Wireless

Quiz by Rachel Hirsch

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14 questions
• Q1
Which statement about the 802.11a standard is true?
The 802.11a standard uses the 400MHz spectrum.
The 802.11a standard uses the 5GHz spectrum.
The 802.11a standard uses the 2.4GHz spectrum.
The 802.11a standard can use both the 2.4GHz and 5GHz spectrum.
30s
• Q2
What is the function of Orthogonal Frequency Division Multiplexing (OFDM)?
It uses time slots to divvy up throughput to subscribers on the same wireless network.
It uses a technique that divides data into chips and transmits each chip using a different frequency.
It uses a technique that switches a carrier through many frequency channels.
it uses a technique that divides a 20MHz channel into 52 subcarriers which, in turn, transmit multiple frequencies simultaneously.
30s
• Q3
In which standard was Multiple Input and Multiple Output (MIMO) introduced?
802.11ac
802.11b
802.11n
802.11g
30s
• Q4
What is the maximum data rate of 802.11n?
600 Mbps
300 Mbps
54 Mbps
288 Mbps
30s
• Q5
Which statement is true regarding MIMO and 802.11ac?
The 802.11ac standard is capable of utilizing up to 4 spatial streams. Each stream is broadcast utilizing differing channel widths.
The 802.11ac standard is capable of utilizing up to 8 spatial streams. If all 8 spatial streams are utilized with peak channel bonding, it can theoretically provide a data rate of 6.98GBps.
The 802.11ac standard is only capable of utilizing 3 spatial streams. Each stream requires its own individual antenna, which is why most devices have 3 antennas.
The 802.11ac standard is capable of utilizing 2 spatial streams. One is designated as input and the other is designated as output.
30s
• Q6
Which statement describes TDMA?
TDMA uses code multiplexing techniques to separate the utilization of throughput given to separate subscribers.
TDMA uses time slots to allocate throughput for subscribers, putting each time slot on a different frequency to ensure they are secure.
TDMA utilizes separate frequencies for each subscriber so that each subscriber has a dedicated frequency and throughput.
TDMA utilizes throughput on a single frequency and separates it into time slots to allocate throughput for subscribers. Each subscriber is given a separate time slot to send and receive data.
30s
• Q7
If there are no restrictions, how many channels are available in the 2.4GHz spectrum?
13
12
11
14
30s
• Q8
Which frequency spectrum offers the most non-overlapping channels at a channel width of 20MHz?
2.4GHz
5GHz
2400MHz
3.6 GHz
30s
• Q9
Which of the following is a reason to use the 2.4GHz wireless spectrum over the 5.0GHz wireless spectrum?
The 2.4GHz spectrum offers the capability of higher throughput over the 5GHz spectrum.
The 2.4GHz spectrum offers more available channels to utilize over the 5GHz spectrum.
The 2.4GHz spectrum ensures less chance of interference from other devices in the spectrum.
The 2.4GHz spectrum provides a stronger, more resilient signal better suited for longer distances or obstructions.
30s
• Q10
What technique does Multi-User Multiple Input Multiple Output (MU-MIMO) use to extend signal coverage and strength?
SOHO
Bidirectional
Trans-placement
Beamforming
30s
• Q11
Which of the following terms defines the wireless practice of adding additional antennas to an AP to provide additional spatial streams?
IBSS
MIMO
Channel Bonding
CSMA/CD
30s
• Q12
What is a Yagi antenna?
A unidirectional antenna with a bar and fins.
An omnidirectional antenna with a bar and fins.
An omnidirectional antenna shaped like a dish or grid.
A unidirectional antenna shaped like a dish or grid.
30s
• Q13
What type of antenna sends a signal in all directions?
Unidirectional
Omnidirectional
Log periodic
Parabolic
30s
• Q14
Which tool would be very valuable to assist with performing a site survey for a wireless implementation?
Packet sniffers
Heat map
WEP cracking tool
Cable crimpers
30s

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