1.0 RF Fundamentals

Descrição

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 por Christopher Griffin, atualizado more than 1 year ago
Christopher Griffin
Criado por Christopher Griffin mais de 7 anos atrás
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Resumo de Recurso

Questão 1

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

Questão 2

Questão
Number of times a signal completes a cycle 1 second.
Responda
  • frequency
  • cycle
  • rotation
  • rate

Questão 3

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

Questão 4

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

Questão 5

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

Questão 6

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

Questão 7

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

Questão 8

Questão
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.
Responda
  • Phase
  • Wave
  • Frequency
  • amplitude

Questão 9

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

Questão 10

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

Questão 11

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

Questão 12

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

Questão 13

Questão
Define Term - MCS
Responda
  • mobile controller system
  • modulation and coding schemes
  • metric call system
  • none

Questão 14

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

Questão 15

Questão
To provide robust wireless coverage to an ever-increasing area, you should:
Responda
  • 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

Questão 16

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

Questão 17

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

Questão 18

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

Questão 19

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

Questão 20

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

Questão 21

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

Questão 22

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

Questão 23

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

Questão 24

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

Questão 25

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

Questão 26

Questão
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.
Responda
  • Autonomous AP
  • FlexConnect
  • LAP
  • Converge Network

Questão 27

Questão
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.
Responda
  • Cloud-based Architecture
  • Autonomous
  • FlexConnect
  • Central APs

Questão 28

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

Questão 29

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

Questão 30

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

Questão 31

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

Questão 32

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

Questão 33

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

Questão 34

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

Questão 35

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

Questão 36

Questão
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.
Responda
  • True
  • False

Questão 37

Questão
What is a band and number of channels for 2.4 GHz range?
Responda
  • 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

Questão 38

Questão
The channel spacing is known as the
Responda
  • channel separation
  • uplink
  • channel bandwidth
  • number of frequencies

Questão 39

Questão
According to power measurements, which are absolute powers
Responda
  • watts
  • milliwatts
  • centimeters
  • amps

Questão 40

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

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