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CWNA Take This Test 1

Terms in this set (116)

What statement about the beamwidth of an RF
antenna is true?

A. The horizontal and vertical beamwidth are measured where the
main lobe loses 6 dB of power.

B. Beamwidth has no impact on the propagation pattern.

C. Horizontal beamwidth is displayed on the Elevation chart.

D. As the gain of the antenna increases, the beamwidth decreases
in either the horizontal or vertical direction or both.

As the gain of the antenna increases, the beamwidth decreases
in either the horizontal or vertical direction or both.

What is true about WPA in 802.11 wireless
networks?

A. WPA implements AES encryption in the same way that WEP does.

B. WPA is based on CCMP/AES and is non-deprecated in the 802.11-2016 standard.

C. When WPA is used, 802.11n and 802.11ac devices fall back to 54 Mbps as the highest data rate.

D. WPA is based on TKIP/RC4 and is non-deprecated in the 802.11-2016 standard.

When WPA is used, 802.11n and 802.11ac devices fall back to 54 Mbps as the highest data rate

When an 802.11 amendment is ratified, what
happens to the standard?

You must select 1 answer

A. The amendment specifications are optional and never become part of a rollup update.

B. The standard includes the specifications of the amendment even though they are not included in a rollup update initially.

C. Device manufacturers must wait until the next rollup to include the amendment specifications in chipsets and drivers.

D. Amendments are created to resolve errors in the standard and introduce no new features.

The standard includes the specifications of the amendment even though they are not included in a rollup update initially.

You are implementing a VHT-capable AP. When
operating in VHT mode, which one of the following channels is not available for use by the AP?

You must select 1 answer

A. 153

B. 144

C. 11

D. 56

What statement is true regarding the use of the
ERP PHY in 802.11 networks?

You must select 1 answer

A. ERP operates in either 2.4 GHz or 5 GHz and supports a maximum data rate of 54 Mbps.

B. ERP is identical to OFDM PHY, except it operates in the 5 GHz band whereas OFDM operates in the 2.4 GHz band.

C. ERP uses 256-QAM modulation to achieve the maximum data rate of 54 Mbps.

D. ERP operates only in the 2.4 GHz band and supports a maximum data rate of 54 Mbps.

ERP operates only in the 2.4 GHz band and supports a maximum data rate of 54 Mbps.

Which IEEE 802.11 Physical Layer (PHY) supports
frequency use below 1 GHz and is optimal for low
data rate long range communications?

You must select 1 answer

A. VHT

B. HT

C. S1G

D. DMG

An 802.11-based network includes two laptops,
one mobile phone, and one tablet. No AP is
involved in the communications. What WLAN use
case is described?

You must select 1 answer

A. BSS

B. IBSS

C. ESS

D. WWAN

When a controller-based WLAN is in use and
roaming is desired with 802.1X/EAP, what solution
may be used to implement fast and secure
roaming?

You must select 1 answer

A. OKC

B. DFS

C. TPC

D. WMM

What can a client device use to determine whether
a BSS supports WMM QoS capabilities?

You must select 1 answer

A. Control frame analysis of existing associated STAs

B. Data frame analysis of existing associated STAs

C. QoS Query frames

D. Beacon frame information

Beacon frame information

How can a transmitting client STA determine
whether a data frame transmitted to the AP was
delivered or not?

You must select 1 answer

A. If the AP transmits any other frames, the STA can assume it received the transmitted frame.

B. If no collision was detected, the data frame was delivered.

C. If a matching Ack frame is received, the data frame was delivered.

D. Frames are always delivered on the WM, so the STA can assume delivery.

If a matching Ack frame is received, the data frame was delivered.

What metric or parameter is not likely to be used
by a client STA when selecting a BSS to which it
will connect?

You must select 1 answer

A. Retry rate

B. RSSI

C. Beacon frame signal strength

D. Supported data rates

What original authentication method of the
802.11-1997 standard is still included in the
standard and non-deprecated?

You must select 1 answer

A. CCMP

B. WEP

C. Shared Key Authentication

D. Open System Authentication

Open System Authentication

When an 800 nanosecond delay is inserted
between symbols, what is certainly in use?

You must select 1 answer

A. DIFS

B. Long guard interval

C. SIFS

D. Short guard interval

Long guard interval

What is used to synchronize the receiver for
reception of an 802.11 PPDU?

You must select 1 answer

A. Preamble

B. PLCP header

C. MAC header

D. FCS

What new feature introduced with 802.11ac was
designed to improve power management in the 5
GHz band?

You must select 1 answer

A. 8 stream MIMO

B. 256-QAM

C. VHT TXOP

D. Consistent use of A-MPDU

When an 802.11 STA received a frame not
intended for it, what field indicates the length of
time required to complete the frame transaction
after the current frame being received?

You must select 1 answer

A. Duration/ID

B. Length

C. Type

D. Retry

What kind of 802.11 device is most likely to have
multiple LAN switch ports, a WAN/Internet port,
and dual-band 802.11 radios?

You must select 1 answer

A. Enterprise AP

B. WLAN bridge

C. Home WLAN router

D. Mesh AP

Home WLAN router

What Wi-Fi Alliance certification/standard can be
used by hotspots to allow client devices to
connect automatically if the hotspot supports a
subscription service to which the client is
subscribed?

You must select 1 answer

A. Voice-Enterprise

B. WMM

C. WPA2

D. Passpoint

A temporary mobile office is being deployed. In
addition to the local WLAN, what will be required
to provide Internet access at the site among the
listed options?

You must select 1 answer

A. Ethernet switches and IP routers

B. Wireless backhaul

C. RADIUS server

D. LDAP server

Wireless backhaul

When implementing PoE, what role is played by a
wireless AP?

You must select 1 answer

A. PSE

B. PD

C. Midspan injector

D. Power splitter

You have several 802.11n AP's that require only
802.3af PoE power. What is the minimum power
that is expected to be available for the PD in this
scenario assuming proper cable lengths are
used?

You must select 1 answer

A. 30 W

B. 15.4 W

C. 25.5 W

D. 12.95 W

What high availability solution uses one controller
as a backup for several other controllers in case a
controller fails?

You must select 1 answer

A. RAID5

B. N+1

C. Striping

D. Clustering

When centralized data forwarding is used in a
controller-based architecture, what device creates
the 802.3 Ethernet frames, removing all 802.11-
specific information, and properly tags them with
QoS markings to be forwarded onto the final
destination?

You must select 1 answer

A. AP

B. Client

C. Controller

D. IP router

In an 802.11 2.4 GHz system, what 20 MHz
channels are considered non-overlapping?

You must select 1 answer

A. 1 and 5

B. 3 and 6

C. 4 and 9

D. 2 and 5

If the center frequency of channel 2 is 2417 MHz,
what is the center frequency of channel 5?

You must select 1 answer

A. 2485

B. 2412

C. 2420

D. 2432

You must enable a feature on APs that allows for
higher data rate clients to receive more time for
frame reception from the APs than lower data rate
clients. What is this feature?

You must select 1 answer

A. Load Balancing

B. Band Steering

C. AirTime Fairness

D. RTS/CTS

AirTime Fairness

You are implementing an MDM solution. For what
might this be used?

You must select 1 answer

A. High availability for controllers

B. BYOD

C. VPN endpoint

D. Automatic channel selection

The documentation from your WLAN vendor
indicates that the time clocks on all devices must
be synchronized. What service may be used on
the network to perform this action?

You must select 1 answer

A. DNS

B. NTP

C. RADIUS

D. LDAP

What statement is true about the Ethernet cables
used for AP connectivity?

You must select 1 answer

A. If you use CAT6 cabling, you can install 250 meter cable runs instead of the 100 meter limit of CAT5e.

B. PoE can operate across CAT5e cables, but CAT3 cables are sufficient for providing 802.3at PoE power.

C. The minimum required Ethernet cable type for 802.11ac APs is CAT3.

D. CAT6 Ethernet cables provide superior performance to CAT5 Ethernet cables.

CAT6 Ethernet cables provide superior performance to CAT5 Ethernet cables.

What configuration option is sometimes thought
to be a security solution for WLANs, but is easily
circumvented by attackers?

You must select 1 answer

A. CCMP

B. WPA2

C. EAP-TLS

D. SSID hiding

What protocol should be used for Web-based
administration interfaces in order to increase
security?

You must select 1 answer

A. HTTPS

B. HTML

C. HTTP

D. SNMPv3

What encryption algorithm is used by WPA2-
Enterprise in secure WLANs using no deprecated
802.11 solutions?

You must select 1 answer

A. AES

B. RC4

C. DES

D. 3DES

When using 802.1X/EAP authentication, what is
the most common authentication server used in
organizations?

You must select 1 answer

A. AD DS Domain Controller

B. TACACS

C. RADIUS

D. Controller

What solution can detect and mitigate rogue
devices discovered on the WLAN?

You must select 1 answer

A. LDAP server

B. RTLS server

C. Host-based IDS

D. WIPS

When using a protocol analyzer, what should you
look at to see the duration value for a particular
data frame in the capture?

You must select 1 answer

A. Expert views

B. Traffic flows

C. Packet decode

D. Traffic statistics

What is the most common metric given for
maximum unidirectional delay in VoIP
communications?

You must select 1 answer

A. 150 ms

B. 300 ms

C. 50 ms

D. 10 ms

Which one of the following is a kind of 802.11-
based interference caused by 802.11 devices?

You must select 1 answer

A. RFID

B. ZigBee

C. Bluetooth

D. ACI

What is an important consideration when
determining the impact of a non-Wi-Fi interferer
on the 802.11 channels nearby?

You must select 1 answer

A. Protocols used by the interferer

B. Frequencies used by the interferer

C. Coding rate used by the interferer

D. Age of the interfering device

Frequencies used by the interferer

You have implemented a real-time video
conferencing system on your WLAN. What two
factors will be most important to the quality of
communications in this system?

You must select 1 answer

A. Throughput and reliability

B. Latency and jitter

C. Authentication and encryption

D. Latency and encryption

Throughput and reliability

What is the primary difference between
throughput testing and load testing?

You must select 1 answer

A. Throughput testing is often a single machine test and load testing includes a simulated production load.

B. Throughput testing provides no value while load testing does provide value.

C. Throughput testing is not supported on WLANs, but load testing is.

D. Load testing is not supported on WLANs, but throughput testing is.

Throughput testing is often a single machine test and load testing includes a simulated production load.

When using wireless design software for post-implementation validation, what is performed that
is not performed in predictive modeling design scenarios?

You must select 1 answer

A. Capture of signals within the physical space

B. Calibration or scaling of the floor plan

C. Drawing walls and other materials

D. Indicating AP locations

Capture of signals within the physical space

After performing corrective actions, according to
the CWNP troubleshooting methodology, what
action should be taken next?

You must select 1 answer

A. Verify the solution

B. Document the results

C. Discover the scale of the problem

D. Define possible causes

Verify the solution

What is the first step in the CWNP troubleshooting
methodology?

You must select 1 answer

A. Document the results

B. Verify the solution

C. Identify the problem

D. Define possible causes

Identify the problem

You are troubleshooting a performance problem
experienced by several STA's in an area
approximately five square meters in size. You
want to see if a non-Wi-Fi interferer is in the
space. What tool should you use?

You must select 1 answer

A. WLAN scanner

B. WLAN protocol analyzer

C. Spectrum analyzer

D. Throughput tester

Spectrum analyzer

What is an advantage of a centralized WLAN
monitoring solution that is not available in most
laptop-based protocol analyzers?

You must select 1 answer

A. Frame capture and decoding

B. Expert views

C. Data aggregation from multiple real-time sources for automated reporting and analysis

D. Traffic statistics for the BSA

Data aggregation from multiple real-time sources for automated reporting and analysis

What will decrease in an environment when the
noise floor increases?

You must select 1 answer

A. Signal strength

B. SNR

C. Transmit power

D. Antenna gain

What is a common solution to hidden node
problems in WLANs?

You must select 1 answer

A. Reducing the client output power

B. Enabling RTS/CTS

C. Reducing the client antenna gain

D. Increasing the AP fragmentation threshold

Enabling RTS/CTS

You have determined that an AP is not getting
sufficient PoE power because it will not power up.
You have verified that the CAT6 cable is only 30
meters in length and is connected to a switch port
with PoE enabled. What should you check next?

You must select 1 answer

A. Verify that the CAT6 cable is blue and not yellow

B. Verify that the midspan injector is powered on

C. Verify that the power budget in the switch as sufficient remaining power for the AP

D. Verify that the AP has the "use PoE" hardware switch set to "on"

Verify that the power budget in the switch as sufficient remaining power for the AP

You are troubleshooting a problem with a USB
adapter on a laptop. When you insert the adapter,
after having installed the drivers, it is not detected
by the operating system and no wireless networks
are shown. The adapter has been tested on
another machine where it works properly. What is
a practical next action to take in this scenario?

You must select 1 answer

A. Reinstall the operating system on the problem laptop

B. Delete the driver from the problem laptop and use the adapter without a driver

C. Install a third-party supplicant to use the adapter in the problem laptop

D. Check the driver version in use on the working computer and ensure the same driver version is used on the problem laptop

Check the driver version in use on the working computer and ensure the same driver version is used on the problem laptop

An RF wave is weaker after traveling through
some material in its path, what is the term used to
describe what happened as the RF wave passed
through the material?

You must select 1 answer

A. Reflection

B. Refraction

C. Scattering

D. Absorption

What occurs naturally as an RF wave travels
through space between antennas?

You must select 1 answer

A. VSWR

B. FSPL

C. Amplification

D. Phase altering

What is a relative unit of measurement that allows
comparison of the amplitude between two
signals?

You must select 1 answer

A. dB

B. RSSI

C. dBm

D. mW

An AP transmits with an output power level of 25
mW and uses a 3 dBi antenna. What is the EIRP?

You must select 1 answer

A. 3 dBm

B. 5 dBm

C. 10 dBm

D. 17 dBm

When an RF link in a bridging implementation
spans more than 7 miles, what must be
considered that need not typically be considered
otherwise?

You must select 1 answer

A. Earth bulge

B. FSPL

C. SNR

D. Output power

What phrase defines an Intentional Radiator?

You must select 1 answer

A. The power output from the radio into the RF cable

B. The power output from the antenna

C. The power provided to the antenna including radio output power and all cable and connector losses

D. The power received by the receiving antenna

The power provided to the antenna including radio output power and all cable and connector losses

What multi-antenna technology used at the
transmitter to improve the signal received at the
receiver was first introduced in 802.11n and
standardized on a single option in 802.11ac?

You must select 1 answer

A. Transmit beamforming

B. MRC

C. STBC

D. Diversity

Transmit beamforming

What new transmission technology was
introduced in 802.11ac that allows for an AP to
transmit to more than one client STA
concurrently?

You must select 1 answer

A. TxBF

B. MIMO

C. MU-MIMO

D. MRC

When installing an omni-directional SISO antenna
for outdoor coverage, what kind of mount is
commonly used that includes u-brackets?

You must select 1 answer

A. Ceiling mount

B. Pole/mast mount

C. Wall mount

D. Desktop mount

Pole/mast mount

What organization certifies equipment to
inter-operate with other 802.11-based equipment?

You must select 1 answer

A. IEEE

B. IETF

C. FCC

D. Wi-Fi Alliance

When a new PHY is to be created for the 802.11
standard, what is formed first?

You must select 1 answer

A. Draft

B. Working group

C. Ratified amendment

D. Proposals

What PHY operates in 2.4 GHz and is capable of a
maximum of 11 Mbps?

You must select 1 answer

A. HT

B. ERP

C. HR/DSSS

D. DSSS

In addition to modulation, guard interval, channel
width, and the number of spatial streams, what
impacts the data rate according to the 802.11-2016
MCS tables?

You must select 1 answer

A. RSSI

B. Signal strength

C. Coding

D. Noise floor

What 2.4 GHz channels are available worldwide in
all regulatory domains?

You must select 1 answer

A. 1 through 14

B. 1 through 13

C. 1 through 12

D. 1 through 11

When multiple AP's are used with a shared
distribution system, such as Ethernet, what kind
of WLAN service set is in use?

You must select 1 answer

A. ESS

B. IBSS

C. Ad-hoc

D. Mesh BSS

What is typically mapped to the MAC address of
the AP when only a single BSS is implemented by
the AP?

You must select 1 answer

A. SSID

B. BSSID

C. ESSID

D. DSM

What kind of roaming may take place and include
Layer 1 roaming?

You must select 1 answer

A. Band roaming from 2.4 GHz to 5 GHz

B. Roaming from Wi-Fi to Ethernet

C. Roaming from Wi-Fi to Token Ring

D. No roaming involves Layer 1

Band roaming from 2.4 GHz to 5 GHz

When is an authentication response frame used?

You must select 1 answer

A. When an authentication request frame has been received

B. When a client accidentally disconnects from the AP

C. The 802.11 standard only specifies an authentication
frame and not request and response frames for authentication

D. When a probe request frame is received

The 802.11 standard only specifies an authentication
frame and not request and response frames for authentication

What is required before a Block
Acknowledgement can be used?

You must select 1 answer

A. 802.11g must be the active PHY

B. 802.11i must be implemented in the BSS

C. A sounding exchange must take place

D. A block acknowledgement request exchange must take place

A block acknowledgement request exchange must take place

A client STA is sending Probe Request frames on
several channels. What kind of WLAN scanning is
in use?

You must select 1 answer

A. Active scanning

B. Passive scanning

C. Port scanning

D. Channel pruning

Active scanning

What is the basic process of Open System
authentication?

You must select 1 answer

A. Authentication request, ID request, ID response, Authentication response, Association request, and Association response

B. Authentication request, Authentication response, Association request, and Association response

C. Authentication request, Association response

D. Authentication request, Probe response, Association request, Probe response

Authentication request, Authentication response, Association request, and Association response

What defines data rates for HT and VHT devices?

You must select 1 answer

A. They are fixed at 150, 180 and 240 Mbps

B. They are fixed at 1, 2, 5.5 and 11 Mbps

C. MCS tables

D. PHY parameter tables

What is in HT and VHT PHY preambles that allows
for the synchronization of the receiving radio?

You must select 1 answer

A. Length field

B. Data rate specification

C. Duration field

D. Training fields

Training fields

What inter-frame space is used before an Ack
frame?

You must select 1 answer

A. DIFS

B. SIFS

C. AIFS

D. EIFS

What is used to determine the number of slot
times used in the formula to calculate an AIFS
duration when EDCA is used?

You must select 1 answer

A. Data rate

B. Frame duration

C. AIFS number (AIFSN)

D. The AIFS duration is fixed for each PHY

AIFS number (AIFSN)

What kind of WLAN management solution does
not include centralized 802.11 MAC processing of
any kind, but does include centralized
configuration of the AP's without the use of the
Internet?

You must select 1 answer

A. Cloud-based

B. Controller-based

C. WNMS-based

D. Virtual controller-based

A push-to-talk device has similar requirements
most alike to what other common WLAN client
device?

You must select 1 answer

A. Laptop with standard data applications

B. VoIP handset

C. Handheld scanners

D. 802.11 video cameras

When implementing a WLAN for corporate data
access, you are planning for WPA2
implementation. What issue related to planning
corporate data access are you considering?

You must select 1 answer

A. Ensure sufficient coverage

B. Ensure sufficient throughput

C. Ensure sufficient security

D. Ensure availability

Ensure sufficient security

When implementing a WLAN bridge link you must
ensure 60% clearance of what defined zone?

You must select 1 answer

A. BSA zone

B. Fresnel zone

C. Antenna height zone

D. PoE zone

You are deploying an RTLS solution. What is an
important requirement of most RTLS
implementations?

You must select 1 answer

A. Sensors placed around the facility perimeter

B. Use of at least one sensor for every STA

C. Use of at least two sensors for every AP

D. Implementation of VPN connectivity from the sensors to the monitoring server

Sensors placed around the facility perimeter

You have implemented a feature on the AP's that
temporarily ignores 2.4 GHz probe requests in
order to direct more client STA's to 5 GHz
channels. What is this feature?

You must select 1 answer

A. AirTime Fairness

B. RRM

C. Passpoint

D. Band Steering

What can you do to help mitigate DHCP pool
depletion issues without requiring user
configuration actions?

You must select 1 answer

A. Implement shorter lease duration's

B. Implement longer lease duration's

C. Implement smaller scopes

D. Use DHCP for wired clients only and ask guests to manually configure IP settings

Implement shorter lease duration's

In addition to mapping IP addresses to host
names for client devices, what may DNS be used
for in a controller-based environment?

You must select 1 answer

A. Location of controllers by AP's

B. Configuring IP settings in client devices

C. Synchronizing time clocks

D. Encrypting Internet communications

Location of controllers by AP's

When implementing SSIDs in APs, to what are
they typically mapped for better control of access
to resources on the LAN?

You must select 1 answer

A. IP addresses

B. MAC addresses

C. VLANs

D. User profiles

What may force an organization to implement a
PKI for practical application in a WLAN?

You must select 1 answer

A. The use of EAP-TLS

B. The use of PEAP

C. The use of WPA2-Personal

D. The use of frame aggregation

The use of EAP-TLS

What feature of WLAN APs may provide for
automatic negotiation of AP channel and power
settings among the APs or within the controllers?

You must select 1 answer

A. Band Steering

B. AirTime Fairness

C. Load balancing

D. RRM

What common feature of MDM solutions can be
used to prevent users from causing data leaks by
taking photos of sensitive documents?

You must select 1 answer

A. Self-registration

B. On-boarding

C. Feature management

D. Over-the-air registration

Feature management

Why is it unlikely that an 802.11ac wave 2 AP with
four spatial streams will exceed the capacity of a
1 Gbps Ethernet link?

You must select 1 answer

A. Because users just don't use Wi-Fi that much

B. Because the AP will compress data sent onto the wired network

C. Because 802.11 network operations consume significant air time and clients connect at varying data rates resulting in much lower useful data throughput than the maximum data rate of 802.11ac 4 stream AP's

D. Because the 1 Gbps Ethernet link can actually transmit 2 Gbps of data when the down-link and up-link wire pairs are both used for up-link transmission

Because 802.11 network operations consume significant air time and clients connect at varying data rates resulting in much lower useful data throughput than the maximum data rate of 802.11ac 4 stream AP's

What feature of AP's is often thought to be a
security solution, but provides no real security
because of simple spoofing methods?

You must select 1 answer

A. SSID hiding

B. Shared Key Authentication

C. MAC filtering

D. WEP

What organization defines the EAP protocol used
in enterprise WLAN security?

You must select 1 answer

A. IETF

B. IEEE

C. FCC

D. Wi-Fi Alliance

What is a primary benefit of EAP-TLS, EAP-TTLS,
and PEAP that is not available in WEP and Shared
Key Authentication?

You must select 1 answer

A. Encryption

B. Authentication

C. Dynamic encryption keys

D. No certificate requirements

Dynamic encryption keys

What encryption solution is provided in the 802.11
standard and is not deprecated?

You must select 1 answer

A. AES

B. RC4

C. RC5

D. SHA1

What is needed, in addition to the RADIUS server
IP address and ports, to configure an AP to use a
given RADIUS server?

You must select 1 answer

A. Shared secret

B. RADIUS server MAC address

C. RADIUS server host name

D. VPN type used to connect to the RADIUS server

You wish to administer an AP over the wired
network using the CLI. What protocol should you
use to prevent eavesdropping on the
administrative tasks?

You must select 1 answer

A. Telnet

B. HTTP

C. SSH2

D. SNMPv3

A manager has asked you to place the AP's above
the ceiling in a WLAN deployment. He has
requested this for aesthetic reasons. You know
this is not the best decision, what do you tell the
manager in an attempt to influence him to make a
better decisions?

You must select 1 answer

A. It is impossible to power AP's placed above the ceiling.

B. It is always against regulations to place AP's above the ceiling.

C. Placing the AP's above the cealing will prevent any possible configuration that would allow for client access.

D. Placing the AP's above the ceiling will alter the requirements for the WLAN and may require more AP's than would be otherwise

Placing the AP's above the ceiling will alter the requirements for the WLAN and may require more AP's than would be otherwise

You are using an 802.11 VoIP handset and
walking around the facility from end-to-end while
on a call. What might you be testing in a newly
deployed WLAN?

You must select 1 answer

A. Roaming capabilities

B. Security capabilities

C. Audio noise from RF energy

D. Battery life of the VoIP handset

Roaming capabilities

You are attempting to locate the cause of a
performance problem in two WLAN cells in a
mostly overlapping coverage area. You note that
one AP is on channel 1 and the other is on
channel 1 as well. When you document your
findings, what term do you use to describe the
problem in this configuration?

You must select 1 answer

A. CCI

B. Non-Wi-Fi interference

C. ACI

D. ZigBee interference

In addition to capacity analysis results, what
should be included in a site survey report to
ensure WLAN users are provided with
connectivity?

You must select 1 answer

A. Application Layer protocol availability analysis results

B. Layer 4 protocol availability analysis results

C. Coverage analysis results

D. WAN interface analysis results

Coverage analysis results

An organization is planning to implement a new
WLAN. They will install 20 AP's and place them all
on the same IP subnet so no IP roaming will be
required for WLAN clients. The DHCP server will
use the subnet of 192.168.10.0/24. They expect an
average of 18 client STAs per AP. What is your
immediate concern with this plan?

You must select 1 answer

A. AP's cannot handle more than 15 STAs per AP

B. The DHCP pool is not large enough

C. IP roaming occurs even when all AP's are on the same IP subnet

D. WLANs must use the 10.x.x.x networks

The DHCP pool is not large enough

When is a three dimensional RF channel plan
always required?

You must select 1 answer

A. When the WLAN is near an airport or military base

B. When the WLAN exists in an industrial environment

C. When a multi-floor WLAN is implemented

D. When the Fresnel zone is 80% blocked

When a multi-floor WLAN is implemented

What step comes after "Define the possible
causes" when considering the CWNP
troubleshooting methodology?

You must select 1 answer

A. Create a plan of action and implement it

B. Narrow to the most likely cause

C. Escalate the problem to the wireless vendor support staff

D. Document the results and close the case

Narrow to the most likely cause

You are passing random UDP data across the
WLAN and measuring results with iPerf. What
kind of test is most likely being performed?

You must select 1 answer

A. Interference location

B. Signal strength monitoring

C. Throughput test

D. Black box testing

Throughput test

Which one of these is not a good use of a
spectrum analyzer?

You must select 1 answer

A. Locating sources of RF interference

B. Determining retry rates on the WLAN

C. Evaluating RF air time utilization in a channel

D. Viewing historical RF activity in a channel

Determining retry rates on the WLAN

In what band do many USB 3 devices cause
significant localized (within 3-5 meters) RF
interference?

You must select 1 answer

A. 60 Ghz

B. Sub-1 GHz

C. 5 GHz

D. 2.4 GHz

You are reporting on the RF environment in your
facility. The manager asks you do describe the
SNR noted in the report. Which of the following is
the best explanation?

You must select 1 answer

A. SNR is the difference between the SOM and the Fade Margin

B. SNR is the difference between the noise in the environment and the RF signal strength

C. SNR is the simple noise reduction algorithm used on filters on 802.11 adapters

D. SNR is the interference caused by USB 3.0 devices

SNR is the difference between the noise in the environment and the RF signal strength

What common building component is likely to
cause coverage holes in a WLAN deployment if
not considered and resolved in the WLAN design?

You must select 1 answer

A. Windows

B. Cubicle partitions

C. Elevators

D. Tile floors

An AP that uses PoE powers up, but upon
inspection you notice that only one radio (the 2.4
GHz radio) is active. You verify that the
configuration has both the 2.4 GHz and 5 GHz
radios enabled. When you connect the AP to wall
power, both radios work as expected. What is a
likely cause of this problem?

You must select 1 answer

A. The AP firmware is faulty

B. The external antennas for the 5 GHz radio are not connected

C. Insufficient PoE power

D. WPA is enabled on the 5 Ghz radio, causing it to be disabled

Insufficient PoE power

You administer a WLAN that offers a guest SSID
of CORPCUEST. Users connect to the
CORPGUEST SSID, but report that they cannot
access Internet web sites. The devices indicate no
Internet connection. What common problem
causes this scenario?

You must select 1 answer

A. NTP issues

B. DNS failure

C. Hardware issues

D. IP routing issues

What is defined as a system used to interconnect a set of BSSs and integrated LANs to create an ESS?

A. WM

B. DFS

C. DS

D. STA

When an RF wave encounters obstacles smaller than the wavelength and reflective in nature, what is likely to occur?

A. Warping

B. Reflection

C. Refraction

D. Scattering

What is the term used when measuring return loss caused by mismatched impedance in RF cables and connectors?

A. VSWR

B. EIRP

C. IR

D. Attenuation Factor

What metric ultimately determines the data rate that can be achieved between an AP and an STA?

A. SNR

B. Signal Strength

C. Noise Floor

D. Beacon Rate

What is the output of a link budget?

A. System Cost (SC)

B. Signal-to-Noise-Ratio (SNR)

C. Total Cost of Ownership (TCO)

D. System Operating Margin (SOM)

System Operating Margin (SOM)

A WLAN transmitter that emits a 20 mW signal is connected to a cable with 6 dB loss. If the cable is connected to an antenna with 12 dBi gain, what is the EIRP at the antenna element?

A. 120 mW

B. 80 mW

C. 5 mW

D. 320 mW

Why are some WLAN client devices able to receive signals at given data rates that are weaker than other client devices can receive?

A. The device drivers are coded according to better programming practices.

B. The receive sensitivity is better on some devices than others.

C. The output power is higher on some devices than others.

D. The VSWR is higher on devices that can receive weaker signals.

The receive sensitivity is better on some devices than others.

What term describes an RF transmission system up to but not including the antenna?

A. Chipset

B. Radio

C. EIRP

D. Intentional Radiator

Intentional Radiator

What kind of MIMO antennas are typically used for WLAN deployments when the antennas are placed central to the target coverage area?

A. Patch

B. Grid

C. Omni-directional

D. Panel

Omni-directional

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