Answer:
The Time-to-live field
Explanation:
The time to live (TTL) is also the hop limit, it is a way of limiting the lifespan of data that is on a system or network. The TTL is set when a TCP packet has been sent. It is the number of routers that it can go through until the packet is gotten rid of or discarded. The Time to Live ensures that a packet is is forwarded through not more than N routers.
