convert the first octet in Class B address range to binary.

A. 10000000-11111111
B. 00000000-10111111
C. 10000000-10111111
D. 10000000-11011111
E. 11000000-11101111

Answer: C

Explanation:
640-8114
The class B address range is 128.0.0.0-191.255.255.255. When looking at the first octet alone, the range is 128- 191. The binary number for 128 is 10000000 and the binary number for 191 is 10111111, so the value rang is 10000000-10111111.
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