What is IP Address

What is IP Address?

Internet Protocol Address (or IP Address) is an unique address that computing devices use to identify itself and communicate with other devices in the Internet Protocol network. Any device connected to the IP network must have an unique IP address within its network. An IP address is analogous to a street address or telephone number in that it is used to uniquely identify a network device to deliver mail message, or call ("view") a website.

Dotted Decimals

The traditional IP Addresses (IPv4) uses a 32-bit number to represent an IP address, and it defines both network and host address. Due to IPv4 addresses running out, a new version of the IP protocol (IPv6) has been invented to offer virtually limitless number of unique addresses. An IP address is written in "dotted decimal" notation, which is 4 sets of numbers separated by period each set representing 8-bit number ranging from (0-255). An example of IPv4 address is 216.3.128.12, which is the IP address assigned to topwebhosts.org.

An IPv4 address is divided into two parts: network and host address. The network address determines how many of the 32 bits are used for the network address, and remaining bits for the host address. The host address can further divided into subnetwork and host number.

what is my ip address

What is an IP address?

Every computer connected to the internet has a unique public address known as an IP address. The current IP address space (IPv4) consists of 4,294,967,298 addresses. Of these addresses some are reserved for private networks (about 18 million) and others for multicast (about 270 million), so in theory there can never be more than 4 billion computers and servers connected to the internet at any given moment. This is a limiting factor since there are about 7 billion people on earth. There is a new addressing schema being implemented (IPv6) that has 340,282,366,920,938,463,463,374,607,431,768,211,456 possible addresses.

Why does my IP address change?

Some providers want to discourage their clients from running a server (mail, ftp, game or other) on their computer and therefore change the public IP address the user gets regularly. Other providers have fewer addresses than they have subscribers and therefore assign a random address to each user when he connects to the internet and assign that same address to another user after he disconnects. Both these processes are usually done by the Dynamic Host Configuration Protocol server (DHCP server).

What would I need my IP address for?

Some people want to run a mail, ftp or game server on their computer and for that software to run it is usually necessary to enter the public IP address currently assigned to the user into the configuration. Other people would like to use a remote desktop application and want to know what IP address to connect to from a remote location.

How does an IP address look?

The currently used IP addresses (IPv4) look like four blocks of digits ranging from 0 to 255 separated by a period like "192.168.0.255".In the new schema (IPv6) addresses can be written in different ways:

    2001:2353:0000:0000:0000:0000:1428:57ab
    2001:2353:0000:0000:0000::1428:57ab
    2001:2353:0:0:0:0:1428:57ab
    2001:2353:0::0:1428:57ab
    2001:2353::1428:57ab