What is the valid number range for the first octet of a Clas

What is the valid number range for the first octet of a Class B network?

A. 0–126

B. 127–191

C. 128–191

D. 128–192

E. 192–223

Solution

C is correct. The first octet of a Class B address falls in the 128–191 range.

A, B, D, and E are incorrect. These are not valid ranges for Class B addresses.