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The IP address of the destination is used to make decisions about routing IP packets to other networks. IPv6 is the successor to the first addressing infrastructure of the Internet, Internet Protocol version 4 (IPv4). In contrast to IPv4, which defined an IP address as a 32-bit value, IPv6 addresses have a size of 128 bits.
Unicast address assignments by a local Internet registry for IPv6 have at least a 64-bit routing prefix, yielding the smallest subnet size available in IPv6 (also 64 bits). With such an assignment it is possible to embed the unicast address prefix into the IPv6 multicast address format, while still providing a 32-bit block, the least ...
An Internet Protocol address (IP address) ... IPv4 addresses are defined as a 32-bit number, ... The smallest possible individual allocation is a subnet for 2 64 ...
Used for link-local addresses [5] between two hosts on a single link when no IP address is otherwise specified, ... IPv4-translated addresses 64:ff9b::/96 64: ...
Both the IPv4 and the IPv6 specifications define private IP address ... addresses, but contain a 40-bit random number ... addresses in subnet 48 bits 16 bits: 64 bits ...
Packets that hold Internet Protocol data carry a 4-bit IP version number as the first field of its header. [ 1 ] [ 2 ] Currently, only IPv4 and IPv6 packets are seen on the Internet , having IP version numbers 4 and 6, respectively.
Similar to a unicast address, the prefix of an IPv6 multicast address specifies its scope, however, the set of possible scopes for a multicast address is different. The 4-bit scope field (bits 12 to 15) is used to indicate where the address is valid and unique.
NAT64 is an IPv6 transition mechanism that facilitates communication between IPv6 and IPv4 hosts by using a form of network address translation (NAT). The NAT64 gateway is a translator between IPv4 and IPv6 protocols, [1] for which function it needs at least one IPv4 address and an IPv6 network segment comprising a 32-bit address space.