Computer Science for IGCSE & O level - Data Transmission (Section 10 - No. 50)
What is the function of the 'sequence number' in a packet header?
To identify the sending device.
To ensure all packets reach the destination in the correct order.
To indicate the size of the data payload.
To store the destination IP address.
Explication
The sequence number ensures packets are reassembled in the correct order at the receiving end.