IPv4 is most widespread implementation of IP protocol. It has 32 bit adress space, so it allow to use almost 232=4,294,967,296 addresses in internet. Because of the fact that these addresses are almost run out a new version of IP, IPv6 revealed.
These IPv4 addresses are run out of although CIDR,NAT,Priviate Addresses techniques are used to alleviate this shorthage.
The middle one, IPv5 is used for “Internet Streaming Protocol” for research and development, so IP protocol developers continue the way with version 6.
The new and the next generation version of IP, IPv6 has 128 bit address space.So there are almost 2128 available addresses for this devices.This is almost 340 undecilion available addresses, nearly unlimited.
To sum up the features coming with the IPv6;
- Increased address space
- Simplified configuration (with auto configuration)
- Integrated security (IPSec)
- Backward compatibility with IPv4
Different than IPv4, IPv6 addresses written with hexadecimal digits.This address is consist of eight colons and in each colons there are four digits.So the address become 8*4*4bit = 128 bit.An example of an IPv6 address is below:
- • Leading zeros can be dropped like below: