Sub netting Basics

Sub Net (Network within a network)

10 Hosts

192.168.32.0
(Sub Net Mask=255.255.255.0)

11000000.10101000.00100000.00000000
               Network ID                 Host ID

How many bits are required for 10 Hosts?
4 Bits (2*2*2*2=16 host ID’s)
            1  2  3  4 BITS

11000000.10101000.00100000.00000000
               Network ID                        Host ID
                                                   Subnet ID

29 Hosts

How many bits are required for 29 Hosts?
5 Bits (2*2*2*2*2=32 host ID’s)
            1  2  3  4  5 BITS 

11000000.10101000.00100000.00000000
               Network ID                        Host ID
                                                   Subnet ID


Real Sub Net ID                           21       21
11000000.10101000.00100000.00100010
               Network ID                        Host ID
                                                   Subnet ID
Sub Net ID=2
Host ID=2

192.168.32.34

       Sub Net Mask=255.255.255.240
11000000.10101000.00100000.11110000