IP Address (Internet Protocol Address)
Tuesday, November 23, 2010|
adminInternet Protocol address (IP address) is a numerical label that is assigned to any device participating in a computer network that uses the Internet Protocol for communication between its nodes. In other words, it is an address that is assigned to any device that is connected to a network that follows the Internet Protocol, .
An IP address serves two principal functions:
- host or network interface identification
- location addressing
Internet Addresses Classes.
- Class A: supports 16 million hosts on each of 126 networks, Range of first octet is 0 - 127
- Class B: supports 65,000 hosts on each of 16,000 networks, Range of first octet is 128 - 191
- Class C: supports 254 hosts on each of 2 million networks, Range of first octet is 192 - 223
Every computer, whether it be a Web server or the computer you're using right now, requires an IP address to connect to the Internet. IP addresses consist of four sets of numbers from 0 to 255, separated by three dots. For instance "124.6.181.54".
Your Internet Service Provider (ISP), will assign you either:
- Static IP Address: which is always the same
- Dynamic IP Address: which changes everytime you log on
An IP address has two parts:
- identifier of a particular network on the Internet
- identifier of the particular device (which can be a server or a workstation) within that network.
In the most widely installed level of the Internet Protocol (IP) today, an IP address is a 32-bit number that identifies each sender or receiver of information that is sent in packets across the Internet. When you request an HTML page or send e-mail, the Internet Protocol part of TCP/IP includes your IP address in the message (actually, in each of the packets if more than one is required) and sends it to the IP address that is obtained by looking up the Domain Name in the Uniform Resource Locator you requested or in the e-mail address you're sending a note to. At the other end, the recipient can see the IP address of the Web page requestor or the e-mail sender and can respond by sending another message using the IP address it received.
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