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a) Assume that the time required to transmit one packet (i.e. the packet length divided by link data rate) is 10ms and the Round Trip Time (from Source to Destination and back) is 50ms. In the space below, draw a diagram illustrating the timing of Source and Destination exchanging packets and acknowledgments using a stop-and-wait protocol. Assume that packets are only sent from source to destination and that acknowledgments (of negligibly small size) are sent back immediately after the data frame is received.
b) Calculate link utilisation (proportion of time the channel is actually used for transmission) for the stop-and-wait case.
Connections in ATM are known virtual circuits or virtual channels These are known virtual, since connections are created in ATM by starting values in memory locations (tables) in A
a) Used for sending e-mail. b) Uses port 25.
Data Link Layer Sub layers · Logical Link Control (LLC) - upper layer · Handles control information, logical addressing and data · MAC (Medium Access Control) - lower layer ·
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Session layer examples are Netbios Names, SQL, NFS, X Windows, and RPC.
Testing is used for estimate the quality of the product. Unit Testing is tested for every part of the product. Integrate the unit & tested.
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