VLSM SUBNETTING
HOW TO SOLVE VLSM SUBNETTING AND DIVISION OF A NETWORK USING AN EXAMPLE
VLSM, used in real scenarios. No fixed CIDRv values here.
VLSM- Variable Length Subnet mask
ex:200.100.70.0 is the Network-ID, divided into:
(A.)120 IP’s in one network
(B.)2 IP’s
(C.)62 IP’s
Note: always remember to arrange IP’s in descending order, here the case is 120>64>2
200.100.70.0/25 ========================================>Network ID
200.100.70.1 ======>First valid Host [of 1st set of 120 IP’s]
200.100.70.126======>Last Valid Host [of 1st set of 120 IP’s]
200.100.70.127 =======>broadcast IP
200.100.70.128/26 ========================================>N/w ID
200.100.70.123=======>First valid host [of 2nd set of 64 IP’s]
200.100.70.190=======>Last Valid Host [of 2nd set of 64 IP’s]
200.100.70.191 =======>broadcast IP
200.100.70.192 ========================================>N/w ID
200.100.70.193=======>First valid host [of 3rd set of 2 IP’s]
200.100.70.194=======>Last Valid Host [of 3rd set of 2 IP’s]
200.100.70.195 =======>broadcast IP
200.100.70.196 =======================================>N/w ID
In this way, subnetting is done and the network is divided into small networks.
Thank you.
If any queries feel free to mail me with “sub:VLSM-google question”
email: kotlagirishreddy.999@gmail.com
Linked-in: linkedin.com/in/kotla-girish-r-6a9452130