IP Version 6 Addressing Architecture

There are several types of unicast addresses in ipv6

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Unformatted text preview: ted, see Section 2.5.7), and Link-Local unicast. subtypes There are also some special-purpose of Global Unicast, such as IPv6 addresses with embedded IPv4 addresses. defined in Additional address types or subtypes can be the future. Hinden [Page 6] Standards Track RFC 4291 February 2006 IPv6 Addressing Architecture IPv6 nodes may have considerable or little knowledge of the internal structure of the IPv6 address, depending on the role the node plays (for instance, host versus router). At a minimum, a node may consider that unicast addresses (including its own) have no internal structure: | | 128 bits +----------------------------------------------------------------+ | | node address +----------------------------------------------------------------+ A slightly sophisticated host (but still rather simple) may additionally be aware of subnet prefix(es) for the link(s) it is attached to, where different addresses may have different values for n: | | n bits | 128-n bits +------------------------------+---------------------------------+ | | subnet prefix | interface ID +------------------------------+---------------------------------+ Though a very simple router may have no knowledge of the internal structure of IPv6 unicast addresses, routers will more generally have knowledge of one or more of the hierarchical boundaries for the operation of routing protocols. differ The known boundaries will from router to router, depending on what positions the router holds in the routi...
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