Which three options are extension headers that are implemented in IPv6? (Choose three.)
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A. B. C. D. E. F.ADE.
IPv6 has a number of different extension headers that can be used to provide additional functionality beyond the basic IPv6 header. These extension headers are inserted between the IPv6 header and the upper-layer protocol header.
The three extension headers that are implemented in IPv6 are:
A. Routing Header: This header is used to specify the route that a packet should take through the network. It is used primarily by routers to determine the next hop for the packet. The routing header contains a list of addresses, each of which represents a router that the packet should be sent to.
B. Fragment Header: This header is used to fragment large packets into smaller packets that can be transmitted across a network. This is useful when the packet size exceeds the maximum transmission unit (MTU) of a particular link. The fragment header contains information about how the packet should be reassembled at the receiving end.
F. Path MTU Discovery Header: This header is used to determine the path MTU of a network path between two hosts. It is used to avoid fragmentation by determining the largest packet size that can be transmitted without fragmentation. The header contains a sequence of packets that are sent with varying packet sizes until the largest packet size that can be transmitted without fragmentation is determined.
The other options:
C. Quality of Service Header: IPv6 does not have a specific Quality of Service header. Instead, QoS is implemented through the use of flow labels in the IPv6 header.
D. Encapsulating Security Payload Header: This header is used to provide encryption and/or authentication for packets. It is part of the IPsec protocol suite, which is used to secure network traffic.
E. Generic Tunnel Header: This header is used to encapsulate packets in a generic tunnel. It is used to tunnel traffic between different networks or to provide virtual private network ( VPN) connectivity.
In summary, the three extension headers that are implemented in IPv6 are Routing Header, Fragment Header, and Path MTU Discovery Header.