Nokia Certified Network Professional – IP/MPLS Services — Question 9

In which window(s) does the attenuation reach its minimum peak?

Answer options

• A. First window (850 nm)
• B. Second window (1300 nm)
• C. Third window (1550 nm)
• D. Both first and second windows

Correct answer: C

Explanation

The correct answer is C, as the third window at 1550 nm is known for having the least signal attenuation, making it ideal for long-distance fiber optic communications. The first and second windows have higher attenuation levels, so they are not optimal compared to the third window.