Question 1

Which type of device can you use to detect RF interference?&#10;A) protocol analyzer&#10;B) packet sniffer&#10;C) spectrum analyzer&#10;D) UTP analyzer

Accepted Answer

A spectrum analyzer is the best choice for detecting RF interference, as it is specifically designed to analyze and display RF signals across a range of frequencies. Protocol analyzers, packet sniffers, and UTP analyzers are more focused on analyzing network traffic, rather than RF signals.

Question 2

Whenever possible,a wireless device should be set to disable its wireless function when it connects to a wired network.

Accepted Answer

Disabling the wireless function on a device when it connects to a wired network can help improve security and reduce the risk of unauthorized access or interference. It also helps optimize network performance by reducing the number of devices using the wireless connection. Therefore, it is recommended to set wireless devices to disable their wireless function when connecting to a wired network whenever possible.

Question 3

When one wireless device of close proximity to the AP drowns out the signal of another device,this problem is referred to as which of the following?&#10;A) near/far&#10;B) hidden node&#10;C) cochannel interference&#10;D) colocation inhibition

Accepted Answer

The near/far problem occurs when two wireless devices are in close proximity to an access point (AP), and one device sends a signal that is strong enough to drown out the signal of the other device. This can occur because the AP may be far away from one device and close to another, causing the AP to receive a stronger signal from the closer device and ignoring the weaker signal from the farther device. This problem can be addressed by adjusting power levels or using directional antennas. The other options, B) hidden node, C) cochannel interference, and D) colocation inhibition, refer to other types of wireless interference but do not specifically address the near/far problem.

Question 4

The system operating margin is the difference between the received signal level and that which is required.

Accepted Answer

The system operating margin is calculated as the difference between the received signal level and the minimum required signal level for a satisfactory system performance.

Question 5

The time difference of the arrival of signals as copies travel along different paths is referred to as which of the following?&#10;A) system operating margin&#10;B) return loss&#10;C) multipath&#10;D) delay spread

Accepted Answer

The time difference of the arrival of signals as copies travel along different paths is referred to as delay spread. Choice A (system operating margin) refers to how much extra capacity a system has beyond what is required for normal operation. Choice B (return loss) refers to the amount of power that is reflected back from a signal transmission. Choice C (multipath) refers to the phenomenon of a signal arriving at a receiver through multiple paths, which can cause interference and signal degradation.

Question 6

Which of the following is NOT part of the process a Windows wireless client performs when scanning for wireless networks?&#10;A) wireless adapter sends a series of probe requests&#10;B) APs respond with a Beacon frame&#10;C) IP address is requested&#10;D) scan occurs about every 60 seconds

Accepted Answer

When scanning for wireless networks, a Windows wireless client does not request an IP address. Rather, it sends a series of probe requests and receives Beacon frames from Access Points (APs) in the area. These Beacon frames contain information about the network, such as the SSID, channel, and security settings. The client may also perform Active Scanning by sending probe requests to specific SSIDs. This scanning process typically occurs about every 60 seconds, depending on the client's settings.

Question 7

EMI is strictly a man-made electronic disturbance.

Accepted Answer

EMI, or Electromagnetic Interference, can be caused by both man-made sources, such as electrical equipment and machinery, and natural phenomena, such as lightning and solar flares.

Question 8

The noise floor indicates the strongest signal that can be received.

Accepted Answer

The noise floor is the level of background noise or interference present in the signal environment. It is the weakest signal that can be detected above the noise level. The sensitivity of the receiver determines the weakest signal that can be received, not the noise floor.

Question 9

In a wireless environment,a station might be in the range of an AP but not in the range of all other stations.

Accepted Answer

This is true. In wireless networks, the range of an Access Point (AP) is typically much larger than the range of a typical station, which means that some stations may be too far away from each other to communicate directly, even if they are in range of the AP. This is known as the "hidden node problem" and can be addressed through various techniques such as carrier sense multiple access with collision avoidance (CSMA/CA) and Request to Send/Clear to Send (RTS/CTS) protocols.

Question 10

What is a possible solution to cochannel interference?&#10;A) change to a different channel&#10;B) use a codirectional antenna&#10;C) use a MIMO antenna&#10;D) increase the power on your AP

Accepted Answer

Changing to a different channel is the most effective solution to cochannel interference as it allows for a clear frequency to be used without interference from other networks operating on the same channel.

Question 11

To ensure smooth roaming between coverage areas,which of the following must be true?&#10;A) APs must use the same SSID and channel number&#10;B) APs must use the same SSID and security settings&#10;C) No cell overlap must be present&#10;D) Channel and security settings must be different but SSID must be the same

Accepted Answer

The answer of To ensure smooth roaming between coverage areas,which...

Question 12

This type of interference can affect the entire 2.4 GHz band.&#10;A) wideband&#10;B) longband&#10;C) multiband&#10;D) narrowband

Accepted Answer

The answer of This type of interference can affect the...

Question 13

What happens when an RF signal moves through mediums of different densities?&#10;A) it slows down&#10;B) it bends&#10;C) it speeds up&#10;D) it scrambles

Accepted Answer

The answer of What happens when an RF signal moves...

Question 14

Which type of interference is generated by television,radio,and satellite transmitters?&#10;A) longband interference&#10;B) wideband interference&#10;C) multiband interference&#10;D) narrowband interference

Accepted Answer

The answer of Which type of interference is generated by...

Question 15

One way to reduce ISI for outdoor settings is to use which type of antenna?&#10;A) omnidirectional&#10;B) unidirectional&#10;C) highly-directional&#10;D) multidirectional

Accepted Answer

The answer of One way to reduce ISI for outdoor...

Question 16

What should you do when you have several wireless devices,all with different power levels,and one or more of the devices are having difficulty communicating?&#10;A) increase the APs power level&#10;B) match the AP power level with the lowest-powered device&#10;C) employ multiple APs&#10;D) shut down the highest powered devices

Accepted Answer

The answer of What should you do when you have...

Question 17

When considering an outdoor network without obstructions,what do you need to keep in mind?&#10;A) radio signals attenuate with the square of the distance&#10;B) doubling the range requires double the power&#10;C) antennas should be installed low to the ground&#10;D) the SOM should be at least 25 dB

Accepted Answer

The answer of When considering an outdoor network without obstructions,what...

Question 18

Which of the following is a possible problem when a wireless device intermittently disconnects from the AP?&#10;A) duplicate SSID&#10;B) mismatched preshared key&#10;C) MAC address is being filtered&#10;D) disabled wireless adapter

Accepted Answer

The answer of Which of the following is a possible...

Question 19

Which of the following is NOT a solution to the hidden node problem?&#10;A) move the hidden node device&#10;B) increase the client device's power&#10;C) add another AP to the WLAN&#10;D) increase the AP's power

Accepted Answer

The answer of Which of the following is NOT a...

Question 20

Choose the correct order of events of the Windows WLAN connection process?
1.Authenticate
2.Obtain an IP address
3.Scan for wireless networks
4.Choose an AP
5.Associate
a.5,3,2,1,4
b.3,4,1,5,2
c.3,4,5,2,1
d.4,3,1,5,2

Accepted Answer

The answer of Choose the correct order of events of...

Question 21

Which is true about wireless AP and device optimization?&#10;A) using autonomous APs reduces TCO&#10;B) always use picocell APs for large coverage areas&#10;C) conservative roaming setting should be used for VoWiFi devices&#10;D) devices should be set to maintain their wireless connection even when connected to a wired network

Accepted Answer

The answer of Which is true about wireless AP and...

Question 22

Describe intersymbol interference.

Accepted Answer

The answer of Describe intersymbol interference....

Question 23

What are three ways to resolve a hidden node problem?

Accepted Answer

The answer of What are three ways to resolve a...

Question 24

How can modifying power levels mitigate all-band interference problems?

Accepted Answer

The answer of How can modifying power levels mitigate all-band...

Question 25

Describe the issue of duplicate SSIDs and why this may cause a wireless device to intermittently disconnect from the AP.

Accepted Answer

The answer of Describe the issue of duplicate SSIDs and...

Question 26

Describe the noise floor.

Accepted Answer

The answer of Describe the noise floor....

Question 27

When scanning,the wireless network adapter sends a series of ____________________ frames and the APs within range respond with a Beacon frame that contains the capabilities of the wireless AP,such as the supported speeds,SSID,and security options.

Accepted Answer

The answer of When scanning,the wireless network adapter sends a...

Question 28

Which of the following are proposed solutions to the interference caused by competing technologies that use FHSS to hop across the spectrum? (Choose all that apply.)&#10;A) change the RF spectrum used&#10;B) add switching software&#10;C) change the Network layer&#10;D) modify power levels

Accepted Answer

The answer of Which of the following are proposed solutions...

Question 29

What are four factors that influence system throughput?

Accepted Answer

The answer of What are four factors that influence system...

Question 30

When a wireless device running Windows attempts to connect to the WLAN it goes through a five-step process.List the steps in this process.

Accepted Answer

The answer of When a wireless device running Windows attempts...

Question 31

Which of the following are categories of external noise interference on a WLAN? (Choose all that apply.)&#10;A) multiband interference&#10;B) narrowband interference&#10;C) weather interference&#10;D) longband interference

Accepted Answer

The answer of Which of the following are categories of...

Question 32

How would you solve a near/far transmission problem?

Accepted Answer

The answer of How would you solve a near/far transmission...

Question 33

One of the main sources of WLAN problems is ____________ interference.

Accepted Answer

The answer of One of the main sources of WLAN...

Question 34

The _________ floor indicates the weakest signal that can be received.

Accepted Answer

The answer of The _________ floor indicates the weakest signal...

Question 35

Explain why the statement &#34;The network seems to be working OK so there must not be any RF interference.&#34; might be considered a wireless 'myth'.

Accepted Answer

The answer of Explain why the statement &#34;The network seems...

Question 36

Which of the following are factors to consider when troubleshooting slow throughput? (Choose all that apply.)&#10;A) distance from the AP&#10;B) number of users&#10;C) type of interference&#10;D) network layer protocol

Accepted Answer

The answer of Which of the following are factors to...

Question 37

If a wireless device is not connecting with the AP,what are the first two things you should check? (Choose two.)&#10;A) wireless device and AP are configured for the same subnet&#10;B) matching SSID&#10;C) excessive collisions&#10;D) security settings

Accepted Answer

The answer of If a wireless device is not connecting...

Question 38

If the wireless device is configured for DHCP yet no DHCP server is active,then Windows assigns a(n)____________________ IP Addressing address that begins with the IP range 169.254.x.x.

Accepted Answer

The answer of If the wireless device is configured for...

Question 39

Competing technologies that use FHSS can create ______________ interference.

Accepted Answer

The answer of Competing technologies that use FHSS can create...

Question 40

What is cochannel interference?

Accepted Answer

The answer of What is cochannel interference?...

Question 41

Match between columns&#10;                        Premises: RF interference that affects the entire frequency band,such as the entire 2.4-GHz band&#10;RF interference that affects the entire frequency band,such as the entire 2.4-GHz band&#10;RF interference that affects the entire frequency band,such as the entire 2.4-GHz band&#10;RF interference that affects the entire frequency band,such as the entire 2.4-GHz band&#10;RF interference that affects the entire frequency band,such as the entire 2.4-GHz band&#10;RF interference that affects the entire frequency band,such as the entire 2.4-GHz band&#10;RF interference that affects the entire frequency band,such as the entire 2.4-GHz band&#10;RF interference that affects the entire frequency band,such as the entire 2.4-GHz band&#10;RF interference that affects the entire frequency band,such as the entire 2.4-GHz band&#10;RF interference that affects the entire frequency band,such as the entire 2.4-GHz band&#10;transmission problem involving two wireless devices,in which the wireless device closest to the AP transmits at a higher power than the other,more distant device,thereby overwhelming the weaker signal from the distant device&#10;transmission problem involving two wireless devices,in which the wireless device closest to the AP transmits at a higher power than the other,more distant device,thereby overwhelming the weaker signal from the distant device&#10;transmission problem involving two wireless devices,in which the wireless device closest to the AP transmits at a higher power than the other,more distant device,thereby overwhelming the weaker signal from the distant device&#10;transmission problem involving two wireless devices,in which the wireless device closest to the AP transmits at a higher power than the other,more distant device,thereby overwhelming the weaker signal from the distant device&#10;transmission problem involving two wireless devices,in which the wireless device closest to the AP transmits at a higher power than the other,more distant device,thereby overwhelming the weaker signal from the distant device&#10;transmission problem involving two wireless devices,in which the wireless device closest to the AP transmits at a higher power than the other,more distant device,thereby overwhelming the weaker signal from the distant device&#10;transmission problem involving two wireless devices,in which the wireless device closest to the AP transmits at a higher power than the other,more distant device,thereby overwhelming the weaker signal from the distant device&#10;transmission problem involving two wireless devices,in which the wireless device closest to the AP transmits at a higher power than the other,more distant device,thereby overwhelming the weaker signal from the distant device&#10;transmission problem involving two wireless devices,in which the wireless device closest to the AP transmits at a higher power than the other,more distant device,thereby overwhelming the weaker signal from the distant device&#10;transmission problem involving two wireless devices,in which the wireless device closest to the AP transmits at a higher power than the other,more distant device,thereby overwhelming the weaker signal from the distant device&#10;any undesirable electrical energy emitted within the frequency range dedicated to RF transmissions&#10;any undesirable electrical energy emitted within the frequency range dedicated to RF transmissions&#10;any undesirable electrical energy emitted within the frequency range dedicated to RF transmissions&#10;any undesirable electrical energy emitted within the frequency range dedicated to RF transmissions&#10;any undesirable electrical energy emitted within the frequency range dedicated to RF transmissions&#10;any undesirable electrical energy emitted within the frequency range dedicated to RF transmissions&#10;any undesirable electrical energy emitted within the frequency range dedicated to RF transmissions&#10;any undesirable electrical energy emitted within the frequency range dedicated to RF transmissions&#10;any undesirable electrical energy emitted within the frequency range dedicated to RF transmissions&#10;any undesirable electrical energy emitted within the frequency range dedicated to RF transmissions&#10;an undesirable electronic disturbance,either manmade or natural,which causes an undesirable degrading in the performance of electrical equipment&#10;an undesirable electronic disturbance,either manmade or natural,which causes an undesirable degrading in the performance of electrical equipment&#10;an undesirable electronic disturbance,either manmade or natural,which causes an undesirable degrading in the performance of electrical equipment&#10;an undesirable electronic disturbance,either manmade or natural,which causes an undesirable degrading in the performance of electrical equipment&#10;an undesirable electronic disturbance,either manmade or natural,which causes an undesirable degrading in the performance of electrical equipment&#10;an undesirable electronic disturbance,either manmade or natural,which causes an undesirable degrading in the performance of electrical equipment&#10;an undesirable electronic disturbance,either manmade or natural,which causes an undesirable degrading in the performance of electrical equipment&#10;an undesirable electronic disturbance,either manmade or natural,which causes an undesirable degrading in the performance of electrical equipment&#10;an undesirable electronic disturbance,either manmade or natural,which causes an undesirable degrading in the performance of electrical equipment&#10;an undesirable electronic disturbance,either manmade or natural,which causes an undesirable degrading in the performance of electrical equipment&#10;a WLAN that uses a reduced power output from the AP; results in a smaller coverage area but can allow for increased performance due to channel reuse&#10;a WLAN that uses a reduced power output from the AP; results in a smaller coverage area but can allow for increased performance due to channel reuse&#10;a WLAN that uses a reduced power output from the AP; results in a smaller coverage area but can allow for increased performance due to channel reuse&#10;a WLAN that uses a reduced power output from the AP; results in a smaller coverage area but can allow for increased performance due to channel reuse&#10;a WLAN that uses a reduced power output from the AP; results in a smaller coverage area but can allow for increased performance due to channel reuse&#10;a WLAN that uses a reduced power output from the AP; results in a smaller coverage area but can allow for increased performance due to channel reuse&#10;a WLAN that uses a reduced power output from the AP; results in a smaller coverage area but can allow for increased performance due to channel reuse&#10;a WLAN that uses a reduced power output from the AP; results in a smaller coverage area but can allow for increased performance due to channel reuse&#10;a WLAN that uses a reduced power output from the AP; results in a smaller coverage area but can allow for increased performance due to channel reuse&#10;a WLAN that uses a reduced power output from the AP; results in a smaller coverage area but can allow for increased performance due to channel reuse&#10;an IP address that begins with the IP range 169.254.x.x and is assigned if a device cannot receive a valid IP&#10;an IP address that begins with the IP range 169.254.x.x and is assigned if a device cannot receive a valid IP&#10;an IP address that begins with the IP range 169.254.x.x and is assigned if a device cannot receive a valid IP&#10;an IP address that begins with the IP range 169.254.x.x and is assigned if a device cannot receive a valid IP&#10;an IP address that begins with the IP range 169.254.x.x and is assigned if a device cannot receive a valid IP&#10;an IP address that begins with the IP range 169.254.x.x and is assigned if a device cannot receive a valid IP&#10;an IP address that begins with the IP range 169.254.x.x and is assigned if a device cannot receive a valid IP&#10;an IP address that begins with the IP range 169.254.x.x and is assigned if a device cannot receive a valid IP&#10;an IP address that begins with the IP range 169.254.x.x and is assigned if a device cannot receive a valid IP&#10;an IP address that begins with the IP range 169.254.x.x and is assigned if a device cannot receive a valid IP&#10;the area between two APs in which a wireless device begins to search for a new AP with which to associate&#10;the area between two APs in which a wireless device begins to search for a new AP with which to associate&#10;the area between two APs in which a wireless device begins to search for a new AP with which to associate&#10;the area between two APs in which a wireless device begins to search for a new AP with which to associate&#10;the area between two APs in which a wireless device begins to search for a new AP with which to associate&#10;the area between two APs in which a wireless device begins to search for a new AP with which to associate&#10;the area between two APs in which a wireless device begins to search for a new AP with which to associate&#10;the area between two APs in which a wireless device begins to search for a new AP with which to associate&#10;the area between two APs in which a wireless device begins to search for a new AP with which to associate&#10;the area between two APs in which a wireless device begins to search for a new AP with which to associate&#10;wireless networks that are used in areas in which large numbers of device are clustered close together&#10;wireless networks that are used in areas in which large numbers of device are clustered close together&#10;wireless networks that are used in areas in which large numbers of device are clustered close together&#10;wireless networks that are used in areas in which large numbers of device are clustered close together&#10;wireless networks that are used in areas in which large numbers of device are clustered close together&#10;wireless networks that are used in areas in which large numbers of device are clustered close together&#10;wireless networks that are used in areas in which large numbers of device are clustered close together&#10;wireless networks that are used in areas in which large numbers of device are clustered close together&#10;wireless networks that are used in areas in which large numbers of device are clustered close together&#10;wireless networks that are used in areas in which large numbers of device are clustered close together&#10;RF interference that covers all bands of the RF spectrum&#10;RF interference that covers all bands of the RF spectrum&#10;RF interference that covers all bands of the RF spectrum&#10;RF interference that covers all bands of the RF spectrum&#10;RF interference that covers all bands of the RF spectrum&#10;RF interference that covers all bands of the RF spectrum&#10;RF interference that covers all bands of the RF spectrum&#10;RF interference that covers all bands of the RF spectrum&#10;RF interference that covers all bands of the RF spectrum&#10;RF interference that covers all bands of the RF spectrum&#10;RF interference that is usually generated by television,radio,and satellite transmitters&#10;RF interference that is usually generated by television,radio,and satellite transmitters&#10;RF interference that is usually generated by television,radio,and satellite transmitters&#10;RF interference that is usually generated by television,radio,and satellite transmitters&#10;RF interference that is usually generated by television,radio,and satellite transmitters&#10;RF interference that is usually generated by television,radio,and satellite transmitters&#10;RF interference that is usually generated by television,radio,and satellite transmitters&#10;RF interference that is usually generated by television,radio,and satellite transmitters&#10;RF interference that is usually generated by television,radio,and satellite transmitters&#10;RF interference that is usually generated by television,radio,and satellite transmitters

Accepted Answer

The Answer of wideband interference and RFI and picocell and is...

Deck 12: Wireless Network Troubleshooting and Optimization