at other place. • Example, A company has a network in the USA. The company wants to open its office in UAE. In order to connect the two offices in the USA and UAE, we have to install routers at both ends for communication. Content

  10. Client • A client is an application or system that accesses a service made available by a server. Content

  11. Server • A server is a computer that serves many things to user, or client machines. Usually a server will only do a few things. • Every type of thing a server does is called a service. Services are used by other computers that are called clients. The relationship between the client and the server is called a client-server relationship. Content

  12. Client/Network Server • A network client/server is a computer that provides various shared resources to workstations and other servers on a computer network. • The shared resources can include disk space, hardware access, and email services. Content

  13. Peer to Peer Network • In its simplest form, a peer-to-peer (P2P) network is created when two or more PCs are connected and share resources without going through a separate server computer. • A P2P network can be an ad hoc connection—a couple of computers connected via a Universal Serial Bus to transfer files. Content

  14. Line/Bus Topology • Computers are connected to a main cable. If a data is sent between computers then other computers cannot transmit. If there are too many computers are connected then the speed of transmitting data will be slower. Advantages of line/bus topology: • The wiring complexity is low. • An economical and easy to manage twisted wire pair serves as the transmission medium. Content

  15. Star Topology • A central server usually forms the main computer and the subsidiary computers are connected to it and to each other through a switch or hub. Content

  16. Star Topology Advantages Disadvantages Uses the most cable which makes it more expensive to install than the other two topologies. The extra hardware required such as hubs or switches further increases the cost. If the switch, the link to the server or the server itself fails then the whole network fails. • The most reliable because the failure of a computer or a computer cable does not affect other computer. • Easy to install and to expand with extra computers. • Adding further computers does not greatly affect performance because the data does not pass through unnecessary computers. Content

  17. WLAN (Wireless LAN) • WLAN is a LAN that doesn’t rely on wired Ethernet connections. A WLAN can be an extension to a current wired network or an alternative to it. • WLANs have a data transfer speeds ranging from 1 to 54 Mbps. • The wireless signal can be broadcast to cover an area ranging in size from a small office to a large campus. Content

  18. Data Transmission • It is the physical transfer of data over a point or point or point to multipoint communication cable. Which are made of copper wires, optical fibers, wireless communication channels, and storage media. The data are represented as an electromagnetic signals, such as an electrical voltage, radioactive, microwave, or infrared signal. Content

  19. Bibliography • http://answers.yahoo.com/question/index?qid=20080914004237AAlPZXT • http://en.wikipedia.org/wiki/Client_(computing) • http://en.wikipedia.org/wiki/Peer-to-peer • http://compnetworking.about.com/od/basicnetworkingfaqs/a/client-server.htm • http://en.wikipedia.org/wiki/Server_(computing) • http://en.wikipedia.org/wiki/Wide_area_network • http://en.wikipedia.org/wiki/Local_area_network • http://en.wikipedia.org/wiki/Standalone_server • http://en.wikipedia.org/wiki/Computer_network • http://www.klbict.co.uk/gcse/theory/5_3/5_3_4_topologies.htm • http://en.wikipedia.org/wiki/Data_transmission Content

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