1.Devise a code set for the digits 0 to 9 that has a Hamming distance of 2.
2.In a sliding window error control system in which each byte is numbered, Station A sends a packet with bytes numbered 801 to 900. If the packet arrives with no errors, how does Station B respond?
3.Given today's networking technology; 3-bit and 7-bit sliding window sizes seem very restrictive. What would be a more reasonable size today? Explain your reasoning.