CWDP CWDP Outdoor and Mesh Networking 2

Question 1

What is the purpose of Dynamic Frequency Selection (DFS) in 5 GHz outdoor WLAN deployments?

Accepted Answer

To detect radar signals and vacate channels to prevent interference with safety systems

Answer

To automatically select the least-congested channel for maximum throughput

Answer

To dynamically adjust transmit power based on client distance

Answer

To enable channel bonding for higher bandwidth

Question 2

A designer is planning a campus outdoor WLAN using 802.11ac APs. Which channel width provides the best balance of throughput and interference avoidance in an outdoor environment?

Accepted Answer

40 MHz channels

Answer

160 MHz channels

Answer

80 MHz channels

Answer

20 MHz channels

Question 3

What factor most significantly increases free-space path loss between two outdoor wireless nodes?

Accepted Answer

Doubling the operating frequency or distance

Answer

Antenna polarization mismatch

Answer

Cable losses in the transmission line

Answer

Ambient temperature above 90°F

Question 4

When designing an outdoor mesh for a smart city deployment, which protocol is used by mesh nodes to discover routes and forward traffic efficiently?

Accepted Answer

Hybrid Wireless Mesh Protocol (HWMP) defined in IEEE 802.11s

Answer

STP (Spanning Tree Protocol)

Answer

OSPF over wireless links

Answer

ARP flooding between mesh nodes

Question 5

What is the recommended minimum link margin (fade margin) for a reliable outdoor point-to-point WLAN bridge link?

Accepted Answer

15–20 dB

Answer

2–5 dB

Answer

5–10 dB

Answer

30–40 dB

Question 6

Which environmental factor causes the most significant signal attenuation for outdoor 5 GHz links during adverse weather?

Accepted Answer

Wind causing antenna misalignment

Answer

Direct sunlight on antennas

Answer

Heavy rain causing rain fade above 10 GHz

Answer

High humidity at ground level