Noun

Singular IP address

Plural IP addresses

IP address (plural IP addresses)

  1. (Internet) (Internet Protocol address) A number assigned to each computer's or other device's network interface(s) which are active on a network supporting the Internet Protocol, in order to distinguish each network interface (and hence each networked device) from every other network interface anywhere on the network. (Normally written out in dotted decimal form, e.g. 127.242.0.19).

Synonyms

Related terms

From Wiktionary under the GNU Free Documentation License.
Fri Feb 5 16:02:14 2010

An Internet Protocol (IP) address is a numerical label that is assigned to devices participating in a computer network that uses the Internet Protocol for communication between its nodes. An IP address serves two principal functions: host or network interface identification and location addressing. Its role has been characterized as follows: "A name indicates what we seek. An address indicates where it is. A route indicates how to get there."

The designers of TCP/IP defined an IP address as a 32-bit number and this system, known as Internet Protocol Version 4 or IPv4, is still in use today. However, due to the enormous growth of the Internet and the resulting depletion of available addresses, a new addressing system (IPv6), using 128 bits for the address, was developed in 1995 and last standardized by RFC 2460 in 1998. Although IP addresses are stored as binary numbers, they are usually displayed in human-readable notations, such as 208.77.188.166 (for IPv4), and 2001:db8:0:1234:0:567:1:1 (for IPv6).

The Internet Protocol also routes data packets between networks; IP addresses specify the locations of the source and destination nodes in the topology of the routing system. For this purpose, some of the bits in an IP address are used to designate a subnetwork. The number of these bits is indicated in CIDR notation, appended to the IP address; e.g., 208.77.188.166/24.

As the development of private networks raised the threat of IPv4 address exhaustion, RFC 1918 set aside a group of private address spaces that may be used by anyone on private networks. They are often used with network address translators to connect to the global public Internet.

The Internet Assigned Numbers Authority (IANA), which manages the IP address space allocations globally, cooperates with five Regional Internet Registries (RIRs) to allocate IP address blocks to Local Internet Registries (Internet service providers) and other entities.

From Wikipedia under the GNU Free Documentation License
Sat Mar 6 16:44:28 2010

What is the difference between ethernet address and IP address?
Q. I have no knowledge about ethernet address. Can anyone please tell me what is ethernet address and its role in security. If someone knows my PC ethernet address, how would it affect my security? What can he do with that ethernet address? I have some knowledge about IP address, many ways of tracing and hiding IP, but I don't know if ethernet address can also be traced. I really wanna know ethernet address is useful for what purpose? Thanks for any help. Please help me!
Asked by girlsamurai - Wed Sep 2 03:04:16 2009 - - 3 Answers - 0 Comments

A. An IP address is just a pointer to a location on a network. Whether that be a local network, or the internet. When you say "ethernet address", I'm assuming you refer to your IP address on your local area network. There are 3 groups of reserved IP address space for private networks, these cannot be used as an internet IP. They are: 10.0.0.0 - 10.255.255.255 172.16.0.0 - 172.31.255.255 192.168.0.0 - 192.168.255.255 So your Ethernet IP is the address of your computer on your local network. Other computers and devices on the network will have a similar IP. For example a common one is to have 192.168.1.1 as your router/modem IP, and 192.168.1.X as your PCs IP. As for security, there is really no issues with people knowing it. If… [cont.]
Answered by Tech Monkeys - Wed Sep 2 03:17:56 2009

How to find the ip address of a client machine from a web application?
Q. I need to find the IP address (or the MAC address) of the actual machine that is using my web application. Getting it from the server variables at the server end will not work because the user machines are behind proxies. I need a client-side scripting solution. The users are agreeable to the web application checking for their machine IP and will allow it.
Asked by msk - Thu Sep 20 14:03:35 2007 - - 1 Answers - 2 Comments

A.
related terms: Ip Address Ip Addresses Network Ethernet Address
Private Networks Internet Protocol Addressing Device
Network Interface Protocol Ipv4 Identification

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