examen final 1

1 What does a wireless bridge associate with if it is configured as
  Root=ON?

xclients and repeaters only
other Root=ON devices
Master bridge
no device since it is in maintenance mode




2 Which device decodes the various protocol layers in a recorded frame
  and presents them as readable abbreviations or summaries?

cable tester
xnetwork analyzer
spectrum analyzer
time domain reflectometer



3 In a WLAN, what is the purpose of the common DS?

xto allow communication between multiple BSSs thereby allowing mobile
 devices to roam without loss of connectivity
to reduce the number of APs needed to provide reliable connectivity while roaming
to eliminate the need for connectivity to a wired network
to eliminate the need for station addressing when in roaming mode



4 What is the WEP key size specified in the 802.11 standard?

256 bit
64 bit and 128 bit
40 bit and 128 bit
x40 bit



5 In addition to physically installing the client adapter card into the wireless
 station, what is needed for functionality of the card?

a universal client adapter software driver
an interoperability software patch
a client adapter driver with its corresponding AP driver
xa client adapter software driver specific to the OS




6 During a routine wireless benchmark inspection, the IT personnel
 of the bank discovered that the AP in the lobby was transmitting at 60 mW.
 The AP connects to a 6-dBi gain omni-directional antenna through a cable
 with a 3-dB loss. What is the final power output radiated by the antenna element?

30 mW
60 mW
x120 mW
180 mW




7 dBm is a reference to which unit of measure?

xmilliWatt
microWatt
Watt
kiloWatt




8 In DSSS technology, each data bit becomes a chipping sequence.
  How many chips per bit are used by the IEEE 802.11 standard?

x11
12
13
15




9 The network administrator wants to ensure that his Aironet bridges are
  transmitting within the 802.11b WLAN power level of 36 dBm established by
  the United States FCC. Currently the bridges are transmitting at 25 dBm.
  The omni-directional antenna results in a 12 dBi gain. The cabling results in a
   loss of 6.8 dBi per 100 feet of cabling. 25 feet of cabling is installed. What is the
   EIRP in dB?

34.2
x35.3
36.1
36.4




10 Which statements describe the RF spectrum? (Select two.)

xIt encompasses both radio waves and microwaves.
Most of the frequencies in the spectrum are unlicensed.
It extends from about 9 MHz to thousands of GHz.
xIt is used heavily for communications.
The acronym stands for radiated frequency (RF).




11 What frequency or frequencies does the IEEE 802.11 standard utilize?

900 MHz
3.4 GHz
5.4 GHz
x2.4 GHz and 5 GHz
900 MHz, 2.4 GHz and 5.4 GHz




12 What is the best tool to use if there may be a radio interference problem?

cable tester
gauss meter
xspectrum analyzer
time domain reflectometer




13 How wide of a band of frequencies is used by 802.11b DSSS?

5 Mhz
11 Mhz
x22 Mhz
24Mhz




14 Access points often have two antennas attached to them for diversity
    in signal reception. What are two purposes of this diversity? (Select two.)

xhelps prevent multipath distortion
helps increase signal strength
xhelps eliminate null coverage areas
helps prevent diffraction and scattering of the signal




15 Which type of antenna is referenced as a base in a dBd rating?

plane
yagi
xdipole
isotropic



16 What are the effects of multipath interference? (Select two.)

xdistorted signals at the receiving end
increased coverage range
xpoor signal quality levels
enhanced data throughput
incorrect polarization




17 At which OSI layer or layers does a wireless AP operate?

xLayer 1
Layers 1 and 2
Layer 2
Layers 2 and 3




18 Which of the following antenna types could be used for a point-to-multipoint
   connection?

patch wall
xmast mount
Yagi
solid dish




19 Which type of antenna connectors are used by the Cisco
    Aironet Bridges?

polarized BNC
xreverse TNC
polarized TNC
reverse BNC




20 Which open standard operating system is licensed for use in many
   mobile computing devices?

xSymbian
MS DOS
Windows XP
OS/2




21 Why do APs have two antennas attached to them?

xto increase coverage area
to provide diversity
to provide redundancy
to provide symmetry




22 Which frequency spectrum do FHSS WLANs use in the United States?

83 Mhz around the 5 Ghz ISM band
x83 Mhz around the 2.4 Ghz ISM band
900 Mhz around the 5 Ghz ISM band
900 Mhz around the 2.4 Ghz ISM band




23 What are the three basic options for configuration on a Cisco
  Aironet 350 series bridge? (Select three.)

xWeb-browser interface
SNTP
xCLI
CDP
SNMP
SSID



24 Cisco Aironet bridges operate at which layer of the OSI model?

physical
xdata-link
network
transport




25 What is the behavior of a wireless bridge when configured as a
     root bridge?

It associates and communicates with any wireless device on the network.
It associates and communicates only with other root bridges.
It associates and communicates with multiple non-root bridges but only a single root bridge.
xIt associates and communicates with multiple non-root bridges but will not communicate with other root bridges.




26 In the graphic, which type of cable should be used at the arrow to
    protect the WLAN against a direct lightning strike?

coax
xfiber-optic
Category 5
UTP




27 What are the two methods used by wireless clients to connect to an
    AP according to the IEEE 802.11 standard? (Select two.)

xOpen authentication
xshared key authentication
private key authorization
closed authentication
restricted authentication




28 Which types of transmission medium are available for use by
    WLANs? (Select two.)

fiber-optic
xinfrared light
UTP
xradio frequencies
STP




29 Which of the following antenna types are used for wireless
    bridges? (Select three.)

rubber dipole
xpatch wall
xYagi
Ground Plane
xsolid dish




30 Which two spread spectrum modulation techniques are used by
    WLANs? (Select two.)

FDSS
ODSS
xDSSS
DFSS
xFHSS




31 What causes the Status LED to blink green in a 1200 series AP?

transmitting/receiving packets
no devices associated
general warning
xno special meaning




32 What is a good antenna to use with an AP to provide coverage for
    a long indoor hallway?

5.2 dBi Ground Plane
x8.5 dBi Patch Wall
2.15 dBi Rubber Dipole
2.2 dBi Ceiling Mount




33 What is the best way to test the line-of-sight path when doing a
     site-to-site survey?

visually
with a spectrum analyzer
both visually and with a spectrum analyzer
xvisually and with a Global Positioning System




34 How does an AP behave when the receive antenna is set to diversity?

xIt will use the antenna that receives the best signal.
It will use both antennas at the same time.
It will round-robin between the two antennas.
The AP will always use one antenna to transmit and the other to receive.




35 What are the keys to maintaining a problem-free network environment
    and having the ability to isolate and fix a network fault quickly? (Select three).

xcommunication
data backup
xdocumentation
xplanning
virus protection
fault tolerance




36 Which type of threats originate from hackers who are more highly
     motivated and technically competent?

external
internal
xstructured
unstructured




37 Bit Flipping, Replay Attacks, and Weak IV collection are all considered
      attacks against which type of security?

xWEP
LEAP
PEAP
IPSec




38 What is the difference between higher gain antennas and lower gain
     antennas? (Select two.)

xHigher gain antennas direct energy more precisely.
xHigher gain antennas have narrower beamwidths.
Higher gain antennas have a greater chance of receiving interference.
Higher gain antennas have lower bandwidths.




39 When using high gain omnidirectional antennas, what is helpful in
    reducing the poor coverage below the antenna?

diversity
polarization
amplifiers
xdowntilt




40 Most data collection devices operate at which speed?

1 Mbps
x2 Mbps
5 Mbps
11 Mbps




41 Which three power modes are available on a Wireless NIC? (Select three.)

xCAM
FastCAM
xPSP
xFastPSP
FastAPA




42 When using the site survey tool, a specific mode causes the client
    adapter to actively send or receive low-level RF packets to and from
     its associated AP and provides information on the success rate. Which
      mode accomplishes these functions?

repeater mode
stand-alone mode
passive mode
xactive mode
parallel mode




43 The ACU site survey tool can operate in which modes? (Select two.)

repeater mode
stand-alone mode
xpassive mode
xactive mode
parallel mode




44 When configuring the AP Radio Port Hardware setup page,
    which settings are recommended in situations where communication
    is poor and many client devices are associating with the access point?

low fragment threshold and high RTS threshold
high fragment threshold and high RTS threshold
high fragment threshold and low RTS threshold
Xlow fragment threshold and low RTS threshold




45 Which types of software should be installed on laptops to prevent
    harmful disruptions while they are operating on public wireless
    networks? (Select two.)

spectrum analyzer
xantivirus
xfirewall
protocol analyzer
repair utility




46 For a standard survey, how much overlap is sufficient to provide
    transparent handoffs between APs?

10%
x15%
20%
25%
30%




47 In the United States, how many nonoverlapping channels are there
    for the 802.11b standard?

xthree
four
seven
eight




48 When a WLAN is being designed to expand an existing LAN, what should
    be done during the design phase? (Select three.)

Select the carrier.
xLearn about the current topology and physical structure.
xStudy the actual network performance.
Provide an estimation of costs for the new equipment needed.
xIdentify the links that must be replaced.




49 At which layer of the OSI model do wireless bridges and APs operate?

Layer 4
Layer 3
xLayer 2
Layer 1




50 Which of the following statements are correct? (Select two.)

xLonger cables lose more power than shorter ones.
Thick cables lose more power than thin ones.
xHigher frequencies lose more power than lower ones.
Rigid cables lose more power than flexible ones.




51 Which topics may be included in the Request for Proposal?
   (Select three.)

x prices and payment options
 workstations and servers specifications
x an implementation plan
x a network topology for the new design




52 Which command is used to set the parent AP for a repeater AP?

 AP(config)# parent 10.0.0.1
 AP(config-if)# parent 1 10.0.0.1
X AP(config-if)# parent 1 abcd.1234.ab12
 AP(config)# parent abcd.1234.ab12




53 In WLAN data transmission, what is the significance of having four
      different IFS intervals?

to increase the amount of data that can be transmitted at one time
to prevent collisions when accessing the wireless media
to resequence data units at the destination STA
xto provide priority levels for access to the wireless media 

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