Question 3 - TCP Flow Control (16 points): Assume that a client has opened a TCP connection with a server to download a file. During setting up the connection, the client set its receive window to 4000 bytes (rwnd =4000 ) and the server set its Initial Sequence Number (ISN) to 100. Assume that no segments were lost for the whole duration of the connection. The following events happened in order between the client and the server: (a) (4 points) Once the connection is opened, the server sent 1000 bytes. How much more the server can send to the client without waiting for an ACK? (b) (4 points) The server then received an ACK with a value of 600 . How many more bytes the server can send before receiving the next ACK? (c) (4 points) The server then sent 2000 bytes segment. What is the sequence number of this TCP segment? (d) (4 points) The server then received an ACK with a value of 2500 and a rwnd with a value of 7000 . How many more bytes the server can send before receiving the next ACK? Hint : don't forget to take into account the 3-way TCP handshake when calculating the acknowledgements and sequence numbers