Network - IP Address (Unique network IDentifier)

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1 - About

A Network address in the Internet protocol, assigned to a network adapter.

An IP address functions as a unique ID for identifying the sender and the receiver in a network with multiple hosts.


3 - Syntax

An IP address is comprised of:

The host identifier is represented in the form nnn.nnn.nnn.nnn, where nnn is a number from 0 to 255 (for example, or

All hosts on a subnetwork have the same network prefix, unlike the host identifier which is a unique local identification.

4 - Relation

5 - Wildcard

The wildcard IP address match any possible machine.

6 - Type

6.1 - Public

In order to maintain uniqueness within global namespace, the IP addresses are publicly registered with the Network Information Center (NIC) to avoid address conflicts.

The devices that need to be publicly identified, such as web or mail servers, must have a globally unique IP address; and they are assigned a public IP address.

To determine the public IP address, if the computer is:


6.2 - Private

The devices that do not require public access may be assigned a private IP address and make it uniquely identifiable within one organization.

For example, a network printer may be assigned a private IP address to prevent rest of the world from printing from it.

To allow organizations to freely assign private IP addresses, the NIC has reserved certain address blocks for private use. See private

7 - To hostname

8 - Documentation / Reference