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CWNP CWDP-304 - Certified Wireless Design Professional

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Total 281 questions

When performing an indoor predictive site survey to make the WLAN planning and design cycle more efficient, what is a best practice for configuration of the simulated APs in the predictive modeling software?

Response:

A.

Always use the default 2.2 dBi omnidirectional antenna patterns for simulated APs.

B.

If dynamic RRM will be used, AP transmit power should be set to an estimated average level of the expected client devices, such as 25 mW.

C.

All simulated APs should be set to 20 MHz channels only.

D.

Defining custom AP and antenna patterns will yield more accurate prediction data than the pre-configured vendor AP/antenna combinations.

Given:

In your regulatory domain, a Tx Power Level of "1" is equivalent to 17 dBm.

For every integer increment (e.g. from 1 to 2) to the Tx Power Level, the APs transmit power is halved.

In units of mW, what is the actual transmit power for an AP configured at a Tx Power Level of "4"?

A.

6.25 mW

B.

50 mW

C.

12.5 mW

D.

8 mW

One of your customers plans on providing wireless coverage to a warehouse facility. After performing an initial walkthrough, you collect the

following information:

The central part of the warehouse is between 400 and 600 feet (122 to 183 meters) from the warehouse switches mounted on the walls.

✑ The warehouse storage is composed of metallic racks with varying inventory levels and contents, from electronics and plastic toys to food

pallets and juice bottles.

✑ Workers need basic data coverage from their working location, and are not highly mobile. They usually work from one single aisle, and their

laptop is on a cart with wheels.

What would be your one recommendation to provide coverage to the central area of the warehouse?

A.

Equip workers laptops with a directional antenna and install APs less than 328 feet (100m) away from the switch.

B.

In this case, extend the cable length just beyond 328 feet (100 m) and position APs as close as possible to the central area of the

warehouse.

C.

Position APs along the walls, and equip the APs with Yagi antennas to cover the central area.

D.

Install APs for client access in the central area and use a mesh backhaul link to connect to the DS.

Assume that your network operates in a regulatory domain that allows use of the entire 5 GHz space allowed in the 802.11ac amendment. In your

upcoming

802.11ac deployment, you would like to take advantage of the performance improvements that result from channel bonding. However, after

extensive testing, you have determined that your mission-critical WLAN should not use channels requiring DFS support.

Given those two criteria (enable channel bonding and disable DFS channels), in the 5 GHz spectrum, how many non-overlapping 40 MHz channels

will your system be able to use?

A.

2

B.

3

C.

4

D.

6

What two 802.11 amendments deal with regulatory and transmission requirements?

Response:

A.

802.11k

B.

802.11i

C.

802.11d

D.

802.11f

E.

802.11h

Name the audience type not addressed in this chapter for HLDs.

Response:

A.

Operations

B.

Executives

C.

Designers

D.

Engineering

What statement is true of a WLAN design that supports Real-Time Location Services (RTLS) with 802.11 RFID asset tags?

A.

When passive tags are implemented, the AP density should be increased by 25% to make up for the shorter transmit range of passive tags

as compared to active tags.

B.

Active RFID tags periodically transmit 802.11 beacon management frames that must be synchronized with the AP for proper location of the

tagged asset.

C.

With passive tags, AP transmit gain should be increased to supply extra power for near-field coupling or backscatter modulation from the

tag to the AP since the passive tag lacks an internal power source.

D.

Passive tags do not communicate directly with the WLAN infrastructure, but instead they rely on the tag reader to communicate tag

information to the

During a post-deployment verification, you are requested to troubleshoot an area where users are experiencing poor throughput. They are using

data communication only, mainly from laptops. You captured the frame showing an incorrect FCS. This frame is typical of those that were

captured by the analyzer.

What does this frame reveal about the RF network in this area?

A.

One station seems to be streaming video, thus may have reserved significant bandwidth via admission control

B.

Contention Free is in place in this network, which may starve some non-QoS stations from access

C.

Multipath or excessive collisions seem to be an issue in this area

D.

The AP seems to be too far to provide enough coverage to this area

When doing some frame capturing over the air during a voice call, you realized that frames on the downlink (from the AP to the client) direction are

not being transmitted with the correct UP value for voice frames, but on the uplink (from the client to the AP) direction are being transmitted

correctly. What's the cause of this issue?

A.

Bad client driver

B.

AP is not receiving enough PoE, thus not using QoS features

C.

Somewhere on the wired network QoS markings aren't being trusted

D.

Faulty antenna on the AP

Which of the following is not a business requirement?

Response:

A.

The new network design must improve employee productivity.

B.

The new network design must cut operating expenses.

C.

The new network design must make employees happy to come to work.

D.

The new network design must provide support for 802.11n.