ACtE08 · Chapter 8Programming & Applications🏛️ Past Licensure QuestionID: 3aaac319
In IPv4 classful network addressing, which decimal range in the first octet identifies a Class C network?
In IPv4 classful network addressing, which decimal range in the first octet identifies a Class C network?
Multiple Choice Options
- A
0 - 127
- B
128 - 191
- C
224 - 239
- D✓ Correct Option
192 - 223
Detailed Technical Solution & Explanation
In original IPv4 classful network architecture, the class is determined by the highest-order bits of the first octet:
•
Class A: High-order bits
0 (default mask /8)•
Class B: High-order bits
10 (default mask /16)•
Class C: High-order bits
110 (default mask /24)•
Class D (Multicast): High-order bits
1110 •
Class E (Experimental): High-order bits
1111 Option Analysis:
•
Option A (0 - 127): Identifies IPv4 Class A.
•
Option B (128 - 191): Identifies IPv4 Class B.
•
Option C (224 - 239): Identifies IPv4 Class D (Multicast group addressing).
•
Option D (192 - 223): Correct; standard decimal range identifying Class C networks.
Reference: Demo2 · Set 2NEC Licensure Syllabus