What is RFC 1918?

RFC 1918, published in 1996, describe the reservation of Private IP address. . Private networks are segments of IP address space reserved by IANA for use within an organization. These addresses can be used by anyone without being officially assigned by a registry or an ISP. The three most popular blocks among RFC1918 addresses are 192.168/16, 10/8 and 172.16/12. That is 10.0.0.0 – 10.255.25.255, 172.16.0.0 – 172.31.255.255 and 192.168.0.0. – 192.168.255.255 The addresses in these blocks are called "private IP addresses" in the Internet vernacular.