ACtE08 · Chapter 8Mock Test 06🏛️ Past Licensure QuestionID: 23663a3f
Which of the following represents the subnet mask corresponding to a /15 CIDR network prefix?
Which of the following represents the subnet mask corresponding to a /15 CIDR network prefix?
Multiple Choice Options
- A
255.240.0.0
- B
255.248.0.0
- C
255.252.0.0
- D✓ Correct Option
255.254.0.0
Detailed Technical Solution & Explanation
A /15 prefix specifies 15 contiguous network bits set to 1:
11111111 . 11111110 . 00000000 . 00000000
Converting each octet to decimal:
•
First octet:
•
Second octet:
•
Third & Fourth octets:
Yielding the subnet mask: 255.254.0.0.
Option Analysis:
•
Option A (255.240.0.0): Subnet mask for /12 prefix.
•
Option B (255.248.0.0): Subnet mask for /13 prefix.
•
Option C (255.252.0.0): Subnet mask for /14 prefix.
•
Option D (255.254.0.0): Correct. Subnet mask for /15 prefix.
Reference: Mock Test 06NEC Licensure Syllabus