Which of the following fields in the IPv6 header is decremented by 1 for each router that forwards
the packet?

A.
Flow label

B.
Next header

C.
Traffic class

D.
Hop limit

Explanation:

The hop limit field in the IPv6 header is decremented by 1 for each router that forwards a packet.
The packet is discarded when the hop limit field reaches zero.
Answer option B is incorrect. Next header is an 8-bit field that specifies the next encapsulated

protocol.
Answer option A is incorrect. Flow label is a 20-bit field that is used for specifying special router
handling from source to destination for a sequence of packets.
Answer option C is incorrect. Traffic class is an 8-bit field that specifies the Internet traffic priority
delivery value.