Behind all the names on the urls of Internet websites are a series of numbers called IP (Internet Protocol) addresses. IP stands for Internet Protocol, and constitute the dominant network inner for use on the Web.
The 127.0.0.1 IP
This particular IP address, also called a local great number, is the basis for which loopback network connections are processed. Loopback method going back, and that is what 127.0.0.1 does, because it is the address of your machine. Using telnet, ftp, or try in any way to get to 127.0.0.1, you will be transported back to the great number machine, yours. However, it is only the initial three numbers (127) that are needed; use any number combination with 127 and the consequence will be the same.
A frequent joke among programmers is to get the greenhorn to connect to this IP address. However, in reality the IP address has serious roles.
Uses and Purpose
There are several functional uses for this IP address. The most shared example would for a software developer or network systems administrator to try out new applications or experiment with rare set ups. This can also be used by programmers who design software that talks to each other by the computer.
This IP address is also used for beta testing a large number of web applications, from Java applets, Active X controls to web browsers.
It usually begins with the client sending out a message to server, which would be possible only if the 127.0.0.1 address is used. The consequence would be, if a web browser were to relay the request, a return to the great number page of the site
The other popular usage of the local great number IP address are gaming servers, which are interconnected to local hosts. By using the local hosts, the time of action and the flow of information becomes more streamlined and efficient.
Because it roles as a loopback, this IP address cannot be used in any network component or node.
Testing the Loopback similarities of 127.0.0.1
You do not need to be a computer programmer to test the loopback function of this address. You can go to the command prompt of your operating system, and at the c: kind the following: “ping 127.0.0.1”. After hitting the go into meaningful, you will get an answer like “Reply from 127.0.0.1…”.
If you kind in “ping localhost” instead of the numbers, the consequence would be the same, as localhost and 127.0.0.1 are the same.
You can also try it on telnet: assuming that the computer stated to you has the name “Dan” you will get the following consequence:
# telnet 127.0.0.1
Connected to dan
Escape character is ‘^]’
Currently IPv4 is the standard in use on the Internet today. Aside from 127.0.0.1, other reserved addresses are 10.0.0.0/8 (for private networks), 169.254.0.0/16 (for link local),
Others are 184.108.40.206/24 (relays from IPv6 to UPv4), 255.255.255 (for broadcast), 220.127.116.11/4 for Multicasts (former Class D network), 240.0.0.0/4 for Class E Network, 192.0.2.0/24 for Documentation and example code and 198.18.0.0/15 for Network benchmark tests; 172.16.0.0/12 is also used for private networks.