1.In a sliding window error-control system, Station A sends a packet with bytes 501700, followed immediately by a packet with bytes 701900. Create a diagram of this error- control scenario, and show the response(s) that Station B will send if there are no errors.

2. In a sliding window error-control system, Station A sends a packet with bytes 501700, followed immediately by a packet with bytes 701900. Create a diagram of this error- control scenario, and show the response(s) that Station B will send if the second packet is lost in the network.

3 .A system is going to transmit the byte 10010100. Show the four check bits c8, c4, c2,

and c1 that will be added to this byte.