CLASS A EXAMPLE LAST ONE
Wednesday, October 29, 2008
moving on to class a
10.210.204.70/12
multiples of 8 .... 12 is not greater than 16 .. so multiple of 8 satisfying it is ...8...so to get 12 we need to add 4 more bits ...
there fore ..tick 4 bits horizontally and 4 bits vertically and game over
seeing the table under subnets it stops at 240..so remember we have only one multiple of 8 .. so only one 255 in subnet mask..
therefore subnet mask is 255.240.0.0
now seeing under bits section...it has stopped at 16 so...multiples of 16 or difference of 16 ..we need to start with zero ---- for class a x.0.0.0
subnet------------firsthost--------------lasthost-----------broadcast
10.0.0.0
10.16.0.0
10.32.0.0
etc till our ip
10.208.0.0-------10.208.0.1---------10.223.255.254-----------10.223.255.255
this satisfies our ip
10.224.0.0
hence in this way this can be determined
the crucial one
bits------------128------------64-----------32------16---8---4----2-- --1
subnets ---------*--------------*------------*------*
128--------------*
192-------------*
224--------------*
240--------------*
248
252
254
255
powers of 2 --------------------------------------- subnets--------------------------------------hosts (-2)
2
4
8
16
32
64
128
256
512
1024