200-901 Network Fundamentals Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✓

  Less interference and more channels

  Why this is correct

  The 5 GHz band offers more non-overlapping channels and avoids congestion from microwave ovens, Bluetooth, and cordless phones that crowd 2.4 GHz. This directly maximises performance and minimises interference as the scenario requires, though at the cost of shorter range.

• ✗

  Better range through walls

  Why it's wrong here

  5 GHz signals penetrate walls poorly, so range through obstacles is reduced. It is tempting because 5 GHz delivers higher throughput and less interference; better wall penetration belongs to 2.4 GHz, which the stem contrasts against.

• ✗

  Larger coverage area

  Why it's wrong here

  Larger coverage area describes 2.4 GHz, not 5 GHz: lower frequencies attenuate less through walls and obstacles, so 2.4 GHz reaches further. The 5 GHz band's shorter wavelengths limit range but deliver higher throughput and far more non-overlapping channels, which is what reduces interference. Choosing 5 GHz for coverage would be backwards.

• ✗

  Higher compatibility with older devices

  Why it's wrong here

  Older devices often support only 2.4 GHz, so 5 GHz reduces compatibility. It is tempting because 5 GHz is newer and faster; backward compatibility is a 2.4 GHz strength, the opposite of the advantage sought here.