Hello, I need help with the following.. 1. In a sliding window system with each

Question

Hello, I need help with the following..

1. In a sliding window system with each byte numbered, Station A sends a packet with bytes numbered 801 to 900. If the packet arrives with no errors, how does Station B respond?

2. In a sliding window error control system in which each packet is numbered, Station A sends packets 4, 5, 6, and 7. Station B receives them and wants to acknowledge all of them. What does Station B send back to Station A?

3. List the types of error that cannot escape a cyclic redundancy checksum system.

Explanation / Answer

1. In a sliding window system with each byte numbered, Station A sends a packet with bytes numbered 801 to 900. If the packet arrives with no errors, The response of Station B is an ACK with the value 901.

2. In a sliding window error control system in which each packet is numbered, Station A sends packets 4, 5, 6 and 7. Station B receives them and wants to acknowledge all of them. The Station B send back an ACK with the number of the next packet expected to Station A.

3. The types of error that cannot escape a cyclic redundancy checksum system are single bit errors, double bit errors and most errors less than the size r.

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