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What Are Private IP Addresses?

April 15, 2012 | Comments: 0 | Views: 179

IP or Internet Protocol addresses are numerical signs which are assigned to every device connected to the internet. A device, be it a computer or a different electronic device which requires internet connection to function properly, must have an IP address assigned to it in order to be able to access the web. There is a total of 4294967296 or (2^32) IPs available, and the majority of those are public IPs. Public IPs are actually those who directly access the internet and are used by devices which go online. IPs have a format of x.x.x.x, where x equals all numbers between 0 and 255. Therefore, an example IP address is or

A relatively small number of IP numbers is reserved for private use. These reserved blocks are supposed to be used by private networks and routers internally and they will not be used to access the internet directly. There are several reserved blocks, but the most popular ones are the 192.168.x.x and 10.x.x.x blocks. The former is widely used by many router manufacturers and is basically a standard today, while the latter is rarely used anymore. In order to access a router's configuration panel, a private IP number is used. For example, Cisco and Netgear routers use the IP number as their default. Others manufacturers like Billion use Some producers use and

The IPv4 system is the basis of the internet as we know it today. However, due to the increase in internet usage in the last 10 years, we have run out of IP addresses. As of 2010, there are no more free available IPs. That means that they are all reserved and bought by various users (telecom companies, hosting companies, governments). In order to overcome this problem, a different system called IPv6 was created and it is supposed to solve this problem. IPv6 is a very advanced system which uses different nomenclature compared to IPv4 and it has a total of 2^128, which is roughly 3.4x10^38. However, the switch between these two systems will take some time, as it is a completely different system. However, once we switch onto IPv6, we won't be running out of addresses anytime soon, because there will probably never be enough devices to fill out the IPv6 quota.

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Source: EzineArticles
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