CWDP CWDP Outdoor and Mesh Networking 3

Question 1

A CWDP is designing a wireless bridge connecting two buildings 800 meters apart. Which antenna type is most appropriate for each end?

Accepted Answer

High-gain directional antennas (Yagi or parabolic dish) at both ends

Answer

High-gain directional antennas concentrate power along the point-to-point path, providing sufficient link budget over 800 meters.

Question 2

What is the primary difference between a wireless bridge and a wireless mesh node?

Accepted Answer

A bridge connects two fixed points; a mesh node dynamically routes through multiple paths

Answer

Wireless bridges create fixed point-to-point or point-to-multipoint links, while mesh nodes dynamically discover and route through multiple paths.

Question 3

In outdoor WLAN design, what is the purpose of calculating the link budget?

Accepted Answer

Verify that received signal strength will exceed the receiver's sensitivity threshold with adequate margin

Answer

Link budget analysis ensures that transmit power, gains, losses, and path loss result in adequate received signal at the far end.

Question 4

Which WLAN standard introduced improvements specifically beneficial for outdoor mesh networks, including better multi-hop support?

Accepted Answer

IEEE 802.11s

Answer

IEEE 802.11s is the mesh networking amendment that defines peer discovery, security, and path selection for multi-hop Wi-Fi mesh.

Question 5

A CWDP is designing a parking lot WLAN using outdoor APs. What IP67 rating indicates about the AP enclosure?

Accepted Answer

The enclosure is dust-tight and protected against immersion up to 1 meter for 30 minutes

Answer

IP67 means the enclosure is fully dust-tight (6) and can withstand water immersion up to 1 meter for 30 minutes (7).

Certified Wireless Design Professional (CWDP) Practice Test