7 How would you express the entire Class B address space as a single

CIDR advertisement?

Since the leading two bits of all Class B addresses are  10 , the entire

Class B address space can be expressed as 128/2. 

8 How would you express the entire Class C address space as a single

CIDR advertisement?

Since the leading three bits of all Class C addresses are  110 , the

entire Class C address space can be expressed as 192/3. 

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