Subnetting Quiz #1

This quiz is for understanding the math of subnetting, not for real world subnetting. Some of the sample solutions are actually supernets that wouldn't be used in the real world.
One Byte Subnetting
Network ID
to be subnetted
      0

Max number of subnets
 

Subnet Mask

Network ID of subnet 1

 

Right Total
   





Reference Table

Count from Right Count from Left
bit power value binary   sum power bit
1 2 1 00000001 11111111 255 256 8
2 4 2 00000010 11111110 254 128 7
3 8 4 00000100 11111100 252 64 6
4 16 8 00001000 11111000 248 32 5
5 32 16 00010000 11110000 240 16 4
6 64 32 00100000 11100000 224 8 3
7 128 64 01000000 11000000 192 4 2
8 256 128 10000000 10000000 X 2 1

Quick Reference by Richie Martinez

2 4 8 16 32 64 128 256
128 64 32 16 8 4 2 1
  192 224 240 248 252 254 255

 


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Quiz copyright 2002 Joe Orr