Summer Special Limited Time 65% Discount Offer - Ends in 0d 00h 00m 00s - Coupon code: exc65

examout.co

What factors will have the most significant impact on the amount of wireless bandwidth available to each station within a BSS? (Choose 2)

A.

The number of client stations associated to the BSS

B.

The power management settings in the access point’s beacons

C.

The presence of co-located (10m away) access points on non-overlapping channels

D.

The data rates at which nearby client stations are transmitting and receiving data

E.

The layer 3 protocol used by each station to transmit data over the wireless link

Which answer correctly completes the following sentence?

The WMM certification, created by the Wi-Fi Alliance, is based on the ___________ coordination function with support for ___________ QoS priority.

A.

Hybrid, contention-based

B.

Point, scheduled

C.

Dynamic, distributed

D.

Distributed, trigger-and-delivery

E.

Enhanced, contention-free

Users and Network support personnel at a mid-sized equipment manufacturer have been discussing the potential uses and benefits of implementing an indoor WLAN. The network administrator and network manager have requested a meeting of senior management personnel to discuss a WLAN implementation before performing a site survey or taking any implementation steps. The first topic of discussion in the meeting is the corporate policy concerning implementation and use of WLAN technology.

What specific topics are appropriate in this policy meeting? (Choose 2)

A.

Use of the latest 802.11ac equipment

B.

Business justification

C.

User productivity impact

D.

Antenna types

E.

Defining RF channels for use

As defined in the 802.11 specification, legacy Power Save requires an inefficient back-and-forth frame exchange process. Due to this inefficiency, many WLAN device implementations use a variation of 802.11 Power Save to accomplish the same function.

What non-standard power save behavior is used by most Wi-Fi devices in actual legacy Power Save implementations?

A.

Client devices ignore the TIM field and automatically send PS-Poll frames after every beacon.

B.

After each beacon, the AP attempts to empty its frame buffer by sending Wake-on-WLAN frames to wake each dozing client.

C.

Request-to-Send and Clear-to-Send frame exchanges are used to trigger the delivery of buffered data.

D.

The Beacon interval is changed from the default 100 time units to 10 or less time units.

E.

Clients send null data frames to the AP and switch the power management bit from 1 to 0 to receive queued data.

F.

Stations send a CTS-to-self frame to the AP with a very long duration period so they can receive all of their buffered data at once.

What type of device often causes interference across 50% or more of the 2.4 GHz frequency band?

A.

Military radar

B.

Properly configured AP

C.

Microwave oven

D.

Wireless video camera

E.

WIPS sensor

What factors are likely to cause the greatest impact on the application layer throughput of an 802.11n client station in a 2.4 GHz HT BSS? (Choose 3)

A.

Use of WEP or TKIP for encryption instead of CCMP

B.

Use of passphrase authentication instead of 802.1X/EAP authentication

C.

Increasing the beacon interval from 100 to 200 (TUs)

D.

RF interference from more than 10 nearby Bluetooth transmitters

E.

Increasing or decreasing the number of spatial streams in use by the client station and AP

What can cause an excessively high VSWR (Voltage Standing Wave Ratio) in a WLAN RF transmission line?

A.

An impedance mismatch in the RF cables and connectors

B.

Reflected direct current (DC) voltage on the main RF signal line

C.

Attenuation of the RF signal as it travels along the main signal path

D.

Crosstalk (inductance) between adjacent RF conductors

The IEEE 802.11-2012 standard requires VHT capable devices to be backward compatible with devices using which other 802.11 physical layer specifications (PHYs)? (Choose 2)

A.

HT

B.

OFDM

C.

HR/DSSS

D.

ERP-PBCC

E.

DSSS-OFDM

Prior to association, what parameter can 802.11 client devices measure and use to select the optimal access point for association?

A.

Signal strength of access point beacons received

B.

Proximity to potential access points

C.

Retry rate of probe request and response frames

D.

Average round trip time to reach the Internet DNS server

E.

Average round trip time to reach the IP router

What distinguishes an independent basic service set (IBSS) from an infrastructure basic service set (BSS)?

A.

An IBSS does not have a distribution system (DS), but a BSS does.

B.

An IBSS does not require beacon frames, but a BSS does.

C.

An IBSS does not support 802.11 authentication or association, but a BSS does.

D.

An IBSS does not support any 802.11ac enhancements, but a BSS does.