Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [Z] ) coommunication ) multicasting 128-bit addresses 16-bit network addresses subnetting 2nd 3rd 4th 172.16 reserved spaces, mathematical limits of 192.168 reserved spaces, mathematical limits of 2-bit masks subnetting 2nd 3rd 20-bit addresses 24-bit addresses 24-bit network addresses subnets 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th 15th 16th 24-bit networks VLSM subnetting with 2nd 3rd 4th 5th 6th 7th 3-bit format prefixes 3-bit masks subnetting 2nd 3rd 4th 4-bit masks subnetting 2nd 5-bit masks subnetting 2nd 6-bit masks subnetting 2nd 3rd 6-to-4 tunnels |