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ppt on network topology

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ppt on network topology

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  1. Network Topologies CSC1202-2013 (c) Nouf AlJaffan

  2. What is Topology? • The physical arrangement of the computer system/node , which is connected to each other via communication media is called Topology. • Types of Physical topology: • Bus • Ring • Star • Mesh • Hybrid • Tree CSC1202-2013 (c) Nouf AlJaffan

  3. Bus CSC1202-2013 (c) Nouf AlJaffan

  4. Bus • In Bus topology , one long cable acts as a single communication channel and all the devices are connected to this cable. CSC1202-2013 (c) Nouf AlJaffan

  5. Bus Advantages Disadvantage • Works well for small networks • Easy to install and maintain • It is less expensive • Easy to add/remove nodes in network • Required only cable • In case of any computer failure, there will be no effect on other devices. • If cable is failed then entire network will be failed • Messages are broadcast so we can’t send private messages • It takes more time to pass the message from one place to another place • The length of the cable is limited and data is transmitted only in one direction CSC1202-2013 (c) Nouf AlJaffan

  6. Ring CSC1202-2013 (c) Nouf AlJaffan

  7. Ring topology • It is called ring topology because it forms Ring. In this topology each node is strongly connected with adjacent node. CSC1202-2013 (c) Nouf AlJaffan

  8. Ring Advantages Disadvantage • It forms a strong network. • Each an every node can shared data with another node connected • Transmission rate of data is very in speed. • The data send through ring topology will be broadcast. • It is very difficult task to add some new computer. • If we want to send data from a source to destination machine then data will unnecessary passed to all nodes. • Single point of failure , that means if a node goes down entire network goes down. • It is very difficult to recover the ring topology if any particular machine is not working properly. • We can’t send private messages. CSC1202-2013 (c) Nouf AlJaffan

  9. Star CSC1202-2013 (c) Nouf AlJaffan

  10. Startopology • Every node on the network is connected through a central device called HUB or Switch and Sharing of data is only possible though HUB. CSC1202-2013 (c) Nouf AlJaffan

  11. Star Advantages Disadvantage • It broadcast the messages. • It is less expensive due to less cable. • Easy to connect new nodes without affecting rest of the network. • If one node failed, then it would not be a failure of entire network. • In star topology we must required a network device like Hub, Switch etc. • If two nodes want to share the data, sharing is only possible through Hub. • If Hub is failed the entire network will be failed. • We can’t send private data. CSC1202-2013 (c) Nouf AlJaffan

  12. Mesh CSC1202-2013 (c) Nouf AlJaffan

  13. Mesh Topology • In this topology, each an every computer is directly connected with each other, so we can directly send the data to the destination machine without going to intermediate machine. CSC1202-2013 (c) Nouf AlJaffan

  14. Mesh Advantages Disadvantage • It is very good topology to send the private messages. • All nodes are directly associated with another node so, it provide point to point connection. • Unlike ring topology , if a particular machine is failed then entire network will not fail . • Multiple devices can send or receive data simultaneously. • It is very difficult to add some new node because each an every computer directly connected with another one. • If a particular machine not working then , we can’t send or receive data from the failure machine. CSC1202-2013 (c) Nouf AlJaffan

  15. Hybrid Physical Topologies • Combination of various different topology is called hybrid topology. CSC1202-2013 (c) Nouf AlJaffan

  16. Hybrid Physical Topology Advantages Disadvantage • It is very extremely flexible. • It is very reliable. • It is used for create large Network. • It is type of network expensive. • Design of a hybrid network is very complex. • Installation is a difficult process. CSC1202-2013 (c) Nouf AlJaffan

  17. Tree Topology • In this topology, all the nodes are connected like a branches of tree. The combination of Bus and Star topology is called tree topology. CSC1202-2013 (c) Nouf AlJaffan

  18. Tree Topology Advantages Disadvantage • Supported by several hardware and software vendors. • Tree topology provides easy maintenance and easy fault identification can be done. • This topology provides a hierarchical as well as central data arrangement of the nodes. • Treatment of the topology is pretty complex. • The establishment cost increases as well. • Due to the presence of large number of nodes, the network performance of tree topology becomes a bit slowly. CSC1202-2013 (c) Nouf AlJaffan

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