Currently most nodes on the Internet using the IP protocol version four (IPv4), wherein the length of the IP-address is 4 bytes (32 bits), and the address is written as four numbers separated by periods.The range of possible numbers - from 0 to 255. The main problem of this protocol is that nodes in the global network is becoming more and soon IP-addresses will simply cease to miss .Therefore, there was a protocol IPv6.
IPv6 protocol was developed by the Internet Engineering Council (IETF), responsible for the development of protocols and architecture of the World Wide Web.Unlike the previous version, length of the address in the protocol IPv6 is 128 bits , which allows for unique addresse
Development of a new Protocol began in the '90s, when it became clear that the exhaustion of IPv4-address inevitable.Inside Google translation to IPv6 was launched in 2008.In June 2011 the International Day of IPv6 - an event dedicated to the testing of readiness for mass migration to the new protocol. June 6, 2012 held worldwide launch of a new version of the protocol IP .
What does this mean? Most companies in one way or another connected with the Internet and networks will be gradually transferred to the new protocol .For example, Internet service providers include it for at least one percent of users, routers, it will be activated as the default setting, large web companies (search engines, social networks and so on. N.) Include it on their main website.
IPv6 is not only increases the range of available IP-addresses .From the new protocol have been removed are things that complicate the work of routers, in particular, the checksum and splitting the package into parts.Have been introduced and some other improvements.
However complete rejection of the use of IPv4 protocol is not planned , because a huge number of devices not yet support IPv6.Both protocols are used in parallel, a proportion of IPv6 traffic over IPv4 will gradually increase.There were developed special technology for converting addresses in both directions and thus allow IPv6 networks to communicate with networks IPv4.
Address IPv6 addresses differ from IPv4.As we have said, the address IPv4 - is four groups of numbers ranging from 0 to 255 separated by periods. IPv6 address is written in hexadecimal and represents the eight groups of four digits, used to separate groups of colon .Recall that as hexadecimal digits are used not only decimal numbers from 0 to 9 and letters from A to F.
Since the address is long, provides for the possibility of reducing .If one or more consecutive groups are equal to 0000, they can be omitted and replaced by a double colon.It is impossible to reduce to zero the two groups separated, as this can lead to ambiguity.When using an IPv6 address in the URL it is enclosed in square brackets, if necessary, indicate the port he wrote after the brackets.
Some IPv6 addresses have been reserved for special purposes , t. E. They may not be globally routable.This, for example, the address :: - the default gateway (default gateway), an analog of the address 0.0.0.0 in IPv4;address :: 1 - loopback interface, accessible only from the local machine (localhost), analogue of address 127.0.0.1 in IPv4.
Daylight protocol IPv6 - it's only a matter of time .As we said, the IPv4 protocol will not disappear any time soon, but the share of these addresses in the network will gradually decrease.New equipment and new versions of the operating system by default supports IPv6.By the way, to check whether a new version of the protocol your computer, just click on this link.