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Hypothetical reliable data transfer protocol: A jumping window based Go-back-N ARQ protocol for file transfer using UDP as the transport protocol:
In this protocol, a window of size W is used. The sender continuously sends W packets corresponding to the current window, and then waits for an acknowledgement. The receiver receives W packets. If all the packets are error-free, it sends out a positive acknowledgement, say RR-i (RR: Receiver Ready). The receiver then moves its window starting from the packet with the sequence number i. Upon receiving RR-i the sender moves its window starting from the packet with the sequence number i. If a receiver receives a damaged packet (say, with the sequence number j) in its current window, it receives and discards all the remaining packets in the current window and it sends out a negative acknowledgement, say REJ-j (REJ: Reject). The receiver then moves its window starting from the packet with the sequence number j. Upon receiving REJ-j the sender moves its window starting from the packet with the sequence number j and sends out packets starting from j. Assume that the packet sequence number is in the range from 0 to 7. For each packet, 100 bytes of data is sent. Assume that a packet can be damaged according to a specified packet error probability. Ignore packet losses, ACK damages and losses. Implement the protocol, and measure and plot the throughput for different values of W (1, 2, 3, 4, and 5) and different error probabilities in the range from 0 to 0.5 in steps of 0.1. Use the random number generator to generate uniform distribution and declare a packet as damaged according to the specified error probability. Write a Report describing your implementation, how you carried out the performance study, performance graphs, and discussion on results.
Q. Develop a completely secure WSN based on the triple key? Wireless network is the most vulnerable type of network to security attack. Unauthorized access to wireless network
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Transposition technique
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What do you understand by cryptanalysis? Discuss about the transposition ciphers substitution cipher, and onetime pads. The messages which are intended to transmit secretly and
homlox prv hetorx orxolxpersorx
Sometimes the special character may see in data and as a part of data they will be misinterpreted as packet data. The solution to this cause is Byte stuffing. In general to
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