Wireless Site Survey

Question 1

A predictive survey is good to identify rogues, locate RF trouble zones quickly, validate final RF setting and
perform initial survey? True/False

Answer 1

True

Question 2

An active survey is associated with an AP and includes rate shifting data rates as the RF condition changes performs retransmission’s and gathers RF information such as RSSI, SNR, actual data rate, roaming performance and measure application performance? True/False

Answer 2

True

Question 3

A predictive site survey is performed when the deployment environment has not yet been built or to obtain a budgetary environment? True/False

Answer 3

True

Question 4

A post-validation survey provides detailed information that addresses current RF coverage and determines whether there is sufficient coverage to support the network design requirements it also includes information that addresses interference sources, equipment placement, and rogue devices? True/False

Answer 4

True

Question 5

A layer 2 site survey is used for AP-on-a-Stick APoS? True/False

Answer 5

True

Question 6

A layer 1 site survey is used to detect (non-Wi-Fi) RF activity? True/False

Answer 6

True

Question 7

What is the minimum recommend signal strength in dBm and SNR dB for voice applications is -92 dBm (-67 dBm + SNR is 25 dB)? True/False

Answer 7

True

Question 8

The first step in the analysis of a post site survey to verify signal coverage? True/False

Answer 8

True

Question 9

The signal coverage is measured in dBm (decibel-per-milliwatt)? True/False

Answer 9

True

Question 10

Decibel dB measures the power between two levels. Therefore dB is not an absolute measurement but rather a ratio and used for quantifying rations between values such as SNR signal to noise ratio. True/False

Answer 10

True

Question 11

Signal coverage is measured in dBm decibels per miliwatt the power the antenna is emitting? True/False

Answer 11

True

Question 12

Very high dBm can result in the amplification of interference and background noise, which will result in a poor quality signal? True/False

Answer 12

True

Question 13

For voice deployments, it is recommended that the cell edge should be at -67 dBm with 20 percent overlap? True/False

Answer 13

True

Question 14

Rogue APs are wireless APs that have been installed on an enterprise network without the authorization of the enterprise information technology department. Most rogue APs are not installed securely and can be used by outsiders to gain access to an enterprise network. True/False

Answer 14

True

Question 15

Rogue APs are a source of co-channel and adjacent channel RF interference, which degrades the performance of the enterprise WLAN? True/False

Answer 15

True

Question 16

inSSIDer is used to track received signal strength with an installed wireless adapter and is not a full solution for wireless packet and spectrum analysis? True/False

Answer 16

True

Question 17

Voice and video calls are real time applications? True/False

Answer 17

True

Question 18

Cisco Spectrum Expert is an analysis tool that can used to locate and isolate sources of interference and identify above average channel utilization after the initial deployment? True/False

Answer 18

True

Question 19

For voice deployment recommended cell edge is -67dBm required 20% cell overlap with a channel utilization of 50% or less a noise floor of -92dBm a SNR signal to noise ratio of 25dB with retransmissions of 20% or less and packet loss of 1% with jitter no more than 100ms. True/False

Answer 19

True

Question 20

A VoWLAN design must include a minimum of the three non-overlapping channels that are consistent with the 802.11 specifications for 2.4 GHz and 5 GHz? True/False

Answer 20

True

Question 21

What is a security feature that is a best practice on guest WLANs that blocks direct connection between clients connected to the same WLAN?

Answer 21

Peer-to-Peer Blocking

Question 22

Bluetooth has the characteristics of being fairly low power and spiky. The spikes are a result of the type of spread spectrum technology Bluetooth uses (FHSS), which hops across the 2.4 GHz band? True/False

Answer 22

True

Question 23

Microwave ovens transmit RF at a high power (mostly around 800-1200W) and have a center frequency of 2450 MHz (channel 9)? True/False

Answer 23

True

Question 24

Wireless client lose throughput when other clients associate to the same AP because they contend for the same airtime. On a certain frequency, only one antenna (client or AP) can transmit at the same time. As more clients join the network, they must wait longer before they can send packets, lowering the throughput? True/False

Answer 24

True

Question 25

The minimum cell edge RSSI recommendation of -67 dBm implies that the noise floor is -92 dBm (-92 dBm + 25 dB = -67 dBm). When the SNR noise floor is higher or lower, the minimum cell edge RSSI should be changed accordingly? True/False

Answer 25

True

Question 26

WPA2-Enterprise and EAP-TLS. EAP-TLS is an authentication method that requires both client and server certificates? True/False

Answer 26

True

Question 27

A passive survey is a type of layer 2 survey that assesses the presence of Wi-Fi by listening to beacons. The survey client does not associate to APs, which means no uplink information can be gathered? True/False

Answer 27

True

Question 28

You arrive at a customer site for the first time to perform a site survey. The first thing that should be done is performing a walk-through survey to visually inspect the environment. During the walk-through, you can do a number of things: verify the floor plans you were given, take pictures, identify roaming paths, check user density? True/False

Answer 28

True

Question 29

To perform a predictive survey, you need your laptop with predictive survey software installed, floor plans, and the customer requirements. All the other equipment is used at some point in the Wi-Fi design/deployment process, but not during the predictive site survey? True/False

Answer 29

True

Question 30

Cisco Prime Infrastructure is the only tool listed that cannot be used for onsite surveys? True/False

Answer 30

True

Question 31

When you lower data rates it increases the effective range of the AP? True/False

Answer 31

True

Question 32

Demodulation is the extraction of carried information from a modulated carrier wave? True/False

Answer 32

True

Question 33

When you increase the RF range it results in greater coverage at the expense of overall throughput? True/False

Answer 33

True

Question 34

When you decrease the RF range it results in better performance and reduces co-channel interference, and effectively decreases channel utilization? True/False

Answer 34

True

Question 35

Predictive site survey is performed off-site with information that is provided by the customer only and used for budgetary planning or virtual modeling. It also must be validated with onsite data. True / False

Answer 35

True

Question 36

Layer 1 sweep is referred to a spectrum analyzer and is the first step in the predeployment site survey and used to identify existing RF and possible sources of RF interference. Done during an active site survey on systems that support multiple adapters. True / False

Answer 36

True

Question 37

Active Survey are also referred to as AP-on-a-Stick? True/False

Answer 37

True

Question 38

Cisco Prime Infrastructure is used for predictive RF planning and can be used for existing or new deployments. No visability of interference sources during RF planning. True/ False

Answer 38

True

Question 39

Post deployment survey is used to verify coverage, capacity and performance criteria. True / False

Answer 39

True