Question

IPv6 handles the possibility of fragmentation by requiring the:
A. sending host to discover the size of the path MTU and create packets within that size
B. sending host to create packets that will fit in the smallest known MTU of any network
C. routers along the delivery path to fragment packets as necessary to fit within the MTU of the hardware on the outbound port
D. sending host to specify (in an extension header) how the routers should fragment the data
E. none of these

Answer 1

Routers along the delivery path to fragment packets as necessary to fit within the MTU of the hardware on the outbound port.

How does IPv6 handle fragmentation?

• Because an IPv6 router cannot fragment an IPv6 packet, the router will produce an ICMP packet to inform the source that the packet is too large in size. This allows the IPv6 sender to execute fragmentation at the source.
• An IPv6 router must create an ICMP6 Type 2 packet addressed to the source of the packet with a Packet Too Big (PTB) code and the MTU size of the next hop if the packet is too big for the next hop since an IPv6 router cannot fragment an IPv6 packet.

To learn more about IPv6 packet refer,

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