Determining subnets to choose for VLSM?
I'm using the sybex book and in explaing the VLSM to me they don't do a good job of explaining how you determine which subnet ID to use for which networks. They explain about choosing the right block to correspond to the number of hosts you need and they have you draw up a chart and fill in the number of hosts needed, the block to use and the subnet mask, but it doesn't explain how to determine which subnets to use for which networks. To me, it seems like it would make the most sense to start out with all of the smallest blocks first and choose those IDs and then work you way up, but he doesn't do it that way he has you using the smallest blocks in like the 240s and 250s range. there seems to be no ryhme or reason, in the chart he first has you figure the subnet for a 32 block, then a 16, then 16, then 4, 4, 4, 16, 64, 16, 64, 16....wouldn't it make more sense to write up your chart and assign the masks and IDs in ascending order for the following blocks.. 4, 4, 4, 16, 16, 16, 16, 32, 64 and 64 and assign the masks in the order..