This was key to me understanding IPv6 - you don't really do variable length subnets. You just get a /48 and break that up into /64's. Because the space is so va

This was key to me understanding IPv6 - you don't really do variable length subnets. You just get a /48 and break that up into /64's. Because the space is so vast, you can do inefficient things with no chance of running into allocation issues like v4 and you don't have to mentally try and subnet a 128 bit address which maybe some can handle but hurts my head.