20-06-2013, 03:09 PM
TOP0LOGY
TOP0LOGY.pptx (Size: 368.03 KB / Downloads: 17)
WHAT IS TOPOLOGY?
Topology is a physical layout such as design,shape,structure,formats,diagram,interconnection etc.
NETWORK TOPOLOGY
It is a graphical representation of the relationship of all the links connecting the devices.There are six types of network topology.1. Bus2. Ring3. Star4. Mesh5. Tree6. Hybrid
BUS TOPOLOGY
There is one back-bone cable in this topology. BNC TERMINAL CONNECTOR is connected with dropline for branching. Signal is free to travel throughout the cable in bus topology. We should properly terminate both end so that signal are not replicated and other network are not disturbed.
ADVANTAGES OF BUS TOPOLOGY
1) Easy to implement & extend.2) Easy to install.3) Suaitable for small network.4) Cost is low as compared to other topology.5) Easy identification of cable fault.
Disadvantages Of Bus Topology
1) Limited cable length & number of computer.2) If there is a problem with the cable the entire network breaks down.3) Proper termination is required.4) Performance degrades as additional computers are added.5) Only one can transmit at a time. Hence communication becomes slightly slow.
RING TOPOLOGY
In ring topology each computer is connected to next computer and the last computer is connected to the first computer. It means that all the computer are connected with each other and form a close loop.There is no termination of cable because every computer is connected to each other. The communication between the computer takes place with the help of token.
STAR TOPOLOGY
In star topology each computer is connected to the central unit called hub.Each Computer on a star network communicates with each other via central unit (hub).Hub is responsible for broadcasting the signal to all other computers.In star topology twisted pear cable is used.Hub in a star network can be active or passive.
MESH TOPOLOGY
In this topology all the computers and networking devices are interconnected with each other.It means that each device has a dedicated point to point link to every other device.The term dedicated means that the link carries only between two devices.