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Kako IPv6 mreže donose revoluciju na Internet

How IPv6 will revolutionise the internet

IPv6 is finally rolling out onto the internet. We’ve been waiting for this to happen for nearly ten years now. On 6 June 2012 we celebrated World IPv6 Day. This event marked a commitment by many major ISPs, home networking equipment manufacturers, and web companies around the world to permanently enable IPv6 for their products and services. In the very long-term, this will revolutionise the internet.

The number of unique addresses available under IPv6 is difficult to express in non-mathematical terms. Wikipedia describes the number as 2^52 addresses for every observable star in the known universe. One of the nicest descriptions I have seen is that there are enough IPv6 addresses for every atom on the surface of the earth, and enough left over for another 100+ earth-sized planets. The idea that we could ever run out of IPv6 addresses is beyond imagining. So how did we get to this?

For a long time now I have seen endless articles stating that we are rapidly running out of IPv4 addresses. Most of these articles rave on about how every device that connects to the internet needs a unique IP address. That’s not exactly true, and if it was the case, we would have run out of addresses years ago. The truth is a lot more subtle than that. In most businesses, and even on home networks, we take advantage of a technologies like Network Address Translation (NAT), IP forwarding and port forwarding in order to connect to the internet. Most of these devices use a private address range and rely on one or two internet connected devices (routers or gateways) to handle internet connectivity. That means that a single public IP address can be used to allow hundreds of people to connect to the internet at once. IPv4 has a total of 4 294 967 296 unique addresses.

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