b. TCP connections are full-duplex. This means that the two endpoints can each transmit data over the existing open connection. You can envision this like a chat program in which 2 people at different computers are sending messages back and forth. The image below represents such a connection: Host A Host B What are the missing values for Transfer 2? (SN and ACK): User types host ACKS receipt of echoed. Transfer 1 Seq-30, ACX-40, Transfer host ACKS receipt of 'C, echoes Seg? ACK?, data C back C Transfor 3 Sea-7,ACK-7 What are the missing values for Transfer 3? (SN and ACK):