Test Bank for Guide to Wireless Communications 4th Edition by Olenewa A+

$35.00
Test Bank for Guide to Wireless Communications 4th Edition by Olenewa A+

Test Bank for Guide to Wireless Communications 4th Edition by Olenewa A+

$35.00
Test Bank for Guide to Wireless Communications 4th Edition by Olenewa A+

True / False

  1. A VoIP phone allows you to make calls over the Internet.
  2. True
  3. False

ANSWER: True

  1. A WLAN is an extension of a wide area network.
  2. True
  3. False

ANSWER: False

  1. UWBWiGighasa range of up to 100 meters at 7 Gbps.
  2. True
  3. False

ANSWER: False

  1. TheZigBeeAllianceprotocolsenabledeviceslikelightswitchestocommunicatewithoneanother.
  2. True
  3. False

ANSWER: True

  1. RFIDtechnologyisimplementedbyroadsideassistanceservicestolinka vehicle and driver to a central service center that may be miles away.
  2. True
  3. False

ANSWER: False

  1. 4Gtechnologyuses100%analogtransmissionforvoiceanddata.
  2. True
  3. False

ANSWER: False

  1. AnAPconnectswirelessdevicestothewiredLAN.
  2. True
  3. False

ANSWER: True

  1. DSLisanInternetaccesstechnologythatusescableTVlinestomakea network connection.
  2. True
  3. False

ANSWER: False

  1. ThejobmarketforwirelessLANprofessionalsissaturatedandlikelytodeclineincomingyears.
  2. True
  3. False

ANSWER: False

  1. Oneadvantageofwirelesstechnologyisthatitisimmunetointerferencesources.
  2. True
  3. False

ANSWER: False

Multiple Choice

  1. Whattypeofdeviceisbuiltintoa tablet computer and can send data over radio waves to another device such as a laser printer?
  2. VoIPphone
  3. wirelessNIC
  4. accesspoint
  5. EthernetNIC

ANSWER: b

  1. HowcanVoIPoverWi-Fihelpsavemoney?
  2. byeliminatingtheneedfora phone
  3. bysavingoncellularphonebills
  4. byreducingthecostofa smartphone
  5. bynotrequiringanaccesspoint

ANSWER: b

  1. WhichRFIDcomponentpowersthechipinthetag?
  2. RFIDinterrogator
  3. RFID inactivetag
  4. Keyfob
  5. NFCemitter

ANSWER: a

  1. WhatisthetypicalrangefortheuseofBluetooth?
  2. meters tokilometers
  3. yards tomiles
  4. inches tofeet
  5. millimeters toinches

ANSWER: c

  1. Withwhattechnologywillyoufindradiomodulesandlinkmanagers?
  2. RFID
  3. GPS
  4. Wi-Fi
  5. Bluetooth

ANSWER: d

  1. Whichtechnologyhasa maximum range of about 2 meters when transmitting high quality audio and video wirelessly at up to 7 Gbps?
  2. Wi-Fi
  3. Bluetooth
  4. WiGig
  5. RFID

ANSWER: c

  1. Automaticconnectionsbetweenwhattypeofdevicescreatea piconet?
  2. VoIP
  3. Infrared
  4. Bluetooth
  5. WirelessHD

ANSWER: c

  1. Inwhattypeofwirelesscommunicationdevicewillyoufinda repeater?
  2. satellite
  3. NFC
  4. antenna
  5. WNIC

ANSWER: a

  1. Whatkindofnetworkisbuiltaroundtheconceptoflow-powertransmittersbuiltontowersthatcanusethesame radio frequencychannel?
  2. Wi-Fi 802.11networks
  3. cellular telephonenetworks
  4. UWB A/Vnetworks
  5. GPS trackingnetworks

ANSWER: b

  1. Whattypeofcellularnetworkuses100percentdigitaltransmissionforvoiceanddataandcanreachratesover 100 Mbps?
  2. CDMA
  3. 4G
  4. 3G
  5. GSM

ANSWER: b

  1. Whatkindofdevicedoesa WLAN use to facilitate communication between wireless computers?
  2. Ethernetswitch
  3. GPShub
  4. accesspoint
  5. cellstation

ANSWER: c

  1. Whichwirelesstechnologyhasa typical transfer rate of 1 Mbps to 3 Mbps at distances up to about 10 meters?
  2. ZigBee
  3. NFC
  4. Wi-Fi
  5. Bluetooth

ANSWER: d

  1. Whichtechnologyisintendedtoworkata distance of about 5 to 10 centimeters with transmission speeds of 250 Kbps?
  2. ZigBee
  3. NFC
  4. RFID
  5. Bluetooth

ANSWER: b

  1. Whichcommunicationtechnologyshouldyouuseifyouneedtoconnectthreeofficeswhichareallwithin3 miles of each other at speeds up to 75 Mbps using antennas?
  2. T1
  3. DSL
  4. WiMax
  5. ISDN

ANSWER: c

  1. Whichcellulartechnologyhastheoreticaldownstreamspeedsof1 Gbps and upstream speeds of 500 Mbps?
  2. LTEAdvanced
  3. SiriusXM
  4. MDT

d. 802.16

ANSWER: a

  1. Whattermreferstothecombiningofvoice,videoandtext-processingandaccesstomultiplenetworkplatforms from a single device?
  2. accessaggregation
  3. digitallandscape
  4. digitalconvergence
  5. networktransparency

ANSWER: c

  1. Whattechnologyallowssmartphonestousesoftwarethatallowsthemtomakephonecallsovera wireless LAN instead of the cellular network?
  2. VLAN
  3. WiMAx
  4. ZigBee
  5. VoIP

ANSWER: d

  1. Whatarethesmall,low-powertransceiversusedbyBluetoothcalled?
  2. RFIDtags
  3. antennas
  4. radiomodules
  5. NFCtransmitters

ANSWER: c

  1. WhatfunctionisRFIDlikelytoreplaceforthepurposeofinventorymanagement?
  2. NFC tags
  3. APs
  4. barcodes
  5. interrogators

ANSWER: c

  1. Whywouldyouwanttoencryptwirelessdata?
  2. protectprivacy
  3. preventjamming
  4. facilitateaccess
  5. reduce healthrisks

ANSWER: a

Matching

Match each item with a statement below.

  1. 3G
  2. Bluetooth
  3. DSL
  4. 4g
  5. link manager
  6. NFC
  7. T1
  8. USB
  9. WiGig
  10. ZigBee
    1. a digital cellular technology that can send data at up to 21 Mbps over the cellular network

ANSWER: a

  1. a wireless standard that enables devices to transmit data at an effective rate of 721.2 Kbps over short distances of up to 33 feet

ANSWER: b

  1. a technology used to transmit data at high speeds over a telephone line

ANSWER: c

  1. a cellular technology that can transmit and receive data at speeds over over 100 Mbps

ANSWER: d

  1. softwareinBluetoothdevicesthathelpsidentifyotherBluetoothdevices

ANSWER: e

  1. a technology that can be used to configure and activate a connection between two devices over Bluetooth or Wi-Fi

ANSWER: f

  1. a wired technology used to transmit data over telephone lines at 1.544 Mbps

ANSWER: g

  1. a common way of connecting peripherals such as flash drives to a computer

ANSWER: h

  1. a specification for connecting computers, communication, and entertainment devices over short ranges

ANSWER: i

  1. a specification used for home automation that can wirelessly control lighting, as well as security and energy systems

ANSWER: j

Subjective Short Answer

  1. Whatarethepotentialhealthrisksofusingwirelessdevices?

ANSWER: Wireless devices contain radio transmitters and receivers that emit radio frequency (RF) energy.

Typically, these wireless devices emit low levels of RF energy while being used. Scientists know that high levels of RF can produce biological damage through heating effects (this is how a microwave oven is able to cook food). However, it is not known if lower levels of RF can cause adverse health effects. Although some research has been done to address these questions, no clear picture of the biological effects of this type of radiation has been found to date.

  1. Describehowwirelessnetworkingcanenhancea family's convenience in the kitchen.

ANSWER: A computer system installed in the refrigerator door lets you share a family schedule, make shopping lists, as well as exchange information through text messages or email with your computers, smartphones, and tablets. Because the refrigerator is also connected to the Internet through your Wi-Fi network, you can access this information even when you are not at home.

  1. DescribeBluetoothtechnologyandhowitcanbeusedina computing environment.

ANSWER: Bluetooth is a wireless standard designed to transmit data at very short ranges-typically, from a few inches to 33 feet (10 meters). The main purpose of short-range technologies such as Bluetooth is to eliminate cables between devices such as smartphones and computers, which allows data to be transmitted wirelessly between, say, a computer and a printer or a mobile telephone and a music player or a computer and a smartphone.

  1. DescribeWiGigandhowitmightbeusedinthehome.

ANSWER: WiGig is another short-range wireless technology designed for use primarily in the home; it can transmit larger quantities of data at much higher speeds. WiGig can send and receive CD- and DVD-quality audio and video as well as Blu-ray high-definition movies from entertainment equipment, computers, or mobile devices to a TV, for example

  1. What is a piconet?

ANSWER: A piconet consists of two or more Bluetooth devices that are exchanging data with each other. Up to seven devices can belong to a single Bluetooth WPAN.

  1. Whatdoesa repeater do in a satellite communication system?

ANSWER: In satellite communications, a device called a repeater is located in the satellite itself. An Earth station transmits to the satellite at one frequency band, and the satellite regenerates and transmits (repeats) the signal back to Earth on a different frequency. The transmission time needed to repeat a signal from one Earth station to another can be up to 250 milliseconds.

  1. How does a WLAN use an access point?

ANSWER: A WLAN is an extension of a wired LAN. Wireless devices connect to it through a wireless access point (wireless AP or just AP). The AP relays data signals between all the devices on the wired network, including file servers, printers, and even other access points and the wireless devices connected to the AP itself.

  1. Describea WMAN and discuss a technology a WMAN might use.

ANSWER: A WMAN link can cover an area of about 25 square miles (40 square kilometers), and it can be used to carry data, voice, and video signals. Some WMANs today are based on the IEEE 802.16 (WiMAX) fixed broadband wireless standard and use radio waves for data communications.

  1. Whatisdigitalconvergenceandhowmightitaffecthowpeopleusenetworkdevices?

ANSWER: Digital convergence refers to the power of digital devices-such as desk and laptop computers and wireless handhelds like smartphones-to combine voice, video, and text-processing capabilities as well as to be connected to business and home networks and to the Internet. The same concept applies to the development of VoIP networks, which use the same protocols and media (both wired and wireless) that once carried only data to carry two-way voice conversations. Wireless networks in general play an important part in digital convergence as users demand to be connected to their data and voice networks at all times, wherever they may be.

  1. Discusshowradiosignalinterferencecanaffectwirelessdevices.

ANSWER: Because wireless devices operate using radio signals, the potential for two signals to interfere with each other exists. Virtually any wireless device can be a source of interference for other devices. Several common office devices emit signals that may interfere with the receivers in a WLAN. These devices include microwave ovens, elevator motors, and other heavy electrical equipment, such as manufacturing machines, photocopiers, certain types of outdoor lighting systems, theft protection systems, and cordless telephones. These may cause errors to occur

in the transmission between a wireless device and an access point. In addition, Bluetooth, WLAN 802.11b/g/n, and ZigBee devices can all operate in the same radio frequency, potentially resulting in interference between such devices in spite of efforts to design these radios to automatically avoid interference.

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