IPv4 and IPv6 are the versions of Internet Protocol which stands for Version4 and Version6 respectively. IP address is an unique value which represents a device over network. All the device over Internet must have a valid and Unique address to function normally.
IPv4 is a 32 bit numeric representation of devices over Internet, most widely used till date. It supports upto 4.3 billion (4,300,000,000) unique IP addresses. Seeing the continuing growth of Internet with more and more devices and users linking to Internet there was a need of better version of IP address which could support more users. Hence came IPv6 in 1995. An example of Ipv4 :82.175.219.112
IPv6 is a 128 bit numeric representation of devices over Internet. It supports as much as 340 trillion, trillion, trillion (340,000,000,000,000,000,000,000,000,000,000,000,000) unique IP address. This is sufficient to provide more than a billion of IP addresses to every human being on earth. Sufficient for centuries. With the invent of IPv6, we need not to bother about depleting Unique IP addresses. An example of IPv6is:2005:3200:230:7e:35dl:2874:2190
