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

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