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

$5000$ bytes $($rwnd $=5000)$ and the server set its Initial Sequence Number $($ISN$)$ to $200.$ 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 $2000$ 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 $700.$ 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