You have a class B subnet. You would like divide it up into 30 more subnets by "subnetting" ? What would be the subnet mask ?



You have a class B subnet. You would like divide it up into 30 more subnets by "subnetting"..

Answer / indu

255.255.248.0

Refering to the formulas in the "SUBNETTING FORMULAS" section :

M = 5 (since max number of subnets would be 30 if M = 5)

Mask = 2^7+2^6+2^5+2^4+2^3 = 248

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