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

Answer is C) 128-191

IP Address Class                                    Range of First Octet Values (decimal)

CLASS A                                                          1-127

CLASS B ADDRESS    128-191

CLASS C ADDRESS                                     192-223

CLASS D                                                     224-239

CLASS E                                                   240 to 255