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1.0 RF Fundamentals

Description

1.1 Describe the propagation of radio waves 1.2 Interpret RF signal measurements 1.3 Explain the principles of RF mathematics 1.4 Describe Wi-Fi antenna characteristics
Christopher Griffin
Quiz by Christopher Griffin, updated more than 1 year ago
Christopher Griffin
Created by Christopher Griffin about 8 years ago
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Resource summary

Question 1

Question
What is a measure of the antenna’s focus.
Answer
  • beamwidth
  • frequency
  • cycle
  • wave

Question 2

Question
Number of times a signal completes a cycle 1 second.
Answer
  • frequency
  • cycle
  • rotation
  • rate

Question 3

Question
A signal rising from the center line, falls through the center line, and rises again to meet the center line.
Answer
  • rate
  • cycle
  • frequency
  • amplitude

Question 4

Question
The most commonly used frequency unit and is nothing other than one cycle per second.
Answer
  • miliwatts
  • hertz
  • decibel
  • volts

Question 5

Question
What two main frequency ranges used for wireless LAN communication
Answer
  • 5 GHz
  • 2.4 MHz
  • 2.4 GHz
  • 4.0 MHz

Question 6

Question
Technique which uses specific numbers and is assigned to a specific frequency.
Answer
  • channel
  • wave
  • scheme
  • frequency

Question 7

Question
The frequency range needed to transmit a signal, used by a single channel or a single RF signal.
Answer
  • electric band
  • bandwidth
  • amplitude
  • phase

Question 8

Question
The signal is a measure of shift in time relative to the start of a cycle. Phase is normally measured in degrees, where 0 degrees is at the start of a cycle, and one complete cycle equals 360 degrees.
Answer
  • Phase
  • Wave
  • Frequency
  • amplitude

Question 9

Question
A measure of physical distance that a wave travels over one complete cycle.
Answer
  • phase
  • bandwidth
  • wavelength
  • frequency

Question 10

Question
The height from the top peak to the bottom peak of the signal’s waveform,
Answer
  • phase
  • wavelength
  • Frequency
  • Amplitude

Question 11

Question
The strength of an RF signal is usually measured by its power, in ________.
Answer
  • Volts
  • Amps
  • wavelength
  • Watts

Question 12

Question
Define Term - DRS.
Answer
  • Defense sequence spectrum
  • Dynamic rate shifting
  • Define Rate Scale
  • Does Rate System

Question 13

Question
Define Term - MCS
Answer
  • mobile controller system
  • modulation and coding schemes
  • metric call system
  • none

Question 14

Question
In a BSS, if you disable lower data rates
Answer
  • effectively reduces the usable size of the AP’s cell
  • radio frequency (RF) footprint remains the same
  • no changes
  • higher throughput

Question 15

Question
To provide robust wireless coverage to an ever-increasing area, you should:
Answer
  • Add more power
  • Add additional APs to build an ESS that covers more area.
  • remove clients from BSS
  • Tune the cell size based on data rates and performance

Question 16

Question
The process of moving an association from one AP to the next, so that the wireless connection is maintained as the client moves.
Answer
  • FlexConnect
  • Roaming
  • Uplink
  • BSS

Question 17

Question
You should lay the cells out, which the pattern is seamless, leaving no holes in coverage.
Answer
  • Honeycomb
  • Isolation from interference
  • BSA
  • Small Space

Question 18

Question
Alternating channels to avoid overlap is commonly
Answer
  • Channel Reuse
  • Honeycomb
  • Three-dimension space
  • Flow Pattern

Question 19

Question
Needed to automatically determine the location of wireless devices.
Answer
  • real-time location services (RTLS)
  • modulation and coding (MCS)
  • Radio Resource Meter (RRM)
  • Dynamic Channel Allocation (DCA)

Question 20

Question
Site survey tools can be grouped into three basic categories based on their installation base:
Answer
  • Standalone
  • Open-Standard
  • Server-based
  • Cloud-based

Question 21

Question
Three basic types of site survey that you can perform as you plan and deploy a wireless network:
Answer
  • Predictive survey
  • Passive survey
  • Active survey
  • Standalone

Question 22

Question
Analyze the environment to select AP locations when no APs have been deployed yet;
Answer
  • Predictive survey
  • MCS
  • Honeycomb
  • Passive survey

Question 23

Question
What tool to detect and identify any sources of interference you might encounter in the wireless coverage area.
Answer
  • spectrum analyzer
  • Mapping Tool
  • Fluke Networks
  • RRM

Question 24

Question
Which tools perform predictive site survey:
Answer
  • Ekahua Site Survey
  • Fluke Networks AirMAgnet Survey Pro
  • PI
  • MetaGeek Chanalyzer

Question 25

Question
To measure the effects of any existing APs in an area,
Answer
  • Passive
  • Active
  • Spectrum Analyzer
  • RRM

Question 26

Question
AP is self-contained; it is equipped with both wired and wireless hardware so that the wireless client associations can be terminated onto a wired connection locally at the AP.
Answer
  • Autonomous AP
  • FlexConnect
  • LAP
  • Converge Network

Question 27

Question
To help manage more and more autonomous APs as the wireless network grows, AP management function is pushed out of the enterprise and into the Internet cloud.
Answer
  • Cloud-based Architecture
  • Autonomous
  • FlexConnect
  • Central APs

Question 28

Question
This logical plan used traffic used to control, configure, manage, and monitor the AP itself
Answer
  • Control plane
  • Data plane
  • MCS
  • Central Routing

Question 29

Question
This logical plan used end-user traffic passing through the AP.
Answer
  • Data Plane
  • ACI
  • Control Plane
  • Trunk

Question 30

Question
In a split-MAC Architectures which of the following are management functions:
Answer
  • RF Management
  • MAC Management
  • Encryption
  • RF Transmit/Receive

Question 31

Question
In a split-MAC Architectures which of the following are management functions:
Answer
  • Client Authentication
  • QOS
  • Security Management
  • MAC Management

Question 32

Question
LAP gets its name because the code image and the local intelligence are stripped down, or lightweight, compared to the traditional autonomous AP.
Answer
  • True
  • False

Question 33

Question
The management functions are usually performed on a access switch, Split-MAC Architectures
Answer
  • True
  • False

Question 34

Question
Tunneling protocol makes this all possible by encapsulating the data between the LAP and WLC within new IP packets.
Answer
  • CAPWAP
  • RRM
  • WAP-TLS
  • Trunk

Question 35

Question
Messages are authenticated, encrypted, and used for exchanges that are used to configure the LAP and manage its operation over port 5246.
Answer
  • CAPWAP control messages
  • Roaming Control
  • CAPWAP data
  • Trunk

Question 36

Question
Every LAP and WLC must also authenticate each other with digital certificates. An X.509 certificate is preinstalled in each device when it is purchased.
Answer
  • True
  • False

Question 37

Question
What is a band and number of channels for 2.4 GHz range?
Answer
  • 4.075 - 4.875 and 1 thru 14
  • 4.125 - 4.805 and 3 thru 14
  • 2.412 - 2.484 and 1 thru 14
  • 2.125 - 2.805 and 3 thru 14

Question 38

Question
The channel spacing is known as the
Answer
  • channel separation
  • uplink
  • channel bandwidth
  • number of frequencies

Question 39

Question
According to power measurements, which are absolute powers
Answer
  • watts
  • milliwatts
  • centimeters
  • amps

Question 40

Question
The decibel (db) is a handy function used logartihms to compare absolute measurement.
Answer
  • True
  • False
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