CWDP Outdoor and Mesh Networking Flashcards
6 cards from real CWDP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CWDP Outdoor and Mesh Networking flashcards as text
What is the purpose of Dynamic Frequency Selection (DFS) in 5 GHz outdoor WLAN deployments?
Answer: To detect radar signals and vacate channels to prevent interference with safety systems
DFS monitors for radar transmissions and moves WLAN equipment off channels to prevent interference with radar systems.
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?
Answer: 40 MHz channels
40 MHz channels in 5 GHz outdoor deployments balance throughput with sufficient spectrum availability and reduced co-channel interference risk.
What factor most significantly increases free-space path loss between two outdoor wireless nodes?
Answer: Doubling the operating frequency or distance
Free-space path loss increases by 6 dB when distance or frequency doubles, as defined by the Friis transmission equation.
When designing an outdoor mesh for a smart city deployment, which protocol is used by mesh nodes to discover routes and forward traffic efficiently?
Answer: Hybrid Wireless Mesh Protocol (HWMP) defined in IEEE 802.11s
IEEE 802.11s defines HWMP as the default path selection protocol for Wi-Fi mesh networks.
What is the recommended minimum link margin (fade margin) for a reliable outdoor point-to-point WLAN bridge link?
Answer: 15–20 dB
A fade margin of 15–20 dB accounts for atmospheric fading, rain fade, and multipath variations to ensure reliable link availability.
Which environmental factor causes the most significant signal attenuation for outdoor 5 GHz links during adverse weather?
Answer: Wind causing antenna misalignment
Wind-induced antenna sway causes misalignment of high-gain directional antennas, significantly degrading narrow-beam outdoor links.
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