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excuse me,but what an ip is?
| Showing posts 1-6 of 6 | Page 1 of 1 |
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 0  @ 02-02-2004 03:37 radiate86 | 3,311 posts
| *coughidontknoweithercough  | | 0 @ 02-02-2004 03:39 andro | 
42,248 posts
| An IP is an Internet Provider
An IP address is a series of numbers that identifies a specific server on the Internet
In simpler terms, it's a load of technobabble | | 0 @ 02-02-2004 03:40 Melinda | 493 posts
| Your IP address is the number they use to track down your computer. Your ISP is your Internet service provider. | | 0 @ 02-02-2004 03:42 andro |
42,248 posts
| Oops... I meant to say that an IP address identifies a specific computer on the internet, not a specific server... Every computer that's a part of the internet has an IP address... Even the computer that stores everything that's on this site  | | 0 @ 02-02-2004 03:46 flashgc | 8 posts
| An IP address is what ethernet networks use to find requested resources. It's just numbers which make little sense to people but is in fact how you surf the web, even though you may not be aware of it.
When you click on a link or type a url into the address bar your PC sends a request to a Domain Name Server which translates the url and responds with an IP address which your browser then uses to get the information you're after. It's a good system and works nicely most of the time. | | 0 @ 02-02-2004 03:49 andro |
42,248 posts
| Here's some information on IP addresses taken from my course notes...
The designers of TCP/IP created a uniform way of writing addresses, which in total consisted of 4,294,967,296 unique addresses. These addresses were originally intended for the use of about 4 billion computers, which thirty years ago might have seemed enough.
The IP address consists of Dotted Decimal Notation with one byte (8 bits) making up each decimal number between the dots.
e.g.
128.120.148.43
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(one byte)
1 byte = 8 bits.... So the IP address is said to be 32 bits.
32 bit space that can accommodate 4,294,967,296 addresses.
With 4 Billion addresses, it might seem incredible that it could fall short of demand. But the demise of the IPv4 was due to big business organizations and the use of address blocks. Address blocks are split into three sizes, and ordered into a Class. There are three types of address class:
Class A Addresses
This uses 24 of the 32 bits in the address space, reads from left to right:
- X.0.0.0
The number signifying "X" is a set number between 0 and 126, always beginning with a Binary 0. This is always the first part of a Class A address.
The numbers signified by "0" can range from 0 to 255 and these help create exclusive IP address. Altogether Class A addresses use up 50% of the 4 billion addresses available.
Class B Addresses
A Class B address will have the following characteristic:
- X.X.0.0
The two "0's" that create the exclusive address take up one half of the 32 bit address, so Class B Addresses are said to have a 16 bit address space.
All Class B addresses begin with a Binary 10 and comprise 25% of the 4 billion addresses available.
Class C Addresses
A Class C address will have the following characteristic:
- X.X.X.0
All Class C addresses begin with a Binary 110 and comprise 12.5% of the 4 billion addresses available.
Now you ask what is the remaining 12.5% taken up by? Well Class D and Class E also exist but Class D functions as a way of sending messages to multiple systems and Class E is reserved for investigational purposes.
Reasons Why IP Addresses Have Ran Out
Class A addresses will be allocated to a business that requires than 65,536 (Class B) IP addresses, even if the company doesnt require anywhere as near as 16 million addresses.
Class B would be allocated do businesses that required more than 256 (Class C) IP Addresses and Class C the remaining addresses would be allocated to small networks.
So this was the real reason IP addresses ran out, the fact that many businesses did not need anywhere near the amount of addresses they were allocated made the IPv4 system realise its serious fault and that a new system must be devised.
Introducing IPv6
IPv6 is a 128 bit address space that i layed out in a different way to IPv4, it lists as follows:
IPv6 address = x:x:x:x:x:x:x:x
(Each X representing 16 bits (double IPv4 address) written in Hexadecimal.
It is likely that you would come across a new IP Addresses looking something like the following:
FEDC:BA98  654:3210:FEDC:BA98 654:3210 but IPv6 luckily has some element of self organisation, so dealing with this shouldnt be too taxing.
If you actually try to calculate the amount of addresses that 128 bits could generate, you would come across:
340 billion billion billion billion (340 x 10 to the power of 38)!!!!!!
Conclusion
IPv6 will lead the way to solving the IP address shortage, whether we can understand it remains to be seen. As TCP/IP is the backbone to the internet, we must learn the new system just as we did the previous system.
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