IPv6 address — Wikipedia Republished // WIKI 2
IPv6 Address Types & Format Explained with Examples This tutorial explains IPv6 address terminology such as node, router, host, link and network including types of IPv6 address such as anycast address, multicast address, unicast address, link local address, site local address, loopback address, IPv4 compatible address in detail. An Internet Protocol Version 6 address (IPv6 address) is a numerical label that is used to identify a network interface of a computer or a network node participating in an IPv6 computer network and for locating it in the network. The size of an IPv6 address is 128 bits, compared to 32 bits in IPv4. The address space therefore has 2 128 = 340,282,366,920,938,463,463,374,607,431,768,211,456 addresses (approximately 3.4 × 1038 ). Some blocks of this space and some specific addresses are reserved for special uses . A unique local address (ULA) is an Internet Protocol version 6 (IPv6) address in the address range fc00:: / 7. Its purpose in IPv6 is analogous to IPv4 private network addressing. Unique local addresses may be used freely, without centralized registration, inside a single site or organization or spanning a limited number of sites or organizations. 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 sc (or scope) field (bits 12 to 15) is used to indicate where the address is valid and unique.
Unlike IPv4, IPv6 requires a link-local address on every network interface on which the IPv6 protocol is enabled, even when routable addresses are also assigned. Consequently, IPv6 hosts usually have more than one IPv6 address assigned to each of their IPv6-enabled network interfaces.
IPv6 - Ubuntu Wiki IPv6 Introduction. Internet Protocol version 6 (IPv6) is the successor to the well known IPv4 protocol, commonly known as IP. Your Ubuntu system comes with all you will need to use IPv6. This section focuses on getting IPv6 properly configured and running. In the early 1990s, growth of the Internet led to various problems with IPv4, including:
IPv4 address shortage - Simple English Wikipedia, the free
Auto-configured IPv6 address is known as Link-Local address. This address always starts with FE80. The first 16 bits of link-local address is always set to 1111 1110 1000 0000 (FE80). The next 48-bits are set to 0, thus: