The final notation type includes IPv4 addresses. Because many IPv6 addresses are extensions of IPv4 addresses, the right-most four bytes of an IPv6 address (the right- most two byte pairs) can be rewritten in the IPv4 notation. This mixed notation (from the above example) could be expressed as:

E3C5:4AC8:192.168.100.32

IPv6 Reserved Addresses

IPv6 reserves two addresses that network nodes can’t use for their own communication purposes:

0:0:0:0:0:0:0:0 (unspecified address, internal to the protocol)

0:0:0:0:0:0:0:1 (loopback address, just like127.0.0.1 in IPv4)

IPv6 Addressing Model

IPv6 addresses are assigned to interfaces (for example, your Ethernet card), and not nodes (for example, your computer). A single interface can be assigned multiple IPv6 addresses. Also, a single IPv6 address can be assigned to several interfaces for load sharing. Finally, routers don’t need an IPv6 address, eliminating the need to configure the routers for point to point unicasts. Additionally, IPv6 doesn’t use IPv4 address classes.

IPv6 Address Types

IPv6 supports the following three IP address types:

Unicast (one to one communication)

Multicast (one to many communication)

Anycast

Note that IPv6 does not support broadcast. Multicast is preferred for network broadcasts. Otherwise, unicast and multicast in IPv6 are the same as in IPv4. Multicast addresses in IPv6 start with “FF” (255).

Anycast is a variation of multicast. While multicast delivers messages to all nodes in the multicast group, anycast delivers messages to any one node in the multicast group.

Chapter 7 IPv6 Support

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Apple 034-2351_Cvr manual IPv6 Reserved Addresses, IPv6 Addressing Model, IPv6 Address Types

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