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  • 1. NetworkingName:- Karanjeet SinghClass:- XIISec:- BRoll No. :-161
  • 2. INDEX2
  • 3. Presented by:Karanjeet Singh3
  • 4.  A network consists of two or more computers thatare linked in order to share resources, exchangefiles, or allow electronic communications. The computers on a network may be linked throughcables, telephone lines, radio waves, satellites, orinfrared light beamsComputer Network:4
  • 5.  File sharing Resource sharing Communication and collaboration Remote access Data protectionNeed of Computer Network:5
  • 6.  Routers Gateways Repeaters Bridges Hub ModemDevices Use To Connect Network:6
  • 7.  Local Area Network Wide Area Network Metropolitan Area NetworkTypes Of Network:7
  • 8.  A local area network (LAN) is a group of computersand associated devices that share a commoncommunications line or wireless link. Typically, connected devices share the resources of asingle processor or server within a small geographicarea . . A local area network may serve as few as two orthree users or as many as thousands of users.Local Area Network:8
  • 9. 9
  • 10.  The WAN is a communications network that makesuse of existing technology to connect localcomputer networks into a larger working networkthat may cover both national and internationallocations.Wide Area Network:10
  • 11. 11
  • 12.  A metropolitan area network (MAN) is a network thatinterconnects users with computer resources in a geographicarea or region larger than that covered by even a large localarea network but smaller than the area covered by a wide areanetwork (WAN). It is also used to mean the interconnection of several local areanetworks by bridging them with backbone linesMetropolitan Area Network (MAN):12
  • 13. Network Topologies Network Topology – Maps of how the physical or logical paths of network devicesconnect. The three major topologies are star, ring, and bus. Star Topology – Most common Ethernet network topology where each deviceconnects to a central hub or switch. Hub – A device used with the Universal Serial Bus or in a star network topology thatallows multiple device connections. Switch – In star networks, a Layer 2 central controlling device. A switch looks ateach data frame as it comes through each port. Ring Topology – Network that is physically wired like a star network but, logicallyin a ring; passes control from one device to the next in a continuous fashion using aspecial data packet called a token. Used in Token Ring networks. Bus Topology – Network wherein all devices connect to a single cable. If the cablefails, the network is down. Mesh Topology – Network where all devices connect to each other by cabling toprovide link redundancy for maximum fault tolerance. Most likely in WANs.13
  • 14. Network TopologiesHub/Switch14
  • 15. Network TopologiesStar Topology15
  • 16. Network TopologiesLogical Ring Topology16
  • 17. Network TopologiesBus Topology17
  • 18. Network Topologies18
  • 19. 20