RCDD Wireless Systems Design and Infrastructure

Question 1

According to ANSI/TIA-4965, what is the recommended maximum distance between wireless access point (WAP) mounting locations and the nearest telecommunications outlet in a distributed antenna or WAP deployment?

Accepted Answer

30 meters (100 ft)

Answer

ANSI/TIA-4965 recommends WAP locations be served by cabling no longer than 30 meters (100 ft) from the telecommunications outlet to ensure adequate PoE delivery and signal quality.

Question 2

Which IEEE standard defines Power over Ethernet (PoE) at a maximum of 15.4 watts of power delivered to a powered device (PD)?

Accepted Answer

IEEE 802.3af

Answer

IEEE 802.3af (PoE) delivers a maximum of 15.4 W at the PSE (12.95 W at the PD), which is the original PoE standard.

Question 3

When designing in-building wireless (IBW) systems, a Distributed Antenna System (DAS) is primarily used to:

Accepted Answer

Improve cellular and wireless coverage in areas with weak or no signal

Answer

A DAS distributes RF signals from a central source through remote antenna units to improve wireless and cellular coverage throughout a building.

Question 4

In wireless LAN design, what term describes the overlapping coverage area between two adjacent access points, typically set at 15–20% overlap, to enable seamless roaming?

Accepted Answer

Cell overlap

Answer

Cell overlap (15–20%) between adjacent WAPs ensures a client device can roam seamlessly without dropping the connection before associating with the next AP.

Question 5

Which frequency band is most susceptible to absorption by walls and physical obstructions in an indoor wireless deployment?

Accepted Answer

5 GHz

Answer

The 5 GHz band has shorter wavelengths that are more readily absorbed and attenuated by walls and obstructions compared to 2.4 GHz, reducing range indoors.

RCDD - Registered Communications Distribution Designer Practice Test

RCDD - Registered Communications Distribution Designer Practice Test

RCDD Wireless Systems Design and Infrastructure