Thursday, 5 April 2012

4th entry


this week the topic was about


DEFINITION: the study of the arrangement or mapping of the elements of a network

=linear bus
=star wired ring

-A linear bus topology consist of a main run of cable with a terminator at each end
-All nodes (file server, workstation, and peripherals) are connected to the linear cable.


Advantages of a Linear Bus Topology

  • Easy to connect a computer or peripheral to a linear bus.
  • Requires less cable length than a star topology.

Disadvantages of a Linear Bus Topology

  • Entire network shuts down if there is a break in the main cable.
  • Terminators are required at both ends of the backbone cable.
  • Difficult to identify the problem if the entire network shuts down.
  • Not meant to be used as a stand-alone solution in a large building. 
-each node (file server, workstations, and peripherals) connected directly to a central network hub, switch, or concentrator.

Advantages of a Star Topology

  • Easy to install and wire.
  • No disruptions to the network when connecting or removing devices.
  • Easy to detect faults and to remove parts.

Disadvantages of a Star Topology

  • Requires more cable length than a linear topology.
  • If the hub, switch, or concentrator fails, nodes attached are disabled.
  • More expensive than linear bus topologies because of the cost of the hubs, etc. 
- Looks like star topology.
- the MAU (multistation access unit) of a star-wired ring contains wiring that allows information to pass from one device to another in a circle or ring.

- a combination of linear bus and star topology
- star-configured workstation connected to a linear bus backbone
- allow for the expansion of an existing network. 

Advantages of a Tree Topology

  • Point-to-point wiring for individual segments.
  • Supported by several hardware and software venders.

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. 
- each of the system is connected to its respective neighbor forming a ring.
- does not require termination.
- there is no beginning and end point.
 that's all from me >.<

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