Quiz-6 - QUIZ PDF

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Business Data Networks and Security, 11e (Panko) Chapter 6 Wireless LANS I 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 Answer: A Difficulty: Basic Question: 1a Objective: Describe basic Wi-Fi technology and access points. AACSB: Applying Information Technology, Application of Knowledge 2) ________ is a wireless network standard. A) OSI B) TCP/IP C) both A and B D) neither A nor B Answer: A Difficulty: Basic Question: 1b Objective: Describe basic Wi-Fi technology and access points. AACSB: Applying Information Technology, Application of Knowledge 3) Wi-Fi Standards come from the ________ Working Group. A) 802.1 B) 802.3 C) 802.11 D) 802.1X Answer: C Difficulty: Basic Question: 2a Objective: Describe basic Wi-Fi technology and access points. AACSB: Applying Information Technology, Application of Knowledge 4) Wi-Fi is a term used by the ________. A) IEEE B) Wi-Fi Alliance C) both A and B D) neither A nor B Answer: B Difficulty: Deeper Question: 2b Objective: Describe basic Wi-Fi technology and access points. AACSB: Applying Information Technology

5) We use the terms Wi-Fi and ________ interchangeably in this book. A) 802.1 B) 802.3 C) 802.11 D) 802.1X Answer: C Difficulty: Basic Question: 2c Objective: Describe basic Wi-Fi technology and access points. AACSB: Applying Information Technology 6) In a Wi-Fi LAN, wireless hosts generally send frames directly to one another. Answer: FALSE Difficulty: Basic Question: 3a Objective: Describe basic Wi-Fi technology and access points. AACSB: Applying Information Technology 7) Wireless access points typically link wireless clients to ________. A) wireless servers B) servers on the wired network C) both A and B Answer: B Difficulty: Deeper Question: 3b Objective: Describe basic Wi-Fi technology and access points. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge 8) Compared to wired transmission, propagation problems in radio transmissions are ________. A) worse B) about as bad C) better Answer: A Difficulty: Basic Question: 4a Objective: Describe physical layer radio transmission. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge

9) 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 Answer: A Difficulty: Deeper Question: 4b Objective: Describe physical layer radio transmission. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge 10) Wireless radio transmission speed is usually measured in terms of ________. A) wavelength B) frequency C) amplitude D) dollars Answer: B Difficulty: Basic Question: 5b Objective: Describe physical layer radio transmission. AACSB: Applying Information Technology 11) Frequency is measured in terms of ________. A) nanometers B) hertz C) microns D) microseconds Answer: B Difficulty: Basic Question: 5c Objective: Describe physical layer radio transmission. AACSB: Applying Information Technology 12) Most wireless systems operate in the ________ range. A) hz B) kHz C) MHz D) GHz Answer: D Difficulty: Basic Question: 5d Objective: Describe physical layer radio transmission. AACSB: Applying Information Technology

13) 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 Answer: A Difficulty: Basic Question: 6a Objective: Describe physical layer radio transmission. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge 14) Wi-Fi normally uses a(n) ________. A) omnidirectional antenna B) dish antenna C) both A and B D) neither A nor B Answer: A Difficulty: Basic Question: 6d Objective: Describe physical layer radio transmission. AACSB: Applying Information Technology 15) 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 Answer: D Difficulty: Deeper Question: 7a Objective: Describe physical layer radio transmission. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge 16) 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 Answer: C Difficulty: Deeper Question: 7b Objective: Describe physical layer radio transmission. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge

17) 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 Answer: B Difficulty: Deeper Question: 7e Objective: Describe physical layer radio transmission. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge 18) What propagation problem is especially bad in moist air? A) absorptive attenuation B) electromagnetic interference C) multipath interference D) inverse square law attenuation Answer: A Difficulty: Deeper Question: 8a Objective: Describe physical layer radio transmission. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge 19) 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 Answer: B Difficulty: Basic Question: 8b Objective: Describe physical layer radio transmission. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge 20) The most serious problem with wireless transmission in WLANs is ________. A) inverse square law attenuation B) absorptive attenuation C) shadow zones D) multipath interference Answer: D Difficulty: Deeper Question: 8c Objective: Describe physical layer radio transmission. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge

21) Multipath interference is mitigated through ________. A) broadband transmission B) MIMO C) beamforming D) spread spectrum transmission Answer: D Difficulty: Basic Question: 8d Objective: Describe physical layer radio transmission. AACSB: Applying Information Technology, Analytical Thinking 22) 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 Answer: D Difficulty: Deeper Question: 8e Objective: Describe physical layer radio transmission. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge 23) The frequency spectrum extends ________. A) into the gigahertz range B) into the visible light range C) into the ultraviolet range D) to infinity Answer: D Difficulty: Basic Question: 9a Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology 24) In Wi-Fi, 2.4 GHz and 5 GHz refer to ________. A) frequency spectrums B) broadbands C) channels D) none of the above. Answer: D Difficulty: Deeper Question: 9a Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge

25) To handle multiple conversations in 802.11 transmission, you normally use multiple ________. A) channels B) frequencies C) service bands D) wires Answer: A Difficulty: Basic Question: 9b Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Application of Knowledge 26) The set of frequencies used for police communication in a city are ________. A) channels B) frequencies C) spectrums D) none of the above Answer: D Difficulty: Deeper Question: 9d Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge 27) 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 Answer: B Difficulty: Deeper Question: 9e Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge 28) Wi-Fi operates in the 2.4GHz and 5GHz ________. A) frequencies B) spectrums C) channels D) service bands Answer: D Difficulty: Basic Question: 9f Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Application of Knowledge 29) 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 Answer: B Difficulty: Deeper Question: 10a Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology 30) 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 Answer: D Difficulty: Basic Question: 10b Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge 31) 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 Answer: A Difficulty: Basic Question: 10c Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge 32) To transmit very rapidly in radio, you need ________. A) single-frequency transmission B) single-mode transmission C) wide bandwidth D) narrow bandwidth Answer: C Difficulty: Basic Question: 10d Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Application of Knowledge

33) To transmit data very rapidly, you would want a ________ channel. A) narrowband B) broadband C) single-frequency band D) single-mode Answer: B Difficulty: Basic Question: 10d Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge 34) Channels with wide bandwidths are called ________ channels. A) multimode B) full-duplex C) broadband D) parallel Answer: C Difficulty: Basic Question: 10e Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology 35) 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 Answer: C Difficulty: Deeper Question: 10f Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Application of Knowledge 36) WLANs a use ________. A) licensed bands B) unlicensed bands C) both A and B D) neither A or B Answer: B Difficulty: Medium Question: 11a Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology

37) Many 802.11 standards work in the 5 GHz_____. A) licensed spectrum B) unlicensed spectrum C) licensed service band D) unlicensed service band Answer: D Difficulty: Medium Question: 11a Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge 38) Wi-Fi standards use unlicensed bands for ________ A) greater speed B) greater standardization C) greater flexibility D) greater privacy Answer: C Difficulty: Basic Question: 11b Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge 39) 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 Answer: A Difficulty: Deeper Question: 11b Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Application of Knowledge 40) The downside of unlicensed bands is potential ________ A) speed loss B) loss of flexibility C) interference from others D) less-developed standards Answer: C Difficulty: Deeper Question: 11c Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Application of Knowledge

41) 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 Answer: C Difficulty: Deeper Question: 12 Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Application of Knowledge 42) 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 Answer: C Difficulty: Basic Question: 13a Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Application of Knowledge 43) The 2.4 GHz band supports ________ possible non-overlapping 20 MHz channel(s). A) 1 B) 3 C) 7 D) 11 Answer: B Difficulty: Basic Question: 13b Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology 44) 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 Answer: A Difficulty: Deeper Question: 13c Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Analytical Thinking

45) 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 Answer: A Difficulty: Basic Question: 13d Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Application of Knowledge 46) 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. Answer: C Difficulty: Deeper Question: 13e Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge 47) 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 Answer: A Difficulty: Basic Question: 14a Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Application of Knowledge 48) Spread spectrum transmission is used in WLANs for ________. A) higher transmission speed B) more reliable transmission C) greater security D) more efficient transmission Answer: B Difficulty: Deeper Question: 14b Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Application of Knowledge

49) Spread spectrum transmission's wider channels brings ________. A) greater speed B) greater reliability C) greater security D) none of the above Answer: B Difficulty: Basic Question: 14d Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology, Application of Knowledge 50) Which of the following uses OFDM? A) 802.11ac B) 802.11n C) both A and B D) neither A nor B Answer: C Difficulty: Basic Question: 15a Objective: Explain the frequency spectrum, service bands and channels. AACSB: Applying Information Technology 51) 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 Answer: A Difficulty: Deeper Question: 16a Objective: Describe 802.11 Wi-Fi operation with access points. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge 52) 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. Answer: B Difficulty: Deeper Question: 16b Objective: Describe 802.11 Wi-Fi operation with access points. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge

53) 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 Answer: A Difficulty: Basic Question: 17a Objective: Describe 802.11 Wi-Fi operation with access points. AACSB: Applying Information Technology 54) 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 Answer: B Difficulty: Basic Question: 17a Objective: Describe 802.11 Wi-Fi operation with access points. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge 55) ________ have SSIDs. A) Wireless clients B) Wireless access points C) both A and B D) neither A nor B Answer: B Difficulty: Basic Question: 17b Objective: Describe 802.11 Wi-Fi operation with access points. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge 56) To use an access point, you need to know its ________. A) SSID B) BSSID C) ESSID D) Wi-Fi ID Answer: A Difficulty: Basic Question: 17b Objective: Describe 802.11 Wi-Fi operation with access points. AACSB: Applying Information Technology

57) Access points in the same ESS communicate via ________. A) wireless transmission B) the distribution system C) a master access point D) routers Answer: B Difficulty: Deeper Question: 17c Objective: Describe 802.11 Wi-Fi operation with access points. AACSB: Applying Information Technology, Application of Knowledge 58) 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 Answer: A Difficulty: Basic Question: 17d Objective: Describe 802.11 Wi-Fi operation with access points. AACSB: Applying Information Technology 59) To connect to an access point, you must know its ________. A) SSID B) ESSID C) IP address D) Wi-Fi ID Answer: A Difficulty: Basic Question: 17d Objective: Describe 802.11 Wi-Fi operation with access points. AACSB: Applying Information Technology 60) 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 Answer: A Difficulty: Basic Question: 18a Objective: Describe 802.11 Wi-Fi operation with access points. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge

61) ________ 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 Answer: D Difficulty: Basic Question: 18b Objective: Describe 802.11 Wi-Fi operation with access points. AACSB: Applying Information Technology 62) Media access control governs transmission by ________. A) access points B) wireless hosts C) both A and B D) neither A nor B Answer: C Difficulty: Basic Question: 18c Objective: Describe 802.11 Wi-Fi operation with access points. AACSB: Applying Information Technology, Analytical Thinking, Application of Knowledge 63) Within a BSS (and without MU-MIMO), the access point and a wireless host it serves can transmit at the same time. Answer: FALSE Difficulty: Basic Question: 18d Objective: Describe 802.11 Wi-Fi operation with access points. AACSB: Applying Information Technology, Analytical Thinking 64) In CSMA/CA, CS means ________. A) cancel sending B) counter-source C) carriage suspension D...