Examples
Hop-by-hop Telex forwarding and UUCP are examples of message switching systems.
When this form of switching is used, no physical path is established in advance in between sender and receiver. Instead, when the sender has a block of data to be sent, it is stored in the first switching office (i.e. router) then forwarded later at one hop at a time. Each block is received in its entity form, inspected for errors and then forwarded or re-transmitted.
A form of store-and-forward network. Data is transmitted into the network and stored in a switch. The network transfers the data from switch to switch when it is convenient to do so, as such the data is not transferred in real-time. Blocking can not occur, however, long delays can happen. The source and destination terminal need not be compatible, since conversions are done by the message switching networks.
A message switch is “transactional”. It can store data or change its format and bit rate, then convert the data back to their original form or an entirely different form at the receive end. Message switching multiplexes data from different sources onto a common facility. A message switch is a one of the switching technology.
In message switching, when a message consists of a block of data to be sent, it is stored in the first switching office (i.e. router) and then forwarded later, one hop at a time. Each block is received in its entirety, inspected and later retransmitted. A network using this technique is referred to as a store-and-forward network.
Read more about this topic: Message Switching
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