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Network Topologies Essay

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Below is an essay on "Network Topologies" from Anti Essays, your source for research papers, essays, and term paper examples.

Network Topologies

Topology refers to the layout of connected devices.

The choice of topology is dependent upon
    • type and number of equipment being used
    • planned applications and rate of data transfers
    • required response times
    • cost
Network topologies are categorized into the following basic types:


      Bus Topology

Bus networks use a common backbone to connect all devices. A single cable, the backbone, functions as a shared communication medium that devices attach or tap into with an interface connector. A device wanting to communicate with another device on the network sends a broadcast message onto the wire that all other devices see, but only the intended recipient actually accepts and processes the message.  Both ends of the network must be terminated with a terminator. Wiring is normally done point to point. A faulty cable or workstation will take the entire LAN down. A faulty cable or workstation will take the entire LAN down.

[pic]

Fig Bus Network Topology




      Ring Topology

In a ring network, every device has exactly two neighbors for communication purposes. All messages travel through a ring in the same direction (either "clockwise" or "counterclockwise"). A failure in any cable or device breaks the loop and can take down the entire network.
To implement a ring network, one typically uses FDDI, SONET, or Token Ring technology. Ring topologies are found in some office buildings or school campuses.

A data token is used to grant permission for each computer to communicate.

[pic]

Fig Ring Network Topology


      Star Topology

Many home networks use the star topology. A star network features a central connection point called a "hub" that may be a hub, switch or router. Devices typically connect to the hub with Unshielded Twisted Pair (UTP) Ethernet.

Compared to the bus topology, a star network generally requires more cable, but a failure in any star network cable will only take down...

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Network Topologies. Anti Essays. Retrieved December 16, 2018, from the World Wide Web: http://teachingsail.com/free-essays/Network-Topologies-410016.html


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