Circuit switching method
Broadly speaking, there are two ways to communicate.
- Circuit switching method
- Packet switching method
First, let's talk about circuit switching.
In order for data to reach its destination, a delivery mechanism is required.
When you send a letter, everyone writes the address (address of the other party), right? This is because without the address information, the postman will be at a loss as to who to deliver the mail to and cannot deliver it.
But what if there is only one way to the destination?
It looks like you can send data to the destination just by sending data!
Consider sending data from computer A to computer B. Computer A seems to be able to deliver the data to computer B just by sending the data to the destination!