Computer Science for IGCSE & O level - Data Transmission (Section 8 - No. 9)
What is a 'hop number' in packet switching used for?
Identifying the destination router.
Counting the number of routers a packet has passed through.
Preventing packets from circulating indefinitely.
Ensuring packets arrive in the correct order.
Explication
A 'hop number' is used to prevent packets from circulating the network indefinitely.