MIS 3317 - Quiz 3
A change in power from 100 W to 1 W corresponds to approximately ________ decibels. A) 10 B) 20 C) -10 D) -20
-20
If there is an access point that serves eight wireless hosts, on how many channels will these devices transmit and receive during the course of an hour or two? A) 1 B) 2 C) 8 D) 9
1
16) In 802.11i PSK mode, the pass phrase should be at least ________ characters long. A) 8 B) 12 C) 20 D) 128
20
The 2.4 GHz band supports ________ possible non-overlapping 20 MHz channel(s). A) 1 B) 3 C) 7 D) 11
3
Compared to an omnidirectional antenna, a dish antenna quadruples radiated power. How much is this change in decibels? A) 6 dB B) 9 db C) 16 db D) none of the above
6 dB
We use the terms Wi-Fi and ________ interchangeably in this book. A) 802.1 B) 802.3 C) 802.11 D) 802.1X
802.11
Wi-Fi Standards come from the ________ Working Group. A) 802.1 B) 802.3 C) 802.11 D) 802.1X
802.11
A Bluetooth profile for sending a command from a wireless light switch to a lamp is probably a ________ profile. A) classic Bluetooth B) Bluetooth LE C) both A and B D) neither A nor B
Bluetooth LE
The 802.11 standard has two mechanisms for media access control. Of the two, ________ is mandatory. A) MAC B) CSMA/CA+ACK C) RTS/CTS D) CSMA/CD
CSMA/CA+ACK
Which is one of the only two reliable protocols we have seen this term? A) IP B) CSMA/CA+ACK C) UDP D) 802.3
CSMA/CA+ACK
Which of the following is more efficient and faster? A) CSMA/CA+ACK B) RTS/CTS C) Both are about equally efficient and fast.
CSMA/CA+ACK
In CSMA/CA, CS means ________. A) cancel sending B) counter-source C) carriage suspension D) carrier sense
Carrier Sense
T/F 802.11i can defeat rogue access points.
False
T/F Employees who set up rogue access points usually have malicious motives.
False
T/F If two products both comply with 802.11 ac, their performance will always be similar.
False
T/F In a Wi-Fi LAN, wireless hosts generally send frames directly to one another.
False
T/F Nearly all public Wi-Fi hotspots encrypt your transmissions.
False
T/F Within a BSS (and without MU-MIMO), the access point and a wireless host it serves can transmit at the same time.
False
Most wireless systems operate in the ________ range. A) hz B) kHz C) MHz D) GHz
GHz
Bluetooth ________ is likely to be used most of the time in IoT transmission. A) HDR B) HS C) LE D) COIN
LE
Which of the following allows access point transmission two wireless clients simultaneously? A) CSMA/CA+ACK B) MIMO C) MU-MIMO D) none of the above
MU-MIMO
________ is a technique for preventing two wireless stations from interfering with each other by transmitting at the same time. A) Creating extended service sets B) Roaming C) The distribution system D) Media access control
Media access control
________ is a wireless network standard. A) OSI B) TCP/IP C) both A and B D) neither A nor B
OSI
A group of devices on a desk that communicate wirelessly is called a ________. A) LAN B) WAN C) MAN D) PAN
PAN
In 802.11i ________, hosts must know a shared initial key. A) 802.1X initial authentication mode B) PSK initial authentication mode C) both A and B D) neither A nor B
PSK initial authentication mode
In ________, when a wireless host wishes to send, it first sends a message to the wireless access point asking for permission to send. When the access point sends back a response, the host sending the original message may transmit. All other hosts must wait. A) CSMA/CA+ACK B) CSMA/CA C) CSMA/CD D) RTS/CTS
RTS/CTS
To connect to an access point, you must know its ________. A) SSID B) ESSID C) IP address D) Wi-Fi ID
SSID
To use an access point, you need to know its ________. A) SSID B) BSSID C) ESSID D) Wi-Fi ID
SSID
Which of the following secures communication between the wireless computer and the server it wishes to use against evil twin attacks? A) VLANs B) VPNs C) 802.1X mode D) none of the above
VPNs
The Wi-Fi Alliance calls 802.11i ________. A) WEP B) WPA C) WPA2 D) none of the above
WPA2
Wi-Fi is a term used by the ________. A) IEEE B) Wi-Fi Alliance C) both A and B D) neither A nor B
Wi-Fi Alliance
________ have SSIDs. A) Wireless clients B) Wireless access points C) both A and B D) neither A nor B
Wireless access points
________ can operate in the 2.4 service band. A) Zigbee B) Z-Wave C) both A and B D) neither A nor B
Zigbee
In 802.11i, protection is provided between the client and the ________. A) access point B) switch C) router D) server
access point
Zigbee is designed to be used in a(n) ________ network. A) one-to one B) hierarchical C) multipoint D) ad hoc
ad hoc
In Bluetooth LE, ________ notify other Bluetooth devices that it is available. A) advertisements B) beacons C) both A and B D) neither A nor B
advertisements
You should use a VPN ________. A) if you know that an evil twin access point is in use. B) if you know that your device has been compromised by an evil twin attack. C) always D) never
always
A rogue access point is usually created by ________. A) an employee B) an external attacker C) the IT security department D) an evil twin
an employee
Which of the following is an ad hoc networking protocol? A) Zigbee B) Z-Wave C) both A and B D) neither A nor B
both A and B
Which of the following is true of 802.11ay over 802.11ad? A) greater propagation speed B) greater propagation distance C) both A and B D) neither A nor B
both A and B
Which of the following is true of Bluetooth? A) A master may have multiple slaves. B) A slave may have multiple masters. C) both A and B D) neither A nor B
both A and B
Which of the following uses OFDM? A) 802.11ac B) 802.11n C) both A and B D) neither A nor B
both A and B
Channels with wide bandwidths are called ________ channels. A) multimode B) full-duplex C) broadband D) parallel
broadband
To transmit data very rapidly, you would want a ________ channel. A) narrowband B) broadband C) single-frequency band D) single-mode
broadband
After two wireless clients authenticate themselves via PSK to an access point, they will use ________ to communicate with the access point. A) the preshared key B) an 802.1X key C) WPA keys D) different pairwise session keys
different pairwise session keys
If Wi-Fi supported the basic printing profile, ________. A) documents could be printed without downloading drivers B) printer drivers would be downloaded automatically C) printing would use two layers of drivers D) none of the above
documents could be printed without downloading drivers
A VPN provides ________. A) link security B) end-to-end security C) comprehensive security D) none of the above
end-to-end security
Wireless radio transmission speed is usually measured in terms of ________. A) wavelength B) frequency C) amplitude D) dollars
frequency
Wi-Fi standards use unlicensed bands for ________ A) greater speed B) greater standardization C) greater flexibility D) greater privacy
greater flexibility
Spread spectrum transmission's wider channels brings ________. A) greater speed B) greater reliability C) greater security D) none of the above
greater reliability
If you triple channel bandwidth, what happens to the number of channels in a service band? A) It triples. B) It increases by a factor of nine. C) It is reduced a third. D) It is reduced a ninth.
it is reduced a third
Spread spectrum transmission is used in WLANs because ________. A) it is required by regulators B) it offers strong security C) both A and B D) neither A nor B
it is required by regulators
When a receiver transmits an ACK, ________. A) it must use CSMA/CA B) it must use CSMA C) in must use CA D) it must transmit immediately
it must transmit immediately
NFC transmission standards have been set for ________. A) its service band B) mesh networking C) both A and B D) neither A nor B
its service band
In IoT device transmission, published distance limits are relevant for ________. A) legitimate users B) hackers C) both A and B D) neither A nor B
legitimate users
In an extended service set, each access point ________. A) must have the same SSID B) must have a different SSID C) must have a coordinated SSID D) none of the above
must have the same SSID
If a drive-by hacker succeeds in connecting to an internal access point, the network traffic is ________. A) still protected by a firewall B) still protected by encryption C) both A and B D) neither A nor B
neither A nor B
What propagation problem becomes worse as frequency increases? A) inverse square law attenuation B) electromagnetic interference C) both A and B D) neither A nor B
neither A nor B
Centralized access point management ________. A) increases management costs but provides better control B) reduces management costs
reduces management costs
CSMA/CA+ACK is ________. A) unreliable B) reliable C) semireliable
reliable
Wireless access points typically link wireless clients to ________. A) wireless servers B) servers on the wired network C) both A and B
servers on the wired network
Wi-Fi operates in the 2.4GHz and 5GHz ________. A) frequencies B) spectrums C) channels D) service bands
service bands
What propagation problem becomes worse when there is a large, and dense, object between sender and receiver? A) multipath interference B) shadow zones (dead zones) C) inverse square law attenuation D) none of the above
shadow zones (dead zones)
An 802.11ac Wi-Fi compatibility testing profile contains ________ of the features of the 802.11ac. A) all B) nearly all C) some D) none
some
The frequency spectrum extends ________. A) into the gigahertz range B) into the visible light range C) into the ultraviolet range D) to infinity
to infinity
The main problem with the 60 GHz unlicensed band is that ________. A) it cannot be used outside B) it does not support MIMO C) transmission speed is low D) transmission distance is short
transmission distance is short
If a company uses 802.11i for its core security protocol, an evil twin access point will set up ________ 802.11i connection(s). A) one B) two C) four D) none of the above.
two
Communication after authentication is protected most strongly if the ________ initial authentication is used. A) PSK B) 802.1X C) WPA D) It does not matter which initial authentication mode is used.
It does not matter which initial authentication mode is used
In general, the fewer the channels, ________. A) the greater the likelihood of interference between access points B) the smaller the individual channels will be C) both A and B D) neither A nor B
the greater the likelihood of interference between access points
Access points take ________ from wireless devices and send them on to devices on the wired LAN. A) packets B) frames C) both A and B D) neither A nor B
packets
Today, Wi-Fi sales are dominated by ________. A) 802.11a B) 802.11g C) 802.11n D) 802.11ac
802.11ac
________ is among the most widely used 802.11 transmission standards used today. A) 802.11g B) 802.11ac C) both A and B D) neither A nor B
802.11ac
Which of the following works in the 60 GHz unlicensed service band? A) 802.11ac B) 802.11ad C) 802.11ax D) all of the above
802.11ad
What is the strongest security protocol for 802.11 today? A) 802.11s B) 802.11X C) WPA D) 802.11i
802.11i
In what initial authentication mode of 802.11i is a central authentication server used? A) 802.1X B) PSK C) both A and B D) neither A nor B
802.1X
Simple installation rules are sufficient to reduce propagation problems to nonissues in ________. A) 802.3 B) 802.11 C) both A and B D) neither A nor B
802.3
Which offers stronger security? A) WPA B) 802.11i C) both A and B offer equally strong security.
802.11i
17) If a firm has many access points, it should use ________ initial authentication mode in 802.11i. A) PSK B) 802.1X C) IPsec D) WPA
802.1X
A change in power from 2 mW to 17 mW corresponds to approximately ________ decibels. A) 3 B) 9 C) 12 D) 20
9
After authentication in 80.11i PSK mode, a wireless client communicates with the access point via a(n) ________ key. A) VPN B) pairwise session C) 802.1X D) preshared
pairwise session
A single access point, and the set of hosts it serves, is called a(n) ________. A) BSS B) BSSID C) ESS D) none of the above
BSS
In roaming, a wireless client moves from one ________ to another without losing its connection. A) ESS B) BSS C) SSID D) none of the above
BSS
T/F You can test whether an evil twin attack has taken place against your wireless client.
False
An access point can transmit to more than one wireless client at a time with ________. A) bonding B) MIMO C) Multiuser MIMO D) CSMC/CA+ACK
Multiuser MIMO
802.11i PSK initial authentication mode was created for ________. A) corporations with multiple access points B) residences with a single access point C) residences with less than eight access points D) corporations with less than eight access points
residences with a single access point
A ________ is an unauthorized internal access point. A) binky B) shadow C) rogue D) none of the above
rogue
In CSMA/CD+ACK, when a wireless NIC wishes to transmit, it listens for traffic. If there is traffic, it waits. When the traffic stops, it may transmit immediately. A) always true B) sometimes true C) always false
sometimes true
Signals in a transmission usually ________. A) travel at a single frequency B) spread over a range of frequencies C) spread over the entire frequency distribution D) spread over the entire service band
spread over a range of frequencies
Multipath interference is mitigated through ________. A) broadband transmission B) MIMO C) beamforming D) spread spectrum transmission
spread spectrum transmission
What is the main promise of 802.11ax over 802.11ac? A) higher speed B) the ability to serve more users C) MIMO D) Mu-MIMO
the ability to serve more users
Wireless network standards operate at ________. A) the data link layer B) the Internet layer C) both A and B D) neither A nor B
the data link layer
Access points in the same ESS communicate via ________. A) wireless transmission B) the distribution system C) a master access point D) routers
the distribution system
When a wireless client in an evil twin attack transmits, ________. A) the evil twin reads the packet, encrypts it, and passes on the packet B) the evil twin reads the frame, encrypts it, and passes on the frame C) the evil twin reads the packet and passes on the packet D) the evil twin reads the frame and passes on the frame
the evil twin reads the frame, encrypts it, and passes on the frame
An evil twin access point is usually ________. A) a database B) a laptop computer C) a calculator D) a spreadsheet
a laptop computer
If an 802.11n client tries to use an 802.11ac access point, ________. A) they will not be able to communicate B) they will communicate using 802.11n C) they will communicate using 802.11ac D) either B or C
they will communicate using 802.11n
MIMO ________. A) bonds two or more channels for higher speed B) is used in all forms of 802.11 C) uses a single spatial stream but multiple signals D) transmits multiple signals in the same channel
transmits multiple signals in the same channel
Many 802.11 standards work in the 5 GHz_____. A) licensed spectrum B) unlicensed spectrum C) licensed service band D) unlicensed service band
unlicensed service band
In 802.1x initial authentication mode, the authenticator is the ________. A) wireless client B) wireless access point C) authentication server D) none of the above
wireless access point
Compared to wired transmission, propagation problems in radio transmissions are ________. A) worse B) about as bad C) better
worse
In unlicensed bands, ________. A) you can use radios wherever you please B) you can prevent nearby businesses from setting up access points in the same channel C) both A and B D) neither A nor B
you can use radios wherever you please
In Zigbee, ad hoc networking's mesh is operated by ________. A) Zigbee Controllers B) Zigbee End Devices C) Zigbee Routers D) Zigbee Hives
Zigbee Routers
Bluetooth LE normally uses ________ for power. A) a coin battery B) wall power C) both A and B D) neither A nor B
a coin battery
When two devices communicate using NFC, how close must they be? A) a few inches B) up to 5 feet C) up to 10 feet D) up to 50 feet
a few inches
If a signal has a strength of 100 mW at 10 meters, how strong will it be at 100 meters? A) about 10 mW B) about 1 mW C) about 0.1 D) none of the above
about 0.1
If the signal strength from an omnidirectional radio source is 100 mW at 10 meters, how strong will it be at 30 meters, ignoring absorptive attenuation? A) about 30 mW B) about 11 mW C) about 4 mW D) about 0.1 mW
about 11 mW
If a signal has a strength of 100 mW at 10 meters, how strong will it be at 40 meters? A) about 0.5 mW B) about 5 mW C) about 25 mW D) about 6 mW
about 6mW
Bluetooth LE ________. A) uses about 0.1 to 0.5 watts B) assumes that transmissions will be infrequent C) has terse connection openings D) all of the above
all of the above
Which of the following is usually set up by a hacker outside the building? A) a rogue access point B) an evil twin access point C) both A and B D) neither A nor B
an evil twin access point
Because of ________, an 802.11AX access point can communicate with an 802.11AY client. A) MIMO B) MU-MIMO C) backward compatibility D) They CANNOT communicate.
backward compatibility
In Bluetooth LE, ________ provide information. A) advertisements B) beacons C) both A and B D) neither A nor B
beacons
802.11 operates in the ________ unlicensed service band. A) 2.4 MHz B) 60 MHz C) both A and B D) neither A nor B
both A and B
802.11i provides ________. A) confidentiality B) message integrity C) both A and B D) neither A nor B
both A and B
As your wireless client travels away from an access point, ________. A) errors begin to increase B) your transmission speed decreases C) both A and B D) neither A nor B
both A and B
Beamforming can allow an access point to ________. A) focus power on individual clients B) send signals to two different clients at the same time C) both A and B D) neither A nor B
both A and B
Classic Bluetooth provides transmission speeds of ________. A) 3 Mbps B) 24 Mbps C) both A and B D) neither A nor B
both A and B
Individual throughput for users of an access point ________. A) depends on how many users are sharing the access point B) depends on your distance from the access point C) both A and B D) neither A nor B
both A and B
Media access control governs transmission by ________. A) access points B) wireless hosts C) both A and B D) neither A nor B
both A and B
Which of the following is a risk in 802.11i PSK mode? A) Unauthorized sharing of the pre-shared key. B) A weak passphrase may be selected. C) both A and B D) neither A nor B
both A and B
A security might use SNMP Set commands to ________. A) change an access point's power B) collect information to look for a rogue access point C) both A and B D) neither A nor B
change an access point's power
An FM radio station is called Moldy Oldies 101.1. The 101.1 refers to its ________. A) single frequency B) channel C) service band D) none of the above
channel
To handle multiple conversations in 802.11 transmission, you normally use multiple ________. A) channels B) frequencies C) service bands D) wires
channels
If you want to transmit 7 times as fast in radio, you need to use ________. A) channels that are about 7 times as wide B) channels that are about 49 times as wide C) spread spectrum transmission D) none of the above
channels that are about 7 times as wide
A security might use SNMP Get commands to ________. A) change an access point's power B) collect information to look for a rogue access point C) both A and B D) neither A nor B
collect information to look for a rogue access point
Bluetooth Low Energy ________. A) provides much higher speed than other IoT transmission standards B) provides energy to power the other device C) does not require batteries D) conserves battery power
conserves battery power
802.11i 802.1X initial authentication mode was created for ________. A) corporations with multiple access points B) residences with a single access point C) residences with less than eight access points D) corporations with less than eight access points
corporations with multiple access points
Wider channel bandwidth ________. A) increases transmission speed B) allows more channels to be used in a service band C) both A and B D) neither A nor B
increases transmission speed
Two access points that operate on the same channel will ________. A) bond B) coordinate their use of the channel C) interfere D) divide the available spectrum about equally
interfere
The downside of unlicensed bands is potential ________ A) speed loss B) loss of flexibility C) interference from others D) less-developed standards
interference from others
Selecting locations for access points first involves ________. A) laying out circles of a chosen diameter in a diagram of the building B) doing a wireless site survey C) selecting locations that reflect organizational units D) all of the above
laying out circles of a chosen diameter in a diagram of the building
The protection of communication between a wireless client and the access point is ________. A) link security B) end-to-end security C) both A and B D) neither A nor B
link security
IoT transmissions usually involve ________. A) high transmission speeds B) low transmission distances C) both A and B D) neither A nor B
low transmission distances
The state of security in IoT transmission standards is ________. A) strong B) weak C) mixed D) flawless
mixed
Companies prefer the 5 GHz band because there is ________ than in the 2.5 GHz band. A) more bandwidth B) less absorptive attenuation C) both A and B D) neither A nor B
more bandwidth
Spread spectrum transmission is used in WLANs for ________. A) higher transmission speed B) more reliable transmission C) greater security D) more efficient transmission
more reliable transmission
The 60 GHz unlicensed service band offers ________ compared to lower-frequency service bands. A) more speed per channel B) greater propagation distance C) greater ability to penetrate walls D) all of the above
more speed per channel
What propagation problem is especially bad in moist air? A) absorptive attenuation B) electromagnetic interference C) multipath interference D) inverse square law attenuation
absorptive attenuation
If another wireless device is near, but in an unknown direction, it is better to use ________. A) an omnidirectional antenna B) a dish antenna C) neither A nor B
an omnidirectional antenna
MIMO ________. A) increases transmission speed B) increases transmission distance C) both A and B D) neither A nor B
both A and B
Site surveys should be done ________. A) after the initial provisional placement of access points B) periodically afterwards C) both A and B D) neither A nor B
both A and B
The term "broadband" is commonly used for ________. A) wide radio bandwidths B) high-speed transmission in general C) both A and B D) neither A nor B
both A and B
What initial authentication mode does 802.11i use? A) 802.1X B) PSK C) both A and B D) neither A nor B
both A and B
The most serious problem with wireless transmission in WLANs is ________. A) inverse square law attenuation B) absorptive attenuation C) shadow zones D) multipath interference
multipath interference
Frequency is measured in terms of ________. A) nanometers B) hertz C) microns D) microseconds
hertz
For a game joystick, you would use the ________ Bluetooth profile. A) basic printing B) SYNCH C) human interface device D) mouse
human interface device
MIMO ________. A) increases throughput B) lowers propagation distance C) both A and B D) neither A nor B
increases throughput
Wi-Fi direct ________ uses access points. A) always B) usually C) rarely D) never
never
A lamp in a Zigbee network would probably be a ________. A) client B) server C) router D) none of the above
none of the above
In 802.1x initial authentication mode, the VERIFIER is the ________. A) wireless client B) wireless access point C) authentication server D) none of the above
none of the above
Passive RFID chips get the power needed to transmit from ________. A) wall power B) coin batteries C) the electricity that always flows through the air in small quantities D) none of the above
none of the above
The ________ standard dominates IoT transmission today. A) Bluetooth B) Zigbee C) Wi-Fi direct D) none of the above
none of the above
Which initial authentication mode is used for message-by-message encryption, authentication, and message integrity? A) 802.1X B) PSK C) both A and B D) neither A nor B
neither A nor B
An 8/1 increase in power corresponds to approximately ________ decibels. A) 3 B) 6 C) 20 D) none of the above
none of the above
In Wi-Fi, 2.4 GHz and 5 GHz refer to ________. A) frequency spectrums B) broadbands C) channels D) none of the above.
none of the above
WLANs normally use ________. A) licensed bands B) unlicensed bands C) both A and B D) neither A or B
unlicensed bands
When does it make sense to use RTS/CTS? A) when all devices can hear each other B) when not all of the devices can hear each other C) when efficiency is crucial D) always
when not all of the devices can hear each other
To transmit very rapidly in radio, you need ________. A) single-frequency transmission B) single-mode transmission C) wide bandwidth D) narrow bandwidth
wide bandwidth
The set of frequencies used for police communication in a city are ________. A) channels B) frequencies C) spectrums D) none of the above
none of the above
What is the bandwidth of a channel that extends from 55 MHz to 60 MHz? A) 60 MHz B) 55 MHz C) 65 MHz D) none of the above
none of the above
Which is the correct formula for decibels? A) 10 * P2/P1 B) 10 * (P2/P1)2 C) Log10(P2/P1) D) none of the above
none of the above
A wireless host sends a packet to a server on the company's wired Ethernet LAN via an access point. How many frames will be involved in this one-way transmission? A) 1 B) 2 C) 4 D) There will be one frame for each switch along the way.
2
A change in power from 2 mW to 205 mW corresponds to approximately ________ decibels. A) 3 B) 9 C) 10 D) 20
20
In VPNs designed to frustrate evil twin attacks, the shared secret between the client and the server is ________. A) transmitted in the clear B) transmitted with cryptographic protections C) not transmitted D) any of the above
not transmitted
Wi-Fi normally uses a(n) ________. A) omnidirectional antenna B) dish antenna C) both A and B D) neither A nor B
omnidirectional antenna
Bluetooth uses ________ operation. A) all-to-all B) point-to-multipoint C) one-to-all D) one-to-one
one-to-one
If a master has multiple slaves, Bluetooth will use ________ operation. A) all-to-all B) point-to-multipoint C) one-to-all D) one-to-one
one-to-one