internetworking vlsm notes

last thing to cover - VLSM variable length subnet masking
 variable length subnet masking
 variable length in our subnet mask to make for a more efficent use of the neworking scheme in our topology
 doing /30 means i only have two (for wan connections) hosts per subnet which is all i need

 50 = .0/26
 25 = .64/27
 2  = .96/28
 2  = /30
 2  = /30
 2  = /30





/24 =       .0                        1NET  254 usable hosts/subnet (not really a subnet, more like network at this point)
/25 =   .0      .128                  2SNET 126 usable hosts/subnet
/26 = [.0] .64 .128 .192              4SNET 62 usable hosts/subnet
/27 =    {.32} [.64] .96 .128 .160 .192 8SNET 30 usable hosts/subnet
/28 =                [.96]              16SNET 14 usable hosts/subnet
/29 =                     .112 .120     32SNET 6 usable hosts/subnet
/30 =                  .112 .116 .120   64SNET 2 usable hosts/subnet

    ^^^^^^^^^
"VLSM in a nutshell"