CompTIA Network+ Question C-87

Which of the following communication technologies would MOST likely be used to increase bandwidth over an existing fiber optic network by combining multiple signals at different wavelengths?

A. DWDM
B. SONET
C. ADSL
D. LACP

Correct Answer: A

Explanation:
Dense wavelength-division multiplexing (DWDM) is a high-speed optical network type commonly used in MANs (metropolitan area networks). DWDM uses as many as 32 light wavelengths on a single fiber, where each wavelength can support as many as 160 simultaneous transmissions using more than eight active wavelengths per fiber.

CompTIA Network+ Question B-83

Exploiting a weakness in a user’s wireless headset to compromise the mobile device is known as which of the following?

A. Multiplexing
B. Zero-day attack
C. Smurfing
D. Bluejacking

Correct Answer: D