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The name localhost is a commonly defined hostname for the loopback interface in most TCP/IP systems, resolving to the IP addresses 127.0.0.1 in IPv4 and ::1 for IPv6.As a top-level domain, the name has traditionally been defined statically in host DNS implementations with address records (A and AAAA) pointing to the same loopback addresses.
In computer networking, localhost is a hostname that refers to the current computer used to access it. The name localhost is reserved for loopback purposes. [ 1 ] It is used to access the network services that are running on the host via the loopback network interface.
AAAA 28 RFC 3596 [2] IPv6 address record: Returns a 128-bit IPv6 address, most commonly used to map hostnames to an IP address of the host. AFSDB 18 RFC 1183
AAAA records, the method that prevailed, are comparable to A records for IPv4, providing a simple mapping from hostname to IPv6 address. The method using A6 records used a hierarchical scheme, in which the mapping of subsequent groups of address bits was specified by additional A6 records, providing the possibility to renumber all hosts in a ...
The character sequence of two slash characters (//) after the string file: denotes that either a hostname or the literal term localhost follows, [3] although this part may be omitted entirely, or may contain an empty hostname. [4] The single slash between host and path denotes the start of the local-path part of the URI and must be present. [5]
The format of a zone file is defined in RFC 1035 (section 5) and RFC 1034 (section 3.6.1). This format was originally used by the Berkeley Internet Name Domain (BIND) software package, but has been widely adopted by other DNS server software – though some of them (e.g. NSD, PowerDNS) are using the zone files only as a starting point to compile them into database format, see also Microsoft ...
A unique local address (ULA) is an Internet Protocol version 6 (IPv6) address in the address range fc00:: / 7. [1] These addresses are non-globally reachable [2] (routable only within the scope of private networks, but not the global IPv6 Internet).
As such it is similar to the other special domain names, such as .localhost. [1] However, .local has since been designated for use in link-local networking , in applications of multicast DNS (mDNS) [ 2 ] and zero-configuration networking (zeroconf) so that DNS service may be established without local installations of conventional DNS ...