1. What is the subnet mask for a class A network in which four bits have been used for subnetting
2. How many usable subnets are created if ten bits are borrowed using a class B address ?
3. Refer to the subnets created in Q2. How many usable host addresses are available in each subnet ?
4. Five bits are used for subnetting with class C address 201.45.67.0 In which usable subnet (i.e. 1st , 2nd etc ) is host 201.45.67.25