Which field of ip address is changes from router to router?

The TTL will be reduced by one every time it passes a router. Because this changes the IP header, the checksum also has to be recalculated.

The TTL will be reduced by one every time it passes a router. Because this changes the IP header, the checksum also has to be recalculated.

The TTL will be reduced by one every time it passes a router. Because this changes the IP header, the checksum also has to be recalculated.

The TTL will be reduced by one every time it passes a router. Because this changes the IP header, the checksum also has to be recalculated.