Answer & Explanation:
Following are the benefits or advantages of circuit switching type:
➨As there is very less delay for the call to be established and also during the conversation, the circuit switching network is widely used for real-time voice services throughout the world since years. There is almost no waiting time at voice switches used for the call.
➨It will have realistic voice communication and consecutively speaking persons are easily identified due to higher sampling rates used.
➨Once the connection is established between two parties, it will be available till end of the conversation. This guarantees reliable connection in terms of constant data rate and availability of resources (Bandwidth, channels etc.). Hence it is used for long distance and long duration calls without any sort of tiredness.
➨No loss of packets or out of order packets here as this is connection oriented network unlike packet switched network.
➨The forwarding of information is based on time or frequency slot assignments and hence there is no need to examine the header as in the case of packet switching network. As there is no header requirement, there is low overhead in circuit switching network.
Following are the disadvantages of circuit switching type:
➨As is it designed for voice traffic, it is not suitable for data transmission.
➨The channels and bandwidth used in the connection are not available till the conversation or call is broken. Due to this, even if they are not utilized, they can not be used for any other purpose (e.g. connections). Hence circuit switching is inefficient in terms of resource utilization (i.e. channels, bandwidth etc.). Moreover due to this, if there are many users than the available channels, it leads to dropped calls or calls not being established.
➨The connection requires call setup delay and it is not instantaneous. This means there is no communication until connection is established and resources are available.
➨It is more expensive compare to other techniques due to dedicated path requirement. Consecutively, the call rates are also higher.
