Station A has a 6000 byte message to send to station B. The message is to be sent using a TCP/IP connection over an Internet connection. Assume the TCP entities at A and B have initial sequence numbers of 4000 and 5000 respectively. Assume each TCP PDU contains a maximum of 4000 bytes of user data and each credit allocation if for 4000 bytes from the next byte expected.

Sketch the bidirectional exchange of TCP PDUs needed for the delivery of these messages. You must show all three phases of the TCP operation. Assume a graceful closure takes place.

For each TCP PDU, indicate the value of the following fields (if they are active):

1. Sequence Number 2. Acknowledgement Number 3. SYN Flag 4. ACK Flag 5. RST Flag 6. FIN Flag 7. Window 8. Number Of bytes in data field