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 encapsulatedprotocol.
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.