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sp...mads sp...mads Document Transcript

  • Shivajipoly.collegesangola Information search On Network topology Submitted by:1. Surajwaghmare 2. Somnathwaghmare 3. Prasad jadhav 4. Mujamelshaikh 5. Akashpawar 6. Daya sale Contents: What is Topology  Different Topologies  Advantages and Disadvantages of different Topologies What is Topology:-
  • The pattern of interconnection of nodes in a network is called the Topology The factors while selecting a Topology  Cost  Flexibility  Reliability Different Topologies: The Star Topology  The Bus Topology  The Ring Topology  The Tree Topology  Hybrid Topology  Mesh Topology  Star Topology
  •  All computers/devices connect to a central device called hub or switch.  Each device requires a single cable  point-to-point connection between the device and hub.  Most widely implemented  Hub is the single point of failure Advantages: Short cable length
  •  No wiring closest space required  Suitable for optical fibers Disadvantages: Node failure causes network failure  Difficult to diagnose faults  Network reconfiguration is difficult The Bus topology:- • Uses a trunk or backbone to which all of the computers on the network connect. • Systems connect to this backbone using T connectors or taps. • Coaxial cablings ( 10Base-2, 10Base5) were popular options years ago.
  • Advantages:Short cable length and simple wiring layout Resilient Architecture Easy to extend Disadvantages:Fault diagnosis is difficult Fault isolation is difficult Repeater configuration Nodes must be intelligent The Ring Topology:- Each node is connected to two and only two neighboring nodes Data is accepted from one neighboring node transmitted to other Data travels in one direction
  • After passing through each node, it returns to sending node, which removes it Advantages: Short cable length  No wiring closest space required  Suitable for optical fibers Disadvantages: Node failure causes network failure  Difficult to diagnose faults  Network reconfiguration is difficult The Tree Topology
  •  A tree topology (hierarchical topology) can be viewed as a collection of star networks arranged in a hierarchy.  This tree has individual peripheral nodes which are required to transmit to and receive from one other only and are not required to act as repeaters or regenerators.  The tree topology arranges links and nodes into distinct hierarchies in order to allow greater control and easier troubleshooting.  This is particularly helpful for colleges, universities and schools so that each of the connect to the big network in some way. Advantages of a Tree Topology:• Point-to-point wiring for individual segments. • Supported by several hardware and software vendors. • All the computers have access to the larger and their immediate networks. Disadvantages of a Tree Topology:• Overall length of each segment is limited by the type of cabling used.
  • • If the backbone line breaks, the entire segment goes down. • More difficult to configure and wire than other topologies theMesh Topology • In this topology, each node is connected to every other node in the network. • Implementing the mesh topology is expensive and difficult. • In this type of network, each node may send message to destination through multiple paths. • While the data is travelling on the Mesh Network it is automatically configured to reach the destination by taking the shortest route which means the least number of hops. Advantage of Mesh Topology:• No traffic problem as there are dedicated links. • It has multiple links, so if one route is blocked then other routes can be used for data communication.
  • • Points to point links make fault identification easy. Disadvantage of Mesh Topology:• There is mesh of wiring which can be difficult to manage. • Installation is complex as each node is connected to every node. • Cabling cost is high. THE Hybrid Topology • A combination of any two or more network topologies. • A hybrid topology always accrues when two different basic network topologies are connected. • It is a mixture of above mentioned topologies. Usually, a central computer is attached with sub-controllers which in turn participate in a variety of topologies
  • Advantages of a Hybrid Topology:• It is extremely flexible. • It is very reliable. Disadvantages of a Hybrid Topology:• Expensive .……thank you…….