Host name-to-IP address resolution is accomplished through System Properties affecting how IPv4 and IPv6 addresses are used. The textual representation of an IP address is address family specific.įor IPv4 address format, please refer to Inet4Address#format For IPv6Īddress format, please refer to Inet6Address#format. Global addresses are unique across the internet. Inside of a site without the need for a global prefix. Site-local addresses are designed to be used for addressing Neighbor discovery, or when no routers are present. On a single link for purposes such as auto-address configuration, Link-local addresses are designed to be used for addressing A packet sent to a multicast address isĭelivered to all interfaces identified by that address. This address is often used when testing aĪn identifier for a set of interfaces (typically belonging IP address loops around and becomes IP input on the local The Loopback Addresses - This is the addressĪssigned to the loopback interface. The unspecified address must not be used as Interface, in case the server host has multiple interfaces. One example of its use is as the target ofīind, which allows a server to accept a client connection on any The Unspecified Address - Also called anylocal or wildcardĪddress. A packet sent toĪ unicast address is delivered to the interface identified by With a host name or whether it has already done reverse host nameĪn identifier for a single interface. InetAddress consists of an IP address and possibly itsĬorresponding host name (depending on whether it is constructed The IP address architecture is defined by RFC 790:Īddress Allocation for Private Internets, RFC 2365:Īdministratively Scoped IP Multicast, and RFC 2373: IP Used by IP, a lower-level protocol on which protocols like UDP and This class represents an Internet Protocol (IP) address.Īn IP address is either a 32-bit or 128-bit unsigned number

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