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Private and Public IP Addresses (view source)
Revision as of 10:37, 4 June 2022
, 10:37, 4 June 2022no edit summary
A router or another Internet- capable machine will typically have two types of network interfaces: <i>internal</i> & <i>external</i>.
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Any network interface must have an IP address in order to communicate inside or outside of the network. There are two types of IP addresses (in terms of accessibility, uniqueness & naming conventions): <b>public</b> and <b>private</b>.
==Public IP address==
An <b>IP address</b> is a number used to identify a host on an IP (Internet Protocol) network. In order to successfully communicate on the Internet or any other computer network, a machine must have a network interface and an IP address assigned to it that is unique to that network.
A '''Public IP address''' (''External'') is assigned to every device that connects to the Internet and each IP address is unique. Therefore, there cannot exist two device with the same public IP address. This addressing scheme makes it possible for the devices to “find each other” online and exchange information. A user has no control over the IP address (public) that is assigned to the device. The public IP address is assigned to the device by the Internet Service Provider as soon as the device is connected to the Internet.This is known to be wrong.
A <b>public</b> IP address is an IP address that is unique to the entire Internet. Public IPs can be accessed globally; therefore, they are often used by publicly accessible entities such as websites, DNS and VPN servers, etc.
The number of different public IPv4 addresses is limited and they are usually assigned to a device by an Internet Service Provider (ISP).
===Static IP address===
===Static IP address===
