IP Address

We are use internet different way in different work. In internet IP address is most important and most attractive part or we should not connect internet without IP address or IP address is a fascinating product of modern computer technology designed to allow one computer (or other digital device) to communicate with another via the Internet. IP addresses allow the location of literally billions of digital devices that are connected to the Internet to be pinpointed and differentiated from other devices. In the same sense that someone needs your mailing address to send you a letter, a remote computer needs your IP address to communicate with your computer. IP address supply for general host identification when communicating with other network devices using the TCP/IP procedure it purpose in IP networks. Typical (IPv4) address consists of four octets. For proper addressing the router also needs the network mask value, id set which bits of the complete IP address refer to the address of the host, and which – to the address of the network.

In other words IP address is an Internet Protocol address. An Internet Protocol is a set of rules that administer Internet activity and facilitate completion of a variety of actions on the World Wide Web. Therefore an Internet Protocol address is part of the methodically laid out interconnected grid that governs online communication by identifying both initiating devices and various Internet destinations, thereby making two-way communication possible. The network address value is calculated by binary AND operation from mask and IP address values. It’s also possible to specify IP address followed by slash “/” and amount of bits assigned to a network mask. In most cases it is enough to specify the address, the net mask, and the interface arguments. The network prefix and the broadcast address, the net ask, and the interface argument. The network prefix and broadcast address are calculated automatically. We can not have two different IP addresses from the same network assigned to the router. Unnumbered interfaces can be used on serial point-to point links, e.g. MOXA or Cyclades interfaces. A private address should be put on the interface with the network being the same as the address on the router on the other side of the p2p link (there ay be no IP on that interface, but there is an IP for the router). An IP address consists of four numbers, each of which contains one to three digits, with a single dot (.) separating each number or set of digits. Each of the four numbers can range from 0 to 255. This is known as "dotted decimal" notation. Example: 000.000.000.000

IP addresses can be either static or dynamic.

Static IP addresses: - Static IP addresses never change. Manually assign to the interface by a user. They serve as a permanent Internet address and provide a simple and reliable way for remote computers to contact you. They are generally preferable for such uses as VOIP (Voice over Internet Protocol), online gaming, or any other purpose where users need to make it easy for other computers to locate and connect to them. . Static IP addresses reveal such information as the continent, country, region, and city in which a computer is located, the ISP (Internet Service Provider) that services that particular computer and such technical information as the precise latitude and longitude of the country, as well as the locale, of the computer. Easy access can also be facilitated when using a dynamic IP address through the use of a dynamic DNS service, which enables other computers to find you even though you may be using a temporary, one-time IP address. This often entails an extra charge, however, so check with your ISP.

Dynamic IP addresses:-  dynamic IP address are temporary and are assigned each time a computer accesses the Internet.  it is automatically assigned to the interface by established  ppp, ppptp, or pppoe connections. They are, in effect, borrowed from a pool of IP addresses that are shared among various computers. Since a limited number of static IP addresses are available, many ISPs reserve a portion of their assigned addresses for sharing among their subscribers in this way. This lowers costs and allows them to service far more subscribers than they otherwise could.

Static IP addresses are considered somewhat less secure than dynamic IP addresses, since they are easier to track for data mining purposes. However, following safe Internet practices can help mitigate this potential problem and keep your computer secure no matter what type of IP address you use.