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The IP address 127.0.0.1 is a special purpose address reserved for use on each computer.127.0.0.1 is conventionally a computer'sloopback address.
Network software and utilities can use127.0.0.1 to access a local computer's TCP/IP network resources. Messages sent to loopback IP addresses like127.0.0.1 do not reach outside to the local area network (LAN) but instead are automatically re-routed by the computer's own network adapter back to the receiving end of the TCP/IP stack.
Typically all IP addresses in the range127.0.0.1 -127.255.255.255 are reserved for private use, but127.0.0.1 is by convention the loopback address in almost all cases.
A loopback address, a non-routable IP address .
That means any packet sent to one of those16,777,214 addresses (127.0.0.1 through127.255.255.254) will be looped back. IPv6 has just a single address, ::1. Localhost may also be mapped to other IPv4 loopback addresses, and additional synonyms may be assigned to any loopback address.
