QUESTION 1
Which of the following is a variation of spread-spectrum technology use in
wireless local-area networks? (Choose three.)
Orthogonal frequency-division
multiplexing (OFDM)
WPA - 2
Frequency-hopping spread spectrum
(FHSS)
WEP
Wi-Fi
Direct-sequence spread spectrum (DSSS)
1 points
QUESTION 2
The strength of the electromagnetic waves being radiated from an antenna is
referred to as gain, which involves a measurement of both direction and
efficiency of a transmission. Gain is commonly measured using the dBi unit
of measure.
True
False
1 points
QUESTION 3
WPA2 uses Counter Mode with Cipher Block Chaining Message Authentication
Code Protocol (CCMP) for integrity checking and Data Encryption Standard
(DES) for encryption.
True
False
1 points
QUESTION 4
What is the 802.11 2.4-GHz band channel width?
40
MHz
5 MHz
12
MHz
22
MHz
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1 points
QUESTION 5
The wireless device that is marked X in the following image is a ________.
wireless router
wireless access
point
wireless
controller
wireless switch
1 points
QUESTION 6
To protect WLAN traffic from eavesdroppers, a variety of security standards
and practices have been developed, including all of the following except
what?
Preshared key
IEEE 802.1X
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Enabling SSID
broadcast
MAC address
filtering
1 points
QUESTION 7
Which of the following is not a WLAN security standard?
WPA
WPA
2
WEP
WAP
1 points
QUESTION 8
WLAN security based on a PSK technology is called ________ mode.
home
WEP
perso
nal
privat
e
1 points
QUESTION 9
Which of the following are broad categories of wireless antenna that are
based on coverage? (Choose two.)
Wired Equivalent Protocol
(WEP)
Omnidirectional
WLAN
SSID
Unidirectional
1 points
QUESTION 10
Which IEEE standard is used to authenticate wireless clients?
802.2
af
802.3
ac
802.1
1i
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802.1
X
1 points
QUESTION 11
What transmission method is used with IEEE 802.11ac?
FHSS
OFD
M
FHD
M
DSSS
1 points
QUESTION 12
What is the encryption mechanism that is used with the WPA2 security
standard?
AES
RC4
SHA1
MD5
1 points
QUESTION 13
An omnidirectional antenna radiates power at relatively unequal power levels
in all directions (somewhat similar to the theoretical isotropic antenna).
True
False
1 points
QUESTION 14
Which channel is not one of the non-overlapping channels when using the
802.11 2.4-GHz band?
5
1
6
1
1
1 points
QUESTION 15
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Which of the following wireless standards operate at a maximum bandwidth
of less than 20 Mbps? (Choose two.)
802.1
1g
802.1
1
802.1
1b
802.1
1a
1 points
QUESTION 16
WLANs can be categorized based on their use of wireless APs. The three
main categories are ________, ________, and ________.
IBSS, BSS, ESS
IBSS, BSS,
RSS
HBSS, BSS,
IBSS
HBSS, BSS,
ESS
1 points
QUESTION 17
WLANs use a technology called carrier sense multiple access collision
detection (CSMA/CD).
True
False (It is CSMA/CA)
1 points
QUESTION 18
When a wireless channel uses more than one frequency, the transmission
method is called a ________ spectrum.
multi
long
broa
d
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spre
ad
1 points
QUESTION 19
Which of the following is not a variation of spread-spectrum technology?
DSSS
FHSS
DFSS
OFD
M
1 points
QUESTION 20
Which is not a security threat for WLANs?
WEP and WPA security
cracking
Rogue access point
Wardialing
Warchalking
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