ccna labs           

  Packet Tracer Labs

 

Class C Subnetting
 

Available Subnet - 215.37.1.0/24

Required subnets – 25

   
Process

 

Convert subnet mask to Binary
 


/24 = 255.255.255.0 = 11111111.11111111.11111111.00000000

                                              subnetting                                             subnetting                         

                          All ones represents the network       zeroes represents the hosts


--------------------------------------------------------------------------------


Find an increment

2^n = subnets (n = numbers of bits required)


To find out required bits, multiply 2x2 until you get required subnets number or bigger number

In this scenario we need 25 subnets and we are getting number 32 by
2x2x2x2x2 = 32,

2^5 = 32 subnets

We need to convert five bits to get 25 subnets

We have to change hosts bits into network bits to get more subnets

11111111.11111111.11111111. 11111000
       8              8                8               5subnet
                                                                    Five hosts bits are now network bits

Count all the ones to get new subnet mask

Our new subnet mask is /29 = 255.255.255.11111000

                                                                     subnetting 

                                                      128+64+32+16+8=248

                                                        = 255.255.255.248


128   64   32   16   8   4   2   1

  1      1     1        1   0   0   0        8 is the smallest network bit

                                  subnetting address     We will find our network ranges using 8 as a increment


--------------------------------------------------------------------------------

Network ranges

 
215.37.1.0------------------      215.37.1.7
             +8  binary subnetting  (Increment)
 
215.37.1.8------------------      215.37.1.15
             +8

215.37.1.16-----------------    215.37.1.31
              +8

215.37.1.32-----------------    215.37.1.39
              +8

215.37.1.40-----------------    215.37.1.47
              +8

215.37.1.48-----------------    215.37.1.55
              +8

215.37.1.56-----------------    215.37.1.63
              +8

215.37.1.64-----------------     215.37.1.71 and so on

 

 

 

 

 

 

 

       
Share this page
Facebook Twitter Reddit