In message switching technique, the source computer sends the data or the message to the switching office first, which stores the data in its buffer. It then looks for a free link to another switching office and then sends the data to this office. This process is continued until the data are delivered to the destination computers.
According to the working principle of message switching, it is also known as store and forward. That is, store first in switching office and then forward later, one jump at a time.
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