RWF_100__RUCKUS_Wi_Fi_Fundamentals__RWF__Self_Assessment pdf

Prévia do material em texto

/
Home ► Partner Training ► Partner Program Training and Exams ► Technical Certifications and Accreditations ► RWF-100:
RUCKUS Wi-Fi Fundamentals (RWF) Self-Assessment ► RUCKUS Wi-Fi Fundamentals (RWF) Self-Assessment ► RWF 100-
RUCKUS Wi-Fi Fundamentals (RWF) Self-Assessment
Question 1
Correct
1.00 points out of
1.00
Started on Saturday, August 8, 2020, 3:40 PM
State Finished
Completed on Saturday, August 8, 2020, 3:46 PM
Time taken 5 mins 53 secs
Points 17.00/20.00
Grade 85.00 out of 100.00
Feedback Congratulations! You've passed the self-assessment.
You may still want to review some of the course content based on questions you
answered incorrectly and the feedback provided.
When comparing absolute power measurements, what value in dBm is referenced
against 1 mW?
Select one:
A. -1 dBm
B. 0 dBm 
C. 1 dBm
D. 10 dBm
0 dBm is the reference point for 1 mW.
The correct answer is: 0 dBm
Check
https://training.ruckuswireless.com/
https://training.ruckuswireless.com/course/index.php?categoryid=23
https://training.ruckuswireless.com/course/index.php?categoryid=114
https://training.ruckuswireless.com/course/index.php?categoryid=30
https://training.ruckuswireless.com/course/view.php?id=1456
/
Question 2
Correct
1.00 points out of
1.00
Question 3
Correct
1.00 points out of
1.00
What is the purpose of the back-off timer in Wi-Fi? 
Select one:
A. flow control
B. collision avoidance 
C. decrease authentication time
D. allow backwards compatibility
The back-off timer is used to help avoid collisions and it’s duration is based upon the
contention window and PHY in use.
The correct answer is: collision avoidance
Why would a 2.4 GHz signal be better than a 5 GHz signal for an outdoor wireless
bridge?
Select one:
A. 5 GHz is for indoor use only.
B. 2.4 GHz has a longer wavelength. 
C. 2.4 GHz has a shorter wavelength.
D. 5 GHz is less susceptible to interference.
Lower frequencies have longer wavelengths than higher frequencies. Therefore, a
higher frequency signal attenuates faster than a lower frequency signal. Lower
frequency signals are also able to penetrate obstacles better than higher frequency
signals for the same reason.
The correct answer is: 2.4 GHz has a longer wavelength.
Check
Check
/
Question 4
Correct
1.00 points out of
1.00
Question 5
Correct
1.00 points out of
1.00
In addition to converting RF waves into electrical current and converting electrical
current into RF waves, what does an antenna do in RF signaling?
Select one:
A. decrypts the data
B. adds the QoS tags
C. shapes the coverage 
D. segments traffic into VLANs
Antennas shape the coverage of RF signals.
The correct answer is: shapes the coverage
Why is it important to select the country code that matches the physical location of
access points when designing and deploying a wireless network?
Select one:
A. The country code determines the language used in the management
interface of the access points and clients.
B. Different countries or regions have their own set of legal channels to use
as well as legal transmit power levels. 
C. The country code determines the protocols used when access points
and client devices communicate wirelessly.
D. Different countries or regions have their own set of data rates and
contention methods which are legal to use there.
Regulatory Bodies, countries and regions, determine which frequencies, power levels
and connector types are permitted within their boundaries.
The correct answer is: Different countries or regions have their own set of legal
channels to use as well as legal transmit power levels.
Check
Check
/
Question 6
Correct
1.00 points out of
1.00
Question 7
Correct
1.00 points out of
1.00
Which networking plane is used for configuration and monitoring?
Select one:
A. Control plane
B. Controller
C. Data plane
D. Management plane 
The Management plane is used for configuration and monitoring.
The correct answer is: Management plane
Which organization defines unlicensed frequencies used in Wi-Fi?
Select one:
A. The Wi-Fi Alliance
B. The IETF Task Groups
C. The Regulatory Domains 
D. The IEEE Standards Committee
Regulatory Domains -- governmental bodies -- allocate frequency ranges for
unlicensed use within their country or region.
The correct answer is: The Regulatory Domains
Check
Check
/
Question 8
Correct
1.00 points out of
1.00
Question 9
Incorrect
0.00 points out of
1.00
Which portion of a wireless frame is protected when encryption is used?
Select one:
A. the entire frame
B. the header
C. the payload 
D. the trailer
The payload is the only part of the frame that is encrypted when encryption is used.
The correct answer is: the payload
Why did legacy APs implement SISO diversity?
Select one:
A. To mitigate multipath
B. To increase data rates 
C. To increase transmission range
D. To serve both 2.4 GHz and 5 GHz
Single Input Single Output (SISO) Diversity is used to mitigate multipath in legacy
systems. 
The correct answer is: To mitigate multipath
Check
Check
/
Question 10
Correct
1.00 points out of
1.00
Question 11
Correct
1.00 points out of
1.00
How is passive gain accomplished in Wi-Fi communications?
Select one:
A. By changing the frequency used
B. By increasing the transmit power
C. By moving the devices closer to each other
D. By using an antenna to focus the RF signal 
Passive gain is accomplished by focusing the RF signal using an antenna. Antennas
are passive amplifiers that do not require an external power source. Instead, Antennas
focus the signal more powerfully in one direction than another.
The correct answer is: By using an antenna to focus the RF signal
Which is an additional signal strength used above the required link budget to account
for expected, but unpredictable, signal fading due to environmental conditions?
Select one:
A. Fade margin 
B. Link aggregation
C. Resultant gain
D. Spread margin
The fade margin is an additional signal strength used above the required link budget to
account for expected but unpredictable signal fading due to environmental conditions.
The correct answer is: Fade margin
Check
Check
/
Question 12
Incorrect
0.00 points out of
1.00
Question 13
Correct
1.00 points out of
1.00
What is the primary cause of WLAN problems?
Select one:
A. client device drivers
B. interference 
C. poor design
D. user errors
The primary cause of WLAN problems is poor design.
The correct answer is: poor design
A group of switches support PoE on every port. They power phones, cameras and
other PoE clients as well as APs. Some of the APs are not able to achieve the same
high data rates that others of the same model and configuration are achieving. 
What is causing this problem?
Select one:
A. inadequate PoE budgeting on the switches 
B. layer one interference near the underperforming APs
C. too many legacy clients connecting to the slower APs
D. a different number of client stations connecting to the APs
Inadequate PoE budgeting on the switches can result in APs shutting down radio
chains and using lower data rates. Not all PoE clients use the same amount of
power. You should plan for total power consumption on a switch based upon the
aggregation of power consumption from all connected devices.
The correct answer is: inadequate PoE budgeting on the switches
Check
Check
/
Question 14
Correct
1.00 points out of
1.00
Question 15
Correct
1.00 points out of
1.00
Which technique is used to transmit data over analog wave forms?
Select one:
A. Modulation 
B. Transmission
C. Signal spread
D. Phase alignment
Modulation is digital communication (binary data bits) over analog waveforms. It is the
process of varying one or more properties of a high-frequency periodic waveform,
called the carrier signal, with a modulating signal which typically contains information
to be transmitted.
The correct answer is: Modulation
Which device increases the amplitude of an RF signal?
Select one:
A. AmplifierB. Attenuator
C. Antenna
D. Mid-span injector
Active gain is accomplished by placing an amplifier on the cable that connects the
radio to the antenna. Amplifiers are typically bidirectional and increase the AC voltage
used for both inbound and outbound communications. Active gain devices require the
use of an external power source.
The correct answer is: Amplifier
Check
Check
/
Question 16
Correct
1.00 points out of
1.00
Question 17
Correct
1.00 points out of
1.00
Why is 5 GHz preferred for use in a high density deployment than 2.4 GHz?
Select one:
A. 5 GHz channels overlap.
B. 5 GHz has more channels. 
C. More legacy devices support 5 GHz.
D. 5 GHz propagates farther with less power.
5 GHz has more channels allowing you to create less crowed contention domains.
The correct answer is: 5 GHz has more channels.
Which name is given to the RF area where the AP and stations can communicate with
each other?
Select one:
A. The Basic Service Set Area 
B. The Contention Domain
C. The Coverage Area
D. The Extended Service Set
The Basic Service Set Area is the RF area where the AP and stations can
communicate with each other
The correct answer is: The Basic Service Set Area
Check
Check
/
Question 18
Incorrect
0.00 points out of
1.00
Question 19
Correct
1.00 points out of
1.00
Which RF phenomenon occurs when an RF signal passes through an object, and is
not reflected by the object, resulting in a reduction in the signal’s amplitude?
Select one:
A. Absorption
B. Diffraction
C. Refraction 
D. Scattering
Absorption occurs when an RF signal passes through an object and is not reflected by
the object. The signal may be completely absorbed or only partially absorbed resulting
in a weaker signal after having passed through the object. Many materials absorb RF
signals.
The correct answer is: Absorption
What does Distributed Coordination Function (DCF) do in a Wi-Fi network?
Select one:
A. allows fair access for all stations 
B. prioritizes traffic based upon QoS tagging
C. prioritizes traffic based upon application use
D. allows higher data rates when using mixed mode
Distributed Coordination Function (DCF) allows fair access to the medium for all
stations. There is no prioritized access for stations based on application. It allows
only one transmission at a time.
The correct answer is: allows fair access for all stations
Check
Check
/
Question 20
Correct
1.00 points out of
1.00
What name is given to a wireless network that has two or more APs connected to the
same distribution system? 
Select one:
A. Basic Service Set (BSS)
B. Co-located Service Set (CSS)
C. Distribution Service Set (DSS)
D. Extended Service Set (ESS) 
When you have two BSSs connected by a shared distribution network, this is known
as an Extended Service Set (ESS). The APs in an ESS may or may not have the
same SSID and security configurations.
The correct answer is: Extended Service Set (ESS)
Check