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Is the IPv4 address pool completely exhausted now? |
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Not yet. 2-3 years till we get IPV6 mainstream. |
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The system still works because of supernetting and subnetting. Basically they have an IP address and split it into multiple IP addresses. At what level you split it increases the possible number of subnets. It's actually really complex, but it increases the possible number of IP addresses exponentially. Think of it this way. Let's say you have a cable or dsl modem in your house. That device has its own IP address on the network you get your service from. But the modem also assigns IP addresses to the devices in your house, whether they connect via wires or wirelessly. Now, the modem, to your ISP, belongs to a pool of IP addresses, but even within that the ISP probably has a limited number of addresses. So they are probably assigning addresses within addresses. It would be a good analogy to say IP4 is a lot like a fractal tree. IPv6 won't require supernetting or subnetting. |
