Internet Transport Protocols Datagram service (UDP) –No-frills extension of best-effort IP –Multiplexing/Demultiplexing among processes Reliable, in-order delivery (TCP) –Connection set-up & tear-down –Discarding corrupted packets (segments) –Retransmission of lost packets (segments) –Flow control –Congestion control Services not available –Delay and/or bandwidth guarantees –Sessions that survive change-of-IP-address Transport Network Datalink Physical Session Present.
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