Network Topology Name: Amina Rashid Al-kindi ID: 201211224 Group: 3.

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Presentation transcript:

Network Topology Name: Amina Rashid Al-kindi ID: Group: 3

What is Network Topology?  The physical topology of a network refers to the configuration of cables, computers, and other peripherals. Physical topology should not be confused with logical topology which is the method used to pass information between workstations. Logical topology was discussed in the Protocol chapter.  There are several basic network topologies: star, bus, ring, mesh, and hierarchical etc..

A Star topology . A star network has a central node that connects to each of the other nodes by a single, point-to-point link. Any communication between one node and another in a star topology must pass through the central node.

Bus Topology  In a bus topology, nodes are arranged along a single length of twisted- pairwire, coaxial cable, or fiber-optic cable that can be extended at the ends. Using a bus topology, it is easy and inexpensive to add a node to the network, and losing a node in the network will not cause the network to fail. The main disadvantages to the bus topology are that a defective bus causes the entire network to fail. Also, providing a bus with inadequate bandwidth will degrade the performance of the network.

Video about Network Topology

Ring Topology  A network topology that is set up in a circular fashion in which data travels around the ring in one direction and each device on the right acts as a repeater to keep the signal strong as it travels. Each device incorporates a receiver for the incoming signal and a transmitter to send the data on to the next device in the ring. The network is dependent on the ability of the signal to travel around the ring.

A mesh Topology  A mesh network design is one in which each device is connected to every other device located on the network, like a spider web.The advantage to this design is the redundancy of the connected devices; if one link fails, it will not affect the rest of the network. The disadvantages of this design are the cost of all the required medium and limited scalability. If you add a device to a network that currently has four devices, then you must connect the new device to the four existing devices with individual cable drops.

Hierarchical Topology  In a hierarchical topology, nodes are arranged like an inverted tree with the root (usually the mainframe computer) as the highest level and the leaves (usually the desktop computers) as the lowest level. It is very cheap, but may have possible traffic jams at the top level.

Hybrid Topology  In a hybrid topology, nodes are arranged in more than one topology, which may include star, ring, and hierarchical. A hybrid topology can integrate together various computer configurations that may have special reasons for their own choice of topology. A hybrid network will allow companies to pick the advantages from several different topologies.

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