Circuit Switched Networks − Circuit switched networks are connection-oriented networks. Here, a dedicated route is established between the source and the destination and the entire message is transferred through it.
Packet Switched Networks − Packet switched networks are connectionless networks. Here, the message is divided and grouped into a number of units called packets that are individually routed from the source to the destination.
Differences with respect to technology
|Serial Number||Circuit – Switching||Packet – Switching|
|1||It is a connection oriented network switching technique.||It is a connectionless network switching technique.|
|2||A dedicated path has to be established between the source and the destination before transfer of data commences. Once, the data is transmitted, the path is relinquished.||There is no need to establish a dedicated path from the source to the destination.|
|3||It is inflexible in nature since data packets are routed along the same dedicated path.||Each packet is routed separately. Consequently, it is flexible in nature where the different data packets follow different paths.|
|4||It was initially designed for voice transfer.||It was initially designed for data transfer.|
|5||The entire message is received in the order sent by the source.||The individual packets of the message are received out of order and so need to be reassembled at the destination.|
|6||It is implemented at Physical Layer.||It is implemented at Network Layer.|
It has two approaches −
It has two approaches −
|8||It is not a store and forward transmission.||It is store and forward transmission.|
|9||Data is processed and transmitted at the source only.||Data is processed and transmitted, not only at the source but at each switching station.|
Differences with respect to applicability, advantages and disadvantages.
|Serial Number||Circuit – Switching Networks||Packet – Switching Networks|
|1||They are suitable for long continuous transmission, like voice calls.||They are unsuitable for applications that cannot afford delays in communication like high quality voice calls.|
|2||Once a route is established between the source and the destination, the route cannot be used by any other user. This leads to poor utilization of resources.||It allows simultaneous usage of the same channel by multiple users. This guarantees better resource utilization.|
|3||Bandwidth requirement is high even in cases of low data volume.||It ensures better bandwidth usage as a number of packets from multiple sources can be transferred via the same link.|
|4||Time required to establish connection may be high.||Delay in delivery of packets is less, since packets are sent as soon as they are available.|
|5||Initial cost is low.||Packet switching high installation costs.|
|6||The protocols for delivery are relatively simpler.||They require complex protocols for delivery.|
|7||It is more reliable.||It is less reliable.|