What are the advantages of IPv6? Discuss whether an IPv6 network can support IPv4 packets and, if so, how?
What will be an ideal response?
Advantages of IPv6:
-The 128-bit address space of IPv6 can support 2128 IP addresses, instead
of the 232 addresses provided by IPv4, which is supposed to solve the
problem of limited address space once and for all.
-IPv6 has a fixed header size, while the IPv4 had a variable header size.
-IPv6 has fewer fields in the basic header, which results in faster packet
processing.
-In IPv6, the routers do not perform any fragmentation, unlike IPv4.
-IPv6 supports authentication and encryption.
An IPv6 network can also support packets with IPv4 addressing that might
be needed for the transition period. It might happen that the two end
systems support IPv6, but the packet needs to travel through an
intermediate IPv4 system. In this case, the packet needs to have an IPv4
address. The sender can encapsulate the IPv6 packet within an IPv4 packet
(tunneling) and it sets the protocol number. Here, the end system uses a
compatible IP address. For example, the IPv4 address 2.13.17.14 becomes
0:020D:110E.
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What will be an ideal response?