Q.1 a) Consider a node A that is using TCP flow control. If RcvBuffer =1300, LastByteRcvd =2500 and LastByteRead =2250. The value of LastByteSent =3700 and LastByteAcked =2600. Now answer the followings: [2+2+2] i. What is the present value of rwnd? ii. What is the amount of un-acknowledged data that A has sent into the connection? iii. How does TCP make sure that a sender will never overflow the receiver's buffer