Notes on Network Topology | Extra References > Computer Basics > Computer Networks | KULLABS.COM

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The arrangement or connection patterns of computers or nodes or devices used in the network is known as network topology. There are five types of common network toplologies.

1. Bus topology
2. Star Topology
3. Ring topology
4. Mesh Topology
5. Hybrid Topology

#### Bus Topology

In this topology, all the computers are connected in a single cable.

1. It is inexpensive and easy to install because all the computers in the network are attached to one single cable.
2. The failure of one computer does not affect the performance of the rest of the networks
3. Computers may be easily added or removed from the network.
1. If a problem arises at any point of the cable, the entire network goes down.
2. It tends to slow down under a heavy load.
3. In this topology, troubleshooting could be difficult.

#### Star Topology

In this topology, all the computers are connected with switch/hub.

1. It is easy to add or remove computers from this topology.
2. If one link fails in network, the other workstations are not affected.
3. It is more reliable.
4. In this topology, very high transmission rates ia possible.
1. It the central switch/hub fails, the whole network goes down.
2. Long cable length is required, since each device is directly connected to the hub/switch.
3. It may be costly to install since long length cable is required.

#### Ring topology

In this topology, all the computers or devices are connected to each other in a closed loop by single communication cable. Data transfer takes place in one direction from one node to another around the ring. It is also called loop network.

1. Each computer does not have to depend on the central device as each computers controls transmission to and from itself.
2. It has short cable connection which increases network reliability.
3. It supports very high data transmission rate.
1. It is difficult to change network structure.
2. If a single computer fails, at least a portion of network wont work.

#### Mesh Topology:

It is a point to point connection between every device in the network.

1. Failure of a device does not affect the data transmission to the destination device.
2. Easy to troubleshoot
1. It is difficult to set up.
2. It is more expensive than other topology.

#### Hybrid Topology

Hybrid networks use a combination of any two or more topologies, in such a way that the resulting network does not exhibit one of the standard topologies.

1. Unlike other networks, fault detection and troubleshooting is easy in this type of topology.
2. It is east to increase the size of network by adding new components, without disturbing existing architecture.
3. It is more flexible as it can be designed according to the requirements of the organization.
1. One of the biggest drawback of hybrid topology is its design.
2. The hubs used to connect two distinct networks, are very expensive.
3. As hybrid architectures are usually larger in scale, they require a lot of cables, cooling systems, sophisticate network devices, etc.

• The arrangement or connection patterns of computers or nodes or devices used in the network is known as network topology.
• There are five types of common network toplologies.

1. Bus topology
2. Star Topology
3. Ring topology
4. Mesh Topology
5. Hybrid Topology
• Hybrid networks use a combination of any two or more topologies.
• Mesh topology is a point to point connection between every device in the network.
.

### Very Short Questions

The network topology is the cabling pattern of interconnection of computers on the network. It can be defined as the physical layout of cabling for connecting computers and other network devices on the network which describe how the computers and networking devices are linked with each other and how they communicate.
The three topologies are as follows:

• Bus topology
• Ring topology
• Star topology

The topology in which nodes are connected in a daisy chain by a linear sequence of buses which is formed by joining many segments of coaxial cables with BNC jacks and T-connectors is known as bus topology.
The disadvantages of bus topology are as follows:

• The entire network does not work if there is problem in any segment of the network bus.
• It is difficult to find fault.
• It provides limited flexibility for change.

The star topology is the most popular network topology used to connect computers and other network devices in which nodes are connected to a centrally-located device called hub in the form of star.
The advantages of star topology are as follows:

• If any node fails, it does not affect the remaining portion of the network.
• It can be extended easily to any size.
• There is less chance of failure of nodes due to cables, connectors, and other networking devices.

Hybrid networks use a combination of any two or more topologies, in such a way that the resulting network does not exhibit one of the standard topologies.

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• ### The arrangement or connection patterns of computers or nodes or devices used in the network is known as ___________.

Network communication
Network topology
Network architecture
Network transmision
• ### In which topology all the computers are connected in a single cable ?

Star topology
Ring topology
Mesh topology
Bus topology
• ### ________ use a combination of any two or more topologies, in such a way that the resulting network does not exhibit one of the standard topologies.

Hybrid network
Mesh network
Cable network
Computer network
• ### In which topology all the computers are connected with switch/hub ?

Hybrid topology
Mesh topology
Ring topology
Star topology
• ### Which of the following is disadvantage of star topology?

>If a single computer fails, at least a portion of network wont work.

>Long cable length is required, since each device is directly connected to the hub/switch.

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