Answer some IT related questions

Question 1: How can a business use a private virtual network and tunneling to support an off-site connection? (325 words) Question 2: Generate the parity bits and longitudinal parity bits for even parity for the characters 0101010, 0011010, 0011110, 1111110, and 0000110. (no specified words but complete correct answer) Question 3: Answer the following: (80-100 words each) a) In a stop-and-wait error control system, Station A sends packet 0, it arrives without error, and an ACK is returned, but the ACK is lost. What happens next? b) 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? c) In a stop-and-wait error control system, Station A sends packet 0, and it is lost. What happens next? d) 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? Deadline 6 hours. Budget $10. Need plagiarism free and properly referenced work. Only bid if you can meet the deadline and budget. No payment for plagiarized work. Thanks