Packet-Switched networks
It move the data in separate, small blocks packets based on the destination address in each packet. When it reach the destination, packets are reassembled in the proper sequence to make up the message.
Circuit-Switched networks
It a type of network where the communications between end devices must be set up or establish before they can communicate. Once set up, the “circuit” is dedicated to the two nodes it connects for the duration of that connection. An example of a circuit-switched network is an analog telephone network.
The Differences Between Packet Switching and Circuit Switching?
Packet switching is different from circuit switching, which provides the basis for traditional telephone networks. Example of Circuit Switching:
"Some of you may remember ordering a pizza from a landline phone in your house before cellular technology dominated everyday communications. When you made a call to order that pizza, a circuit switch created a temporary and dedicated link of fixed bandwidth between communicating end nodes. This link only lasted until the call was complete. If there weren’t enough network resources available, the call wouldn’t be established or “completed as dialed.” Circuit switching can guarantee quality through dedicated bandwidth, but most of this bandwidth is wasted on “dead air.” Since the complexities of making a call are handled in the centralized facilities of a phone company, circuit switching allows the telephone itself to be a relatively simple device."
Meanwhile for Packet Switching:
"Packet switching allows users/caller to equally share bandwidth resources. This is useful for transferring data that doesn’t require real-time responsiveness. Packet switching places the intelligence in the end nodes, rather than the phone company facilities, with a simple underlying network that only directs packets from one side to the other. Packet switching is easier and more affordable than circuit switching. Since all the bandwidth can be used at once, packet switching is more efficient because it doesn’t have to deal with a limited number of connections that may not be using all that bandwidth. Packet switching also requires a less complicated infrastructure that can easily respond should parts of the network fail, making it quicker and less expensive to add new nodes whenever they’re needed. "
Circuit Switching allow user/caller to establish the connection from one end to another end. But as for Packet Switching it allow multiple connection and improve the bandwidth utilization and performance. In term of cost, Packet Switching is cheaper than Circuit Switching.
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