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Chapter 2
Protocol Attributes
F I G U R E 2 . 6
Flow and error control
Error Control
Error control is responsible for checking each transmission and verifying
that all of the PDUs are contiguous and not erroneous. If there are missing
or damaged PDUs, the destination will not send an ACK packet for the pre-
vious transmission. (Refer to Figure 2.6).
Once all of the data is transferred without errors, the originating system
sends a termination request, which tells the destination system that no more
data needs to be transmitted. The destination system then responds with a
termination acknowledgment.
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