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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. Using the loopback interface bypasses any local network interface hardware.
The hosts file is one of several system facilities that assists in addressing network nodes in a computer network. It is a common part of an operating system's Internet Protocol (IP) implementation, and serves the function of translating human-friendly hostnames into numeric protocol addresses, called IP addresses, that identify and locate a host in an IP network.
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.
The string "localhost" will attempt to access the file as UNC path \\localhost\c:\path\to\the file.txt, which will not work since the colon is not allowed in a share name. The dot "." The dot "." results in the string being passed as \\.\c:\path\to\the file.txt , which will work for local files, but not shares on the local system.
NAT hairpinning, also known as NAT loopback or NAT reflection, [26] is a feature in many consumer routers [27] where a machine on the LAN is able to access another machine on the LAN via the external IP address of the LAN/router (with port forwarding set up on the router to direct requests to the appropriate machine on the LAN).
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MXlo means DNS resource records of the MX type [1] that have a value of localhost.The name comes from combining the MX from Mail eXchange and the lo abbreviation for a loopback networking interface, and is an anti-spam technique that is growing in popularity with network administrators who manage a large number of unused legacy domain names.
::1 / 128 – The loopback address is a unicast localhost address. This address corresponds to 127.0.0.1 / 8 in IPv4. If an application in a host sends packets to this address, the IPv6 stack loops these packets back on the same virtual interface. fe80:: / 10 – Addresses in the link-local prefix are only valid and unique on the local subnet.