RFC 1918 is a standard that defines a set of private IP addresses which can be used by organizations within their own networks. These addresses are not routable on the public Internet, and are therefore not reachable from outside the organization's network.
RFC 1918 addresses are often used in home and small office networks, where a public IP address is not required. Using RFC 1918 addresses can help to conserve IP addresses, as each organization can use a private address range which is not visible to the rest of the Internet.
RFC 1918 addresses are divided into three ranges:
10.0.0.0 - 10.255.255.255 (10/8 prefix)
172.16.0.0 - 172.31.255.255 (172.16/12 prefix)
192.168.0.0 - 192.168.255.255 (192.168/16 prefix)
What is the purpose of RFC 1918?
The purpose of RFC 1918 is to define a set of private IP addresses that can be used by organizations within their own networks. These addresses are not routeable on the public Internet, which means that they can only be reached by other devices on the same network. This can be useful for creating isolated networks that are not accessible from the outside world, or for conserving public IP addresses by using private addresses for devices that do not need to be reachable from the Internet.
Why was the RFC 1918 address space defined?
In order to allow for growth of the Internet, the IANA (Internet Assigned Numbers Authority) has set aside three blocks of the IP address space for private use:
* 10.0.0.0/8 - This block is commonly referred to as the "class A" private address space.
* 172.16.0.0/12 - This block is commonly referred to as the "class B" private address space.
* 192.168.0.0/16 - This block is commonly referred to as the "class C" private address space.
These blocks are not assigned to any specific organization, and they are not reachable from the public Internet. They are, however, reserved for use by private networks.
The RFC 1918 address space was defined in order to give organizations a way to create private networks that can communicate with each other without having to obtain public IP addresses. By using private IP addresses, organizations can keep their internal networks hidden from the public Internet.
What are the 3 private IP address ranges?
1. 10.0.0.0 - 10.255.255.255
2. 172.16.0.0 - 172.31.255.255
3. 192.168.0.0 - 192.168.255.255
Why can't a computer with an RFC 1918 IP address be used as a public facing Web server?
RFC 1918 addresses are private addresses that are not supposed to be routed on the public Internet. This means that a computer with an RFC 1918 address would not be able to communicate with computers on the public Internet, and would therefore not be able to function as a public-facing web server.
What three blocks of addresses are defined by the RFC 1918 for private network use?
There are three blocks of addresses that are defined by the RFC 1918 for private network use:
- 10.0.0.0/8
- 172.16.0.0/12
- 192.168.0.0/16