Exam Dumps VCE

QUESTION 25
Which one of the following portions of information is communicated by bits in the PHY Header?

QUESTION 26
How does a VoIP Phone, using WMM Power Save, request data frames buffered at the AP?

QUESTION 27
You are tasked with describing the various frames used in 802.11 communications.
What frame is used for spectrum management, fast BSS transition and some other actions taken within a BSA?

QUESTION 28
You are analyzing a packet decode of a Probe Request and notice the SSID element has a length of zero.
What do you conclude about the transmitting STA?

QUESTION 29
A PHY Header is added to the PSDU at which layer?

QUESTION 30
In the 2.4 GHZ band, what data rate are Probe Requests usually sent at from an unassociated STA?

QUESTION 31
802.11k Neighbor Requests and Neighbor Reports are sent in what type of Management Frames?

QUESTION 32
What does the value of the Listen Interval field in an Association Request frame indicate?

QUESTION 33
Given a protocol analyzer can decrypt WPA2-PSK data packets providing the PSK and SSID are configured in the analyzer software. When performing packet capture (in a non-FT environment) which frames are required in order for PSK frame decryption to be possible?

QUESTION 34
In a Spectrum Analyzer the Swept Spectrogram plot displays what information?

QUESTION 35
You have implemented an AP at a remote office. It is a single-band AP supporting 802.11ac. Several users complain that their laptops cannot connect to the WLAN. These laptops are from multiple vendors and range in age from 2 to 4 years. The SSID and security profile settings are correct. All default settings were used on the AP with the exception of the SSID and security settings.
What is the most likely issue preventing these STAs from connecting to the AP?

QUESTION 36
You are troubleshooting problems with DHCP in relation to lightweight APs. They vendor class identifier (VCI) is not specified in the DHCP server. When you contact vendor support, they inform you that it is not necessary.
When is this information true?

QUESTION 37
You are performing a multiple adapter channel aggregation capture to troubleshoot a VoIP roaming problem and would like to measure the roaming time from the last VoIP packet sent on the old AP’s channel to the first VoIP packet sent on the new AP’s channel. Which timing column in the packet view would measure this for you?

QUESTION 38
You have installed a new 802.1 lac WLAN configured with 80 MHz channels. Users in one area are complaining about poor performance. This area is currently served by a single AP. You take a spectrum analysis capture in the poor performing area. While examining the waterfall plot you notice the airtime utilization is higher on the first 20 MHz of the 80 MHz channel when compared to the rest of the channel.
What do you conclude?

QUESTION 39
You are considering disabling the data rates of 1, 2, 5.5 and 11 in the 2.4 GHz band.
What advantage might this provide to the networks operating in this band?

QUESTION 40
What is the function of the PHY layer?

QUESTION 41
You must report on frame types seen on the WLAN. You want to list the frame types by both name and binary value.
What frame type is represented by the binary value 011010, which includes the Type and Subtype values?

QUESTION 42
While troubleshooting DHCP issues, you perform a protocol capture in order to determine if the DNCP pool is depleted. The capture does not show DHCPnak messages.
Where else could you look to determine if the pool is depleted?

QUESTION 43
You are concerned with management overhead in your WLAN. When evaluating the network, you note that each dual-band AP provides for 4 SSIDs in each band with three secure SSIDs and one Open System SSID.
The network runs only 802.11ac APs and uses 20 MHz channels in 2.4 GHz and 400 MHz channels in 5 GHz.
What can you do to reduce the impact of beacon frames on CCI and channel utilization?

QUESTION 44
Protocol analyzers may present field values in either binary, decimal or hexadecimal. What preceeds a hexadecimal value to indicate it is hexadecimal?

QUESTION 45
When would you expect to see a Reassociation Request frame’

QUESTION 46
The data rate for a data frame is 150 Mbps in 5 GHz.
What rate is used to transmit the PHY header information?