Tree Topology

Tree Topology.

A tree topology combines the characteristics of bus and star topologies. It consists of different groups of computers attached in star topology. The groups are then connected to a bus backbone cable. It is used for the extension of an existing network.

Advantages:

1. It provides point to point writing for individual segments.
2. It is supported by several hardware and software vendors.

Disadvantages:

1. Overall length of each segment is limited by the type of cabling used.
2. If the backbone is breaks, the entire segment  goes down
3. It is more difficult to configure and wire than other topologies.

RingTopology

    Ring Topology

In ring topology, each computer is connected to next computer and last connected to the first computer. Thus, a ring of computers is formed.

Working of ring topology:

Each computer receives message from previous computer and transmit it to the next computer. The message flow in one direction. The message is speed around the ring until it reaches the connect destination computer.

Advantages:

1. It is less expensive than star topology
2. Every computer has equal access to the network.

Disadvantage:

1. Failure of one computer in the ring can affect the whole network
2. It is difficult to troubleshoot.
3. Adding or removing computers affect the whole network

Star Topology

       Star Topology

All computers in star topology are connected with central device called hub. It is mostly use in client server networks.

Working of star topology:

The sending computer sends the data to hub. The hub send the data to receiving computer. Each computer in star topology communicate with hub.

Advantages:

1. It is easy to maintain and modify network.
2. Adding or removing computers can be done without disturbing the network.
3. Finding faults becomes very simple.
4. Single computer failure does not bring down the hole network.
5. It is more flexible than other topology.

Disadvantages:

1. If central hub fails, the entire network breaks down
2. It requires a large length of cable to connect computers.
3. It is more expensive.