Chapter 6 Test 2 -- Chapter 7 test 2
1) Wireless network standards operate at ________. A) the data link layer B) the Internet layer C) both A and B D) neither A nor B
A
10) In what mode of 802.11i operation is a central authentication server used? A) 802.1X mode B) PSK mode C) both A and B D) neither A nor B
A
11) A cellular telephone uses a(n) ________. A) omnidirectional antenna B) dish antenna C) both A and B D) neither A nor B
A
13) What propagation problem is especially bad in moist air? A) absorptive attenuation B) electromagnetic interference C) multipath interference D) inverse square law attenuation
A
2) Wireless LAN standards come from ________. A) OSI B) TCP/IP C) both A and B D) neither A nor B
A
2) Wireless network standards are ________ standards. A) OSI B) TCP/IP C) both A and B
A
21) The Wi-Fi Alliance calls 802.1X mode ________ mode. A) enterprise B) personal C) WEP D) WPA
A
25) A rogue access point is created by ________. A) an employee B) an external attacker C) the IT security department D) an evil twin
A
27) Companies are moving to 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
A
29) 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
A
32) 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
A
35) Access points take ________ from wireless devices and send them on to devices on the wired LAN. They also do the converse. A) packets B) frames C) both A and B D) neither A nor B
A
37) 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
A
39) To use an access point, you need to know its ________. A) SSID B) BSSID C) ESSID D) Wi-Fi ID
A
4) Breaking into WLANs from outside the premises is ________. A) drive-by hacking B) war driving
A
40) To connect to an access point, you must know its ________. A) SSID B) EUI-48 address C) IP address D) Wi-Fi ID
A
41) I wish to have a wireless LAN to serve my house. I will use ________. A) 802.11 B) Bluetooth C) either A or B
A
42) In an extended service set, each access point ________. A) must have the same SSID B) must have different SSIDs C) must have coordinated SSIDs D) none of the above
A
44) The standard for roaming among access points is ________. A) 802.11r B) 802.11s C) 802.11W D) the wireless handoff protocol
A
45) What happens if two nearby access points use the same channel? A) They will interfere with each other. B) They will be bonded for joint operation automatically. C) They will be bonded for joint operation automatically if they are on the same ESS. D) They will be bonded for joint operation automatically if they have the same SSID.
A
45) Which form of Bluetooth has a typical transmission speed of less than 3 Mbps? A) classic Bluetooth B) high-speed Bluetooth C) personal Bluetooth D) none of the above
A
46) 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
A
47) Which of the following can use access points? A) 802.11 B) Bluetooth C) both A and B D) neither A nor B
A
53) CSMA/CA+ACK usually is ________. A) mandatory B) optional C) not important D) efficient
A
54) Which of the following is more efficient and faster? A) CSMA/CA+ACK B) RTS/CTS C) Both are about equally efficient and fast.
A
55) Which of the following is the newest Wi-Fi standard? A) 802.11ac B) 802.11g C) 802.11n D) 802.11b
A
55) Which of the following uses an access point? A) traditional Wi-Fi B) Wi-Fi Direct C) both A and B D) neither A nor B
A
57) 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
A
6) Compared to wired transmission, propagation problems in radio transmission are ________. A) worse B) about as bad C) better
A
6) In 802.11i, protection is provided between the client and the ________. A) access point B) switch C) router D) server
A
62) MIMO ________. A) increases throughput B) lowers propagation distance C) both A and B D) neither A nor B
A
10) The other wireless device is far away in a known direction. It would be better to use ________. A) an omnidirectional antenna B) a dish antenna C) neither A nor B
B
11) In 802.11i ________, hosts must know a shared initial key. A) 802.1X mode B) PSK mode C) both A and B D) neither A nor B
B
12) After authentication in 80.11i PSK mode, a wireless client communicates with the access point via a(n) ________ key. A) VPN B) session C) 802.1X D) preshared
B
14) What propagation problem becomes worse as there is a large and dense object between sender and receiver? A) multipath interference B) shadow zones or dead zones C) both A and B D) neither A nor B
B
20) If a firm has many access points, it should use ________ mode in 802.11i. A) PSK B) 802.1X C) IPsec D) PEAP
B
20) 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
B
23) 802.1X requires security between the supplicant and the authenticator in ________. A) Ethernet B) 802.11 C) both A and B D) neither A nor B
B
24) An unauthorized internal access point is a(n) ________ access point. A) evil twin B) rogue C) shadow D) counterfeit
B
24) To transmit data very rapidly, you would want a ________ channel. A) narrowband B) broadband C) single-frequency band D) none of the above
B
28) 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
B
29) 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) 16
B
3) To drive around a city looking for working access points that are unprotected is ________. A) drive-by hacking B) war driving
B
30) Spread spectrum transmission is used in WLANs for ________. A) higher transmission speed B) more reliable transmission C) greater security D) more efficient transmission
B
30) 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) PEAP D) 802.1X mode
B
31) WLANs normally use ________. A) licensed bands B) unlicensed bands C) both A and B D) neither A or B
B
32) Centralized access point management ________. A) increases management costs but provides better control B) reduces management costs
B
36) 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.
B
38) ________ have SSIDs. A) Wireless clients B) Wireless access points C) both A and B D) neither A nor B
B
43) Access points in the same ESS communicate via ________. A) wireless transmission B) the distribution system C) a master access point D) routers
B
43) Which of the following was created for PANs? A) 802.11 B) Bluetooth C) both A and B D) neither A nor B
B
46) Which form of Bluetooth has a typical transmission speed of about 24 Mbps? A) classic Bluetooth B) high-speed Bluetooth C) enterprise Bluetooth D) none of the above
B
49) At the beginning of a telephone call placed through a Bluetooth headset with the Hands-Free Profile, which device is initially the master? A) the Bluetooth phone B) the Bluetooth headset C) Both are simultaneously masters and slaves.
B
5) Wireless access points typically link wireless clients to ________. A) wireless servers B) servers on the wired network C) both A and B
B
50) CSMA/CD+ACK is ________. A) unreliable B) reliable C) semireliable
B
52) The 802.11 standard has two mechanisms for media access control. One of two mechanisms is mandatoryit is ________. A) MAC B) CSMA/CA+ACK C) RTS/CTS D) CSMA/CD
B
58) Which of the following only operates in the 5 GHz band? A) 802.11b B) 802.11ac C) 802.11g D) 802.11n
B
60) In the 5 GHz band, how many channels can you have with 802.11ac with 80 GHz channels? A) 1 B) 6 C) 12 D) 24
B
7) Wireless radio transmission speed is usually measured in terms of ________. A) wavelength B) frequency C) amplitude D) wetness
B
8) Which offers stronger security? A) WPA B) 802.11i C) Both A and B offer equally strong security.
B
1) In the TJX breach, attackers first got into the network through ________. A) spear phishing B) an inside conspirator C) the use of weak wireless encryption D) all of the above
C
17) In 802.11i PSK mode, the pass phrase should be at least ________ characters long. A) 8 B) 12 C) 20 D) 128
C
18) Part of WPS weakness is caused by ________. A) 802.1X mode B) WPA2 preshared key mode C) dividing the 8 digit PIN into two 4 digit halves D) IPsec
C
22) In ________, the authenticator is the ________. A) 802.1X, wireless access point B) 802.11i, switch C) 802.11i, wireless access point D) 802.1X, central authentication server
C
22) To transmit very rapidly in RADIO, you need ________. A) single-frequency transmission B) single-mode transmission C) wide bandwidth D) narrow bandwidth
C
23) Channels with wide bandwidths are called ________ channels. A) multimode B) full-duplex C) broadband D) parallel
C
25) 802.11 standards are being developed to work in the ________ unlicensed band. A) 2.4 GHz B) 5 GHz C) both A and B D) neither A nor B
C
3) Wi-Fi Standards come from the ________ Working Group. A) 802.1 B) 802.3 C) 802.11 D) 802.1X
C
31) In VPNs designed to frustrate evil twin attacks, the shared secret ________. A) is transmitted in the clear B) is transmitted with cryptographic protections C) is not transmitted D) Any of the above.
C
33) A channel has more bandwidth than is necessary given data transmission speeds requirements in ________ transmission. A) normal radio B) reliable commercial C) spread spectrum D) licensed
C
33) Managed access points should ________. A) allow access point power to be adjusted remotely B) provide constant transmission quality monitoring C) both A and B D) neither A nor B
C
34) Managed access points should ________. A) identify rogue access points B) be able to push updates out to access points C) both A and B D) neither A nor B
C
34) Which of the following uses OFDM? A) 802.11ac B) 802.11n C) both A and B D) neither A nor B
C
37) A power ratio of 8/1 decrease in power corresponds to approximately ________ decibels. A) 3 B) 6 C) 9 D) none of the above
C
38) A 100/1 increase in power corresponds to approximately ________ decibels. A) 6 B) 10 C) 20 D) none of the above
C
39) 1 Watt represents a dBm value of about ________. A) 10 B) 20 C) 30 D) We cannot say because only one power is given.
C
40) A radio that has a power of 8 mW represents a ratio of about ________ dBm. A) 2 B) 8 C) 9 D) 10
C
41) An extended service set (ESS) is a group of BSSs that ________. A) are connected to the same distribution system B) have the same SSID C) both A and B D) neither A nor B
C
44) Bluetooth is standardized by the ________. A) 802.11 Working Group B) Wi-Fi Alliance C) Bluetooth Special Interest Group D) none of the above
C
48) Media access control governs transmission by ________. A) access points B) wireless hosts C) both A and B D) neither A nor B
C
49) 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
C
5) 802.11i provides ________. A) confidentiality B) message integrity C) both A and B D) neither A nor B
C
50) Which Bluetooth profile would a desktop use with a Bluetooth keyboard? A) Bluetooth input profile B) Bluetooth I/O profile C) human interface device profile D) none of the above
C
51) Near-field communication has a maximum transmission distance of about ________. A) 400 cm/200 in B) 40 cm/20 in C) 4 cm/2 in D) The devices must be physically touching.
C
59) In 802.11g, channel bandwidth usually is ________. A) 20 GHz B) 40 GHz C) 20 MHz D) 40 MHz
C
63) Beamforming can allow an access point to ________. A) direct power to individual clients B) send signals to two different clients at the same time C) both A and B D) neither A nor B
C
7) Which 802 working group created 802.11i? A) 802.1 B) 802.3 C) 802.11 D) It was not an 802 working group. It was the Wi-Fi Alliance
C
12) At 10 meters, a signal has a strength of 100 mW. About 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
D
13) 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) WPS keys D) different session keys
D
14) For post-authentication communication with an access point, the client in 802.11i PSK mode will ________ for subsequent communication. A) always use the same preshared key each time it is connected B) always use the same session key each time it is connected C) both A and B D) neither A nor B
D
15) The most serious problem with wireless transmission in WLANs is ________. A) inverse square law attenuation B) absorptive attenuation C) shadow zones D) multipath interference
D
16) 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
D
16) Which of the following is a risk in 802.11i PSK mode? A) WPS can easily be cracked if it is used. B) Unauthorized sharing of the pre-shared key. C) A weak passphrase may be selected. D) all of the above
D
17) The frequency spectrum extends ________. A) into the gigahertz range B) into the visible light range C) into the ultraviolet range D) to infinity
D
18) 2.4 GHz and 5 GHz are ________. A) frequency spectrums B) broadbands C) channels D) service bands
D
19) Which of the following has a dangerous vulnerability that is causing problems today? A) PEAP B) 802.11i C) WPA D) WPS
D
21) A channel extends from 55 MHz to 60 MHz. Its bandwidth is ________. A) 60 MHz B) 55 MHz C) 65 MHz D) none of the above
D
26) A rogue access point ________. A) is an unauthorized internal access point B) often has very poor security C) often operates at high power D) All of the above are true.
D
28) The 5 GHz band usually supports about ________ non-overlapping 20 MHz channel(s). A) 1 B) 3 C) 7 D) 12
D
35) 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
D
36) An 8/1 increase in power corresponds to approximately ________ decibels. A) 3 B) 6 C) 20 D) none of the above
D
48) In Bluetooth, a master can have up to ________ slaves at any moment. A) 1 B) 3 C) 12 D) none of the above
D
51) 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
D
52) In which frequency band does NFC operate? A) 2.4 GHz B) 5 GHz C) both A and B D) neither A nor B
D
53) Passive RFID chips are powered by ________. A) a battery B) the sun C) body temperature D) none of the above
D
54) Passive RFID chips are powered by ________. A) a battery B) the sun C) body temperature D) the scanning unit
D
56) Today, Wi-Fi sales are dominated by ________. A) 802.11a B) 802.11g C) 802.11n D) 802.11ac
D
61) 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
D
15) Session keys are used to ________. A) make cryptanalysis more difficult B) improve authentication C) both A and B D) neither A nor B
A
19) To handle multiple conversations in radio transmission, you normally use multiple ________. A) channels B) frequencies C) service bands D) wires
A
27) A notebook computer configured to act like a real access point is a(n) ________. A) evil twin access point B) rogue access point
A
9) What is the strongest security protocol for 802.11 today? A) 802.11i B) 802.11s C) 802.11X D) WPA
A
26) The 2.4 GHz band supports ________ possible non-overlapping 20 MHz channel(s). A) 1 B) 3 C) 7 D) 11
B
42) Bluetooth is for ________. A) large WLANs B) cable replacement C) both A and B D) neither A nor B
B
8) Frequency is measured in terms of ________. A) nanometers B) hertz C) microns D) microseconds
B
4) We use the terms Wi-Fi and ________ interchangeably in this book. A) 802.1 B) 802.3 C) 802.11 D) 802.1X
C
9) Radio transmission is measured in terms of ________. A) bytes per second B) wavelength C) frequency D) bits per second
C
47) ________ is a technique for preventing two wireless stations from transmitting at the same time and therefore interfering with each other. A) Creating extended service sets B) Roaming C) The distribution system D) Media access control
D
