Final answer:
To address the problems of a previous protocol in ensuring the correct order and reception of multi-packet messages, we propose using packet sequencing, error detection, acknowledgement systems, handling of missing packets, and completion confirmation.
Step-by-step explanation:
To construct a protocol that addresses the problems with a previous protocol and ensures accurate transmission of multi-packet messages, reliability, and order, we can propose the following solution:
- Packet Sequencing: Number each packet in the sequence it is sent to allow the receiver to reassemble the packets in the correct order.
- Error Detection: Include checksums or hash values with each packet to allow the receiver to verify that the packet has arrived intact. If a packet is corrupted, the receiver can request a retransmission.
- Acknowledgement System: After a packet is received and verified, the receiver should send an acknowledgement (ACK) back to the sender. If an ACK is not received within a certain timeframe, the sender will retransmit the packet.
- Missing Packet Handling: The receiver maintains a buffer and tracks the sequence numbers. If a packet is missing in the sequence, the receiver requests that specific packet from the sender.
- Completion Confirmation: Once all packets are received or a pre-defined end-of-transmission packet is received, the receiver sends a final acknowledgement. The sender only considers the transmission successful after receiving this final ACK.
These steps ensure that both the sender can construct a multi-packet message and the receiver can reassemble it accurately, while both can confirm the successful arrival of the full message.