Network topoligies
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Network topoligies

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Network topoligies Network topoligies Presentation Transcript

  • Presentation of Information Technology Presented To: Sir Salman Ashar
  • Group Members:
    • Mirza Ali Raza. 90
    • Syed Ali Kamran. 50
    • M.Jafar Tayar. 48
    • Hussain zain-ul- abiden. 85
    • Amjad Abbas. 71
    • Samiullah warrich. 62
    • Raja shoaib Azam 59
  • Presentation Outline:
    • Networks.(LAN,MAN,WAN )
    • Interconnecting/Linking Devices
    • Signals.
  • Network: A computer network is a system for communication between computers. Components of Networks:
    • People.
    • Hard ware.
    • Software.
    • connectivity.
    • Procedure.
  • Network Diagram:
  • Local Area Network: A local area network is data communication system in a limited geographical area. Like a home, office, or small group of buildings
  • Metro-Politan Area Network: A Metro-politan area network is a network designed to extend over an entire city.
  • Wide Area Network: A wide area network provides long distance transmission of data over a large geographical areas Comprising a country,a continent or the whole world. The most well-known example of a WAN is the Internet.
  • Network Topology: . The logical layout of the cables and devices that connects the nodes of a computer.
    • Star Topology.
    • Bus Topology.
    • Ring Topology.
    • Mesh topology.
    • Tree Topology.
    • Hybrid Topology.
    Types of Topologies:
  • Bus Topology: All devices are connected to a central cable, called the bus or backbone .
  • Star Topology: All devices are connected to a central hub.Nodes communicate across the network by passing data through the hub.
  • Ring Topology: All devices are connected to one another in the shape of a closed loop, so that each device is connected directly to two other devices, one on either side of it.
  • Mesh Topology: In a true mesh topology every node has a connection to every other node in the network
  • Tree Topology: Tree topologies integrate multiple star topologies together onto a bus.
  • Hybrid Topology: A hybrid topology is always produced when two different basic network topologies are connected. Two common examples for Hybrid network are: star ring network and star bus network.
  • Linking devices: A type of linking mechanism needed to interconnect at least two computers.They are used to create a network. For example Cables,Switches or Hubs.
  • Connecting Devices Networking Devices Internetworking Devices Repeaters Bridges Routers Gateways Repeater Bridges Routers Gateways Networking Devices Internetworking Devices
  • Repeaters : A network device used to regenerate or replicate a signal. Repeaters are used in transmission systems to regenerate analog or digital signals distorted by transmission loss.
  • Bridges : A Bridge is an interface used to connect the same types of networks.
  • Bridges Diagram:
    • Simple Bridge
    • Multipoint Bridge
    • Transparent / Learning Bridge
    Types of Bridges:
  • Router : A Router is a special computer that directs communicating messages when several networks are connected together.
    • Routing concepts
    • Least cost Routing
    • Non adaptive Routing
    • Adaptive Routing
    Routing:
  • Gateways: A Gateway is an interface permitting communication between dissimilar networks.
  • Other Devices:
    • Multiprotocol Routers
    • Brouters
    • Switches
  • MULTIPROTOCOL ROUTERS: Multiprotocol routers have been designed to route packets belonging to two or more protocols
  • BROUTER: A Brouter is a single protocol or multi protocol router that sometimes acts as a router and sometimes as a bridge.
  • Switches : Switches are the hardware or software devices capable of creating temporary links between two or more devices linking to the switch but not to each.
  • Hubs: A Hub is the simple connection point for different type of devices on a network. It sends all the data to all devices connected to it.
  • Nodes: Any device that is attached to a network.A node may be a microcomputer,terminal,storage device or peripheral device which enhance the usefulness of the network.
  • Signals: The electronic transformation of data and information through a medium is called signal.
  • Types of Signals:
    • Analog signal.
    • Digital signal.
  • Analog signals: The transformation of data in the form of waves.
  • Digital signals: The signals which travels in form of 0s and 1s .
  • Periodic signal: Periodic signals consist of a continuously repeated pattern.
  • Aperiodic signal: Aperiodic signals consist of a non repeated pattern.
  • Types of Analog signal:
    • Simple signal.
    • Composite signal.
  • Simple Signal: A simple analog signals consist of a single sine wave or a single frequency signals.
  • Composite signals: The signals which composed of more than one sine waves having different frequencies.
  • Frequency spectrum and bandwidth: The frequency spectrum of a signals is the collection of all the component frequencies that it contain . The bandwidth of a signal is the width of frequency spectrum.
  • Digital Signal: The signals which travels in form of 0s and 1s .
  • Bit interval and bit rate: The bit interval is the time required to send a single bit. The bit rate is number of bit intervals per second,usually expressed in bits per second.
  • Any Questions?
  • Thank You.