CIN 3103 Wireless Networks FinalExam Review-NoDpNoShAns-v2
The convergence sublayers in the WiMAX MAC protocol allow it to support ______.
(T1, ATM, voice&video) all of the above
What type of security is provided for in the ZigBee specification?
(encryption, MIC, short-range communications, ACLs) All of the above
If a low-pass filter is set at 2200 MHz, which of the following signals would be allowed to pass through?
1000 MHz
Over short distances, WiMAX can communicate at speeds of up to ____ in the 10-66 GHz bands.
120 Mbps
The new fourth generation (4G) cellular technology will allow data to be transmitted at a maximum speed of __________ Mbps.
150 Mbps
The highest data rate for an 802.11 RF WLAN is about ______ Mbps.
2
What is the maximum data-transmission rate for ZigBee?
250 Kbps
What type of cellular network uses 100 percent digital transmission for voice and data and can reach rates up to 150 Mbps?
4G
The maximum distance for a local multipoint distribution service (LMDS) network is ______ miles.
5
IEEE 802.11n devices can be as far as 375 feet apart and can send and receive data at up to ________ million bits per second (Mbps).
600
The IEEE _____ standard defines a local area network that provides cable-free data access at a rate of up to 2 Mbps for clients that are either mobile or in a fixed location
802.11
Which of the following best describes Guard Interval?
A certain amount of delay is required at the end of every frame to allow all reflected signals to arrive at the receivers.
Which type of radio signal is most susceptible from interference sources such as lightning?
AM
What kind of device does a WLAN use to facilitate communication between wireless computers?
Access point
Which of the following is NOT true about infrared light?
All infrared signals are invisible
Which type of device is considered active device because it adds power to a signal?
Amplifier
Documenting the network in detail can help the task of _________.
Assessing the current network
Objects in the path of a radio signal can cause which of the following?
Attenuation
Which of the following is a type of RF filter?
Bandpass
The technique that treats the entire transmission medium as if it were only one channel is called _____.
Baseband
Automatic connections between what type of devices create a piconet?
Bluetooth
The term "fixed wireless" is generally used to refer to _____.
Buildings
Which multiple access method uses a spreading code?
CDMA
Which of the following is NOT a type of modulation that can be applied to an analog signal?
Carrier
The method used in 802.11 to implement CSMA/CA is based on ______.
DCF
The IEEE 802.11b standard that outlines the specifications for RF WLANs is based on _____.
DSSS
Which radio transmission method uses a chipping code?
DSSS
Which of the following is a good application for an infrared wireless system?
Data transfer between laptop and camera
What term refers to the combining of voice, video and text-processing and access to multiple network platforms from a single device?
Digital convergence
Which of the following is a spread spectrum technique that employs mathematical algorithms to recover lost data bits?
Direct sequence
Which of the following is NOT a common component of all radio systems?
Emitter
Which of the following transmits a signal in an infrared device?
Emitter
Which of the following would take a transmission band of 1000 Hz and divide it into 100 channels of 10 Hz each to accommodate multiple access?
FDMA
What system, sometimes called fiberless optical, uses low-powered infrared beams instead of fiber-optic cable?
FSO
4G technology uses 100% analog transmission for voice and data.
False
Hopping codes used in FHSS transmissions are configured on the base station by the network administrator.
False
Infrared light interferes with radio signals but is not affected by radio signals.
False
One advantage of wireless technology is that it is immune to interference sources.
False
RFID technology is implemented by roadside assistance services to link a vehicle and driver to a central service center.
False
Spread-spectrum signals are more susceptible to outside interference than narrow-band transmissions.
False
VoIP phones can carry analog data over the Internet.
False
The lower levels of the WPAN protocol stack are implemented in the _____.
Hardware
The banking industry requires networks that have a ________ degree of security.
High
A single WiMAX base station can communicate with _____ of subscriber stations simultaneously.
Hundreds
What is the unit of measurement for radio frequency?
Hz
Which frequency band(s) can ZigBee networks utilize?
ISM
Which best describes an analog signal?
Intensity varies and is continuous
What can take place when signal strength falls close to or below the level of noise?
Interference
What is the role of an antenna on a wireless device?
It transmits and receives data
Because all the IEEE WLAN features are isolated in the PHY and _____ layers, any network operating system or LAN application will run on a WLAN without any modification.
MAC
What process must occur to transmit a digital signal over an analog medium?
Modulation
Which of the following is an advantage of analogue modulation over digital modulation?
Modulation techniques are simpler
What is the term for signals that get reflected and travel different paths between transmitter and receiver arrive out of phase?
Multipath distortion
What problem can a directional antenna reduce in severity?
Multipath distortion
What type of wireless communication device does not require a repeater? Choose all that apply.
NFC & Antenna
Where would you most likely find RFID tags around the house?
On product packages
The automatic connection between various Bluetooth devices creates a network called a(n) ___________.
Piconet
At the lowest level of the Bluetooth protocol stack is the ______ layer.
RF
A(n) _________ seeks to gain information about what vendors may have to offer.
RFI
A determination of a project's cost in relationship to its benefits is known as an _____.
ROI
A _________ cost is one that continues to be paid over an extended period of time.
Recurring
A help desk can provide service to users by performing all of the following tasks except ________.
Reporting users' questions to their supervisors
In what type of wireless communication device will you find a repeater?
Satellite
What type of transmission is a broadcast radio station an example of?
Simplex
Which of the following statements does not apply to infrared wireless systems?
Someone can eavesdrop from another room
A leased special high-speed connection from the local telephone carrier for business users that transmits at 1.544 Mbps is called _____.
T1
Which multiple access method overcomes the problem of crosstalk and divides the transmission time into several slots?
TDMA
The frequency of a wave is best defined as which of the following?
The number of times a cycle occurs within one second
Which of the following best describes bandwidth in an analog system?
The range of frequencies that can be transmitted by a system
Which of the following is a feature of WPAN devices?
They are small and can operate on batteries
Which of the following is true about wireless radio signal transmissions?
They travel at the speed of light
An AP connects wireless devices to the wired LAN.
True
The ZigBee Alliance protocols enable devices like light switches to communicate with one another.
True
The height of a radio wave is called the amplitude of the wave.
True
Why is it a mistake to turn the entire planning process over to external consultants?
Users and the IT staff may not be involved, which might antagonize them.
A wireless NIC performs the same functions as a wired NIC except that it_____.
Uses an antenna instead of a wired connection
Which of the following best describes MIMO (Multiple Input and Multiple Output) Technology?
Uses multiple radios, both transmitters and receivers, as well as multiple antennas.
_________ provides a standard way to transmit, format, and display Internet data on cellular phones.
WAP2
The distance between a point in one wave cycle and the same point in the next wave cycle is called which of the following?
Wavelength
__________ uses wireless transmissions for data communications as much as 35 miles apart
WiMAX
Which communication technology should you use if you need to connect three offices which are all within 3 miles of each other at speeds up to 75 Mbps using antennas?
WiMax
What type of device is built into a tablet computer and can send data over radio waves to another device such as a laser printer?
Wireless NIC
A request for proposal (RFP) should include _________.
a description of the current network and applications
A Bluetooth channel consists of _____________.
a hopping sequence including up to 79 frequencies
What key factor outlines how WiMAX maximizes the use of the frequency bands?
adaptive modulation
An 802.11 wireless NIC, when configured to communicate with a wired network, sends its signals through invisible radio waves to ____________.
an access point
Which type of switching is used in a telephone system?
circuit switching
Using VoWLAN instead of a traditional business telephone system means that the company has ________.
cordless IP phones
The Physical Layer Convergence Procedure (PLCP) standards for 802.11b are based only on _____ spread spectrum.
direct sequence
The _________ period is when ZigBee devices have time reserved for priority transmissions.
guaranteed time slot
IEEE 802.11 operates in ______ mode, and each frame must be acknowledged.
half-duplex
Which of the following is not an example of a Bluetooth communication?
hard drive to memory
What is the common name for connections that begin at a service provider, go through the local neighborhood, and end at the home or office?
last mile
Each Bluetooth device uses a ____________, which is special software that helps identify other Bluetooth devices.
link manager
If customers can see data about themselves on the business's computer system, it will enable them to _______.
make better and more informed decisions
WiMAX network coverage is typically measured in ________.
miles or kilometers
Some vendors have already integrated the components of a wireless NIC directly onto the notebook's _____.
motherboard's chipset
Bluetooth devices communicate using small radio transceivers called ___________ that are built onto microprocessor chips.
radio modules
If the AP does not send the SSID of the WLAN in the beacon, client devices can still obtain the SSID by _______.
sending a probe frame
Which of the following is not a function of an AP?
serves as a router
Which of the following is not a feature of Bluetooth?
slave authenticates master
When a business decides to deploy 802.11 wireless technology, it may face problems because ________.
there is a shortage of qualified staff to deploy and support it
Of the items below, which one is an important advantage of wireless technology?
universal access to corporate data
A ___________ should be performed either by the company or by a vendor submitting a proposal for implementation of a WLAN.
wireless site survey
