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Which of the following fields in the IPv6 header is decremented by 1 for each router that forwards the packet?
Correct Answer: D
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.