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Tuesday, March 15, 2011

IPv6 ADDRESSING


Internet Protocol version 6 (IPv6) is a version of the Internet Protocol (IP) that is designed to succeed Internet Protocol version 4 (IPv4). The Internet operates by transferring data in small packets that are independently routed across networks as specified by an international communications protocol known as the Internet Protocol. Each data packet contains two numeric addresses that are the packet's origin and destination devices. Since 1981, IPv4 has been the publicly used version of the Internet Protocol, and it is currently the foundation for mostInternet communications. The Internet's growth has created a need for more addresses than IPv4 is capable of. IPv6 allows for vastly more numerical addresses, but switching from IPv4 to IPv6 may be a difficult process.

An ipv6 address is represented by eight blocks of four hexadecimals digits separted by colon. Each block of  ipv6 address represents a 16-bit number.The following is the example of ipv6 address.

2001:0db8:3c4d:0015:0000:0000:abcd:ef12
 
The preceding address can also be represented after eliminating the leading zeroes in the address: 
2001:db8:3c4d:15:0:0:abcd:ef12 
The preceding address can also be shortened further by replacing all adjacent zeros blocks by a single set of double colons(only once in the IP address), as follows:

2001:db8:3c4d:15::abcd:ef12

For the Detail of IPv6 Click on the image below:


Types of Ipv6 Addresses:-

(1)-LINK LOCAL
ü                        Self-Generated
ü                       Only works in LAN(Local Area Network)
ü                        FE80::/10
(2)-UNIQUE LOCAL
ü                       Private IP
ü                        Fc00::/7
(3)-GLOBAL IP
ü                      Public IP
ü                       2001::/3