NETWORK BASIC
NETWORK ARCHITECTURENETWORK TOPOLOGY
DEFINITION OF NETWORK TOPOLOGY:
The layout of the computers and devices in a communications network.


Types of network topology

Bus Topology

Ring Topology

Star Topology
Definition Network that consists of a single central cable to which all computers and other device connect. Network where a cable form a closed loop ring with all computers and devices arranged along the ring. All computers and other devices on the network connect to a central device thus forming a star,
Description
  • Each devices is connected to the bus cable through T-conncetor.
  • Terminator is at each end to prevent signal from bouncing back and forth on the bus cable.
  • Two types of devices that provide a commo central point tp all the other devices on the network are hub and switch.
Data transmit Transmits data and instructions as a series of signals in both direction where all nodes receive recipient will accept the signals. Data travels the entire ring in one direction and reach its destinatiom by using token. Data transfers from on node to another node  passing through hub/switch.
Advantages
  • Failure in one device does not affect the rest of the bus network.
  • Inexpensive and easy to install.
  • Devices can be without disturbing the rest of the network.
  • All computers have equal access to resources in the network.
  • The uses of token enables all devices in ring topology to shre the network resources fairly.
  • Cable faults are easily located
  • The transmission of data is simple.
  • If one devices fails, only that device is affected.
  • Devices can be added and removes with little distruption.
  • Easy to troubleshoot.
Disadvantages
  • The network will malfuntion if the backbone breaks down.
  • The break will prevent all systems form accessing the network.
  • The performance of network will slow down if more computers are added because of data collision.
  • Network malfuntion if device breaks down. 
  • Difficult to install.
  • Data packets must pass through every computer making it slower.
  • Network will mulfuntion if hub/switch breaks down.
  • Requires more cable cost than other topologies.