Network topology L4 Q4

Network topology

Is the schematic description of a network arrangement, connecting various nodes (sender and receiver) through lines of connection

bus topology, ring topology, star topology, mesh topology, tree topology, hybrid topology

Types of network topology

Bus topology

It is a network type in which every computer and network device is connected to single cable. When it has exactly two end points, then it is called linear ____ topology

Features of bus topology

1.It transmit data only in one direction

2.Every device is connected to a single cable

Advantages of bus topology

1.It is cost effective

2.cable required is least compared to other network topology

3.used in small networks

4.It is easy to understand

5.easy to expand joining two cables together

Disadvantages of bus topology

1.cables fails then whole network fails

2.if network traffic is heavy or nodes are more the performance of the network deceases

3.cable has a limited length

4.It is slower than the ring topology

Ring topology

It is called __ topology because it forms a ring as each computer is connected to another computer, with the last one connected to the first. Exactly two neighbors for each device

Dual ring topology

The transmission is unidirectional, but it can be made bidirectional by having 2 connections between each network node. It is called ___

Disadvantages of ring topology

1.Troubleshooting is difficult

2.Failure of one computer disturbs the whole network

Star topology

In this type of topology, all the computer are connected to a single hub through a cable. This hub is the central node and all other nodes are connected to the central node

Features of star topology

1.Every node has its own dedicated connection to the hub

2.Hub acts as a repeater for data flow

Advantages of star topology

1.Fast performance with few nodes and low network traffic

2.Hub can be upgraded easily

3.Easy to setup and modify

4.Only that node is affected which has failed, rest of the nodes can work smoothly

Disadvantages of star topology

1.Cost of installation is high

2.Expensive to use

3.If the hub fails then the whole network is stopped because all the nodes depend on the hub

Mesh topology

It is a point-to-point connection to other nodes or devices. All the network nodes are connected to each other. has n(n-1)/2 physical channels to link devices

Features of mesh topology

1.Fully connected

2.Robust (if one of the nodes goes down, it doesn’t necessarily bring to the entire network down)

3.Not flexible

Disadvantages of mesh topology

1.heavily cabled

2.costly

3.if more nodes are added, maintenance is difficult

4.central hub fails, network fails

Tree topology

It has a root node and all other nodes are connected to it forming a hierarchy. It is also called hierarchical topology. It should be at least have 3 levels to the hierarchy

Features of tree topology

1.Ideal if workstations are located in groups

2.Used in wide area network

3.Easily managed and maintained

4.Error detection is easily done