345-1

1. With the center frequency of channel 1 at 2.412 GHz, what is the center frequency of channel 2?

. 2.444 GHz

2.417 GHz

2.424 GHz

2.422 GHz

2. ) ACKS are required for which of the following frames?

Unicast

Broadcast

Multicast

Anycast

3. The Barker Code converts a bit of data into a series of bits that are referred to as what?

Chipset

Chips

Convolutional code

Complementary code

4. In an FHSS system, throughput can be increased by which of the following?

Shortening the dwell time and lengthening the hop time

Shortening the dwell time and shortening the hop time

Lengthening the dwell time and shortening the hop time

Lengthening the dwell time and lengthening the hop time

5. Which layers of the OSI model are referenced in the 802.11 standard? (choose two)

Application

Data-Link

Presentation

Physical

Transport

Network

Submit

6. HR-DSSS (clause 18) calls for data of 5.5 Mbps and 11 Mbps. What is the average amount of aggregate throughput percentage at any data rate?

80 percent

75 percent

50 percent

100 percent

7. Which wireless topology provides citywide wireless coverage?

WMAN

WLAN

WPAN

WAN

WWAN

8. ) What is the default configuration mode that allows an AP radio to operate in a basic service set?

Scanner

Repeater

Root

Access

Non-root

9. WLAN users have recently complained about gaps in audio and problems with the push-to-talk capabilities of the ACME Company's VoWiFi phones. What could be the cause of this problem?

Misconfigured TIM setting

Misconfigured DTIM setting

Misconfigured ATIM setting

Misconfigured BTIM setting

10. Which option is a wireless computer topology used for communication of computer devices within close proximity of a person?

WLAN

Bluetooth

ZigBee

WPAN

WMAN

11. When a station sends an RTS, the Duration/ID field notifies the other stations that they must set their NAV timers to which of the following values?

213 microseconds

The time necessary to transmit the DATA and ACK frames

The time necessary to transmit the CTS frame

The time necessary to transmit the CTS, DATA, and ACK frames

12. What would be needed for multiple basic service sets (BSSs) to exist within the same coverage area of a single access point and in which all the client stations would be segmented in separate layer 2/3 domains but all communicate within a single layer 1 RF domain?

Virtual BSSIDs

SSIDs

VLANs

Autonomous APs

None of the above

13. Hybrid Coordination Function (HCF) defines what allotted period of time in which a station can transmit multiple frames?

Block acknowledgment

Polling

Virtual carrier-sense

Physical carrier-sense

TXOP

14. ) If data is corrupted by previous data from a reflected signal, this is known as what?

Delay spread

ISI

Forward error creation

Bit crossover

15. What components make up a distribution system? (choose two)

DSSS

Distribution system services

DSM

DSSI

Intrusion Detection System

Submit

16. After a station sees its AID in the TIM, what typically is the next frame that the station transmits?

Data

PS-Poll

ATIM

ACK

17. 802.11 collision detection is handled using which technology?

Network allocation vector (NAV)

Clear channel assessment (CCA)

Duration/ID value

Receiving an ACK from the destination station

Positive collision detection cannot be determined

18. ACK and CTS frames can follow which interframe space?

EIFS

DIFS

PIFS

SIFS

LIFS

19. ) Which option best describes a device used to provide wireless connectivity for a small number of wired clients?

VPN router

Wireless workgroup bridge

Wireless mesh router

Wireless Ethernet repeater

Wireless bridge

20. WMM-PS is based on which 802.11-2007 power management method?

S-APSD

U-APSD

PSMP

SM Power Save

PS-Poll

21. Assuming all channels are supported by a 5 GHz access point, how many possible channels can be configured on the access point?

4

11

12

24

22. What best describes "hop time"?

The period of time that the transmitter waits before hopping to the next frequency

The period of time that the standard requires when hopping between frequencies

The period of time that the transmitter takes to hop to the next frequency

The period of time the transmitter takes to hop through all of the FHSS frequencies

23. ) As defined by the 802.11g amendment, how much separation between center frequencies is needed between center frequencies of channels in the UNII-2 Extended band?

10 MHz

20 MHz

22 MHz

25 MHz

30 MHz

24. The Carrier Sense portion of CSMA/CA is performed using which of the following methods? (choose three)

Virtual carrier-sense

Physical carrier-sense

Channel sense window

Clear channel assessment

Submit

25. How many root bridges exist in a point-to-multipoint bridge link?

None

One

Two

Multiple

26. What information that comes from teh wired side network is used to assign traffic into access categories on a WLAN controller?

DSCP bits

Duration/ID

802.1D priority tags

Destination MAC address

Source MAC address

27. At which layer of the OSI model will a BSSID address be used?

Physical

Network

Session

Data-Link

Application

28. Which of the following are valid ISM bands? (choose three)

902-928 MHz

2.4-2.4835 GHz

5.725-5.825 GHz

5.725-5.875 GHz

Submit

29. Which of the following 802.11 frames carry an MSDU payload that may eventually be transferred by the integration service into an 802.3 Ethernet frame?

. 802.11 management frames

802.11 control frames

802.11 data frames

. 802.11 power-management frames

802.11 action frames

30. ) After the station has performed the carrier sense and determined that no other devices are transmitting for a period of a DIFS interval, the next step is for the station to do what?

Wait the necessary number of slot times before transmitting.

Begin transmitting

Select a random backoff value

Begin the random backoff timer

31. ) A ____ uses a proprietary layer 2 roaming protocol, and a utilizes a proprietary layer 2 encryption

Wireless mesh access point, enterprise encryption gateway

Enterprise wireless gateway, WLAN controller

WLAN controller, CC-AP

CC-AP, enterprise wireless gateway

WLAN array, CC-AP

32. The WLAN help desk gets a call that all of the sudden, all of the HR-DSSS (802.11b) VoWiFi phones cannot connect to any of the ERP (802.11g) lightweight access points that are managed by a multiple-channel architecture WLAN controller. However, all the laptops with ERP (802.11g) radios can still connect. What are the possible causes of this problem? (Choose two)

The WLAN admin disable the 1, 2, 5.5, and 11 Mbps data rates on the controller.

The WLAN admin disable the 6 and 9 Mbps data rates on the controller.

The WLAN admin enabled the 6 and 9 Mbps data rates on the controller as basic rates

The WLAN admin configured all the APs on channel 6.

Submit

33. The 802.11-2007 standard requires how much separation between center frequencies for HR-DSS (clause 18) channels to be considered nonoverlapping?

22 MHz

25 MHz

30 MHz

35 MHz

40 MHz

34. What protocols are used to transport 802.11 frames between a lightweight AP and a WLAN controller? (choose two)

GRE

CCMP

Mobile IP

PPTP

Proprietary IP tunneling protocols

Submit

35. A network administrator is having a hard time getting two WLAN bridges to associate with one another in a PtP link. The bridge in Building A is on the 172.16.1.0/24 network, while the bridge in Building B resides on the 172.16.2.0/24 network. What is the most likely cause?

The bridges are on different subnets

The bridges are both configured as non-root

The gateway address is incorrect

The ACK time-out setting is short

There is impedance overflow

36. What term best describes two access points communicating with each other wirelessly while also allowing clients to communicate through the access point?

WDS

DS

DSS

DSSS

DSM

37. The 802.11 standard defines which medium to be used in a distribution system (DS)?

802.3 Ethernet

802.15

. 802.5 token ring

Star-bus topology

None of the above

38. How does a client station indicate that it is using Power Save mode?

It transmits a frame to the access point with the Sleep field set to 1.

It transmit a frame to the access point with the Power Management field set to 1.

Using DTIM, the access point determines when the client station uses Power Save mode.

It doesn't need to, because Power Save mode is the default.

39. If a station is in Power Save mode, how does it know that the AP has buffered unicast frames waiting for it?

By examining the PS-Poll frame

By examining the TIM field

When it receives an ATIM

When the Power Management bit is set to 1.

DTIM interval

40. ) When a client station is first powered on, what is the order of frames generated by the client station and access point?

Probe request, probe response, association request/response, authentication request/response

Probe request, probe response, authentication request/response, association request/response

Association request/response, authentication request/response, probe request, probe response

Authentication request/response, association request/response, probe request, probe response

41. The Wi-Fi Alliance certification called Wi-Fi Multimedia (WMM) is based on which media access method defined by the 802.11-2007 standard?

DCF

PCF

EDCA

HCCA

HSRP

42. Which technologies are used in the 2.4 GHz ISM band? (Choose all that apply)

FHSS

ERP

DSSS

HR-DSSS

Submit

43. DCF is also known as what? (choose two)

Carrier Sense Multiple Access with Collision Detection (CSMA/CD)

Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA)

Data Control Function

Distributed Coordination Function

Submit

44. 802.11 wireless networking will not scale appropriately to accommodate which wireless topology?

WLAN

WPAN

WMAN

WWAN

VLAN

45. OFDM uses how many 312.5 KHz subcarriers for transmitting data?

54

52

48

36

46. Which of the following contains the information found inside an IP packet?

MPDU

PPDU

PSDU

MSDU

MMPDU

47. Which of the following information is included in a probe response frame? (Choose four)

Time stamp

Supported data rates

Service set capabilities

SSID

Traffic indication map

Submit

48. Which radio formats can be used by 802.11 technology?

CF

Secure Digital

PCMCIA

Mini PCI

ExpressCard

Proprietary

. All of the above

49. What devices can be used to manage multiple autonomous access points from a centralized location?

WLAN controller

WNMS

WLAN switch

Enterprise wireless gateway

Wireless IDS

50. Which of these technologies is the most resilient against the negative effects of multipath?

FHSS

DSSS

HR-DSSS

OFDM

51. What are some of the common capabilities of a WLAN controller architecture?

Dynamic RF

AP management

Layer 3 roaming support

Bandwidth throttling

Firewall

All of the above

52. Which spread spectrum technology specifies data rates of 22 Mbps and 33 Mbps?

DSSS

ERP-PBCC

OFDM

PPtP

53. 802.11 draft (HT clause 20 radios) can transmit in which frequency bands? (Choose three that apply)

. 2.4-2.4835 GHz

5.47-5.725 GHz

902-928 GHzc. 902

5.15-5.25 GHz

Submit

54. What are the modulation types used by OFDM technology? (choose two)

QAM

Phase

. Frequency

Amplitude

Submit

55. What are the only three topologies defined by the 802.11 standard? (choose three)

. Bridge mode

Extended service set

BSS

IBSS

FHSS

Submit

56. A WNMS server can be used to manage what kind of devices? (Choose two)

Autonomous APs

Virtual APs

Residential wireless gateways

Enterprise wireless gateways

WLAN controllers

Submit

57. ) What is the difference between association frames and reassociation frames? (Choose two)

Association frames are management frames, wherease reassociation frames are control frames.

Reassociation frames are only used in fast BSS transition.

Association frames are used exclusively for roaming.

Reassociation frames contain the BSSID of the original AP.

Only association frames are used to join a BSS.

Submit

58. Which wired network hardware devices do access points most resemble? (choose two)

Switch

Node

Hub

Router

Server

Submit

59. What are the required components of a VoWiFi architecture using WMM quality-of-service mechanisms? (Choose four)

VoWiFi phone

WLAN controller

QoS server

Lightweight access point

PBX

Submit

60. A network consisting of clients and two or more access points connected by an 802.3 Ethernet backbone is one example of which 802.11 topology? (choose two)

ESS

Basic Service set

Extended service set

. IBSS

Ethernet service set

Submit

61. What would cause an 802.11 station to retransmit a unicast frame? (Choose two)

The transmitted unicast frame was corrupted

The ACK frame from the receiver was corrupted.

The receiver's buffer was full.

The transmitting station will attempt to retransmit the data frame.

The transmitting station will send a retransmit notification.

Submit

62. What factors might affect the size of a BSA coverage area of an access point?(Choose three)

Antenna gain

CSMA/CA

Transmission power

Indoor/outdoor surroundings

Distribution system

Submit

63. ) What CSMA/CA mechanism is used for medium contention? (choose two)

NAV

Frame control

Duration/ID

Sequence number

Strictly ordered bit

64. What QoS mechanism can be used to reduce medium contention overhead during a frame burst of low-latency traffic?

Delayed Block ACK

Contention Period

Contention Window

Contention-free period

Immediate Block ACK

65. STAs operating in infrastructure mode may communicate in which of the following scenarios? (choose two)

802.11 frame exchanges with other STAs via an AP

802.11 frame exchanges with an AP in scanner mode

802.11 frame peer-to-peer exchanges directly with other STAs

Upper-layered frame exchanges with network devices on the DSM

All of the above

Submit

66. What term best describes a WLAN architecture where the integration service (IS) and distribution system servises (DSS) are handled by a WLAN controller while generation of certain 802.11 management and control frames are handled by a lightweight AP?

Cooperative control

Distributed data forwarding

Distributed hybrid architecture

Distributed WLAN architecture

Split MAC

67. ) What type of wireless topology is defined by the 802.11 standard?

WAN

WLAN

WWAN

WMAN

WPAN

None of the above

68. On which device can you configure VLANs? (choose two)

WIPS server

Lightweight AP

Ethernet switch

WLAN controller

Submit

69. The basic service set identifier address can be found in which topologies? (choose three)

FHSS

IBSS

ESS

DSSS

BSS

Submit

70. Support for roaming is required under the 802.11 standard. Which 802.11 service set may allow for roaming?

ESS

Basicservice set

Co-located APs

IBSS

Spread spectrum service set

71. In North America, the 802.11 standard designates what frequency space for use of FHSS transmissions?

2.2 GHz - 2.4835 GHz

2.402 GHz - 2.480 GHz

30 5.725 GHz - 5.825 GHz

5.725 GHz - 5.875 GHz

None of the above

72. Which of the following are protection mechanisms? (choose two)

NAV backoff

. RTS/CTS

RTS-to-Self

CTS-to-Self

WEP encryption

Submit

73. What are the two reasons that 802.11 radios use physical carrier-sense? (Choose two)

Synchronize incoming transmissions

Synchronize outgoing transmissions

Reset the NAV

Start the random back-off timer

Assess the RF medium

Submit

74. ) CSMA/CA and DCF define which mechanisms to ensure that only one 802.11 radio can transmit on the half-duplex RF medium? (Choose four)

Random back-off timer

NAV

CCMP

CCA

Interframe spacing

Submit

75. Billy must connect Building A via a WLAN bridge link to Building C, which is 30 miles away. He cannot make a direct connection of that distance due to regulatory power restrictions in his country. Building B sits between the two remote buildings. What is the best way for Billy to link the two buildings together using WLAN bridges?

76. When is an ERP (802.11g) access point required by the IEEE 802.11-2007 standard to respond to probe request frames from nearby HR-DSSS (802.11b) stations? (Choose two)

When the probe request frames contain a null SSID value

When the access point supports only ERP-OFDM data rates

When the access point supports only HR/DSSS data rates

When the Power Management bit is set to 1.

When the probe request frames contain the correct SSID value.

Submit

77. ) Which terms best describe components of a centralized WLAN architecture in which all the intelligence resides in a centralized device and pushes the configuration settings down to the access point? (choose two)

WLAN controller

Wireless Network Management System

. Enterprise wireless gateway

Cooperative control AP

Lightweight AP

Submit

78. What are some of the parameters of a WLAN profile that can be configured on a WLAN controller? (Choose four)

SSID

Channel

VLAN

WMM

WPA-2

Submit

79. The original 802.11 amendment requires how much separation between center frequencies for DSSS channels to be considered non-overlapping?

22 MHz

25 MHz

30 MHz

35 MHz

40 MHz

80. Currently, WMM is based on EDCA and provides for traffic prioritization via which of the following access categories? (Choose four)

WMM Voice priority

WMM Video priority

WMM Audio priority

WMM Best Effort priority

WMM Background priority

Submit

81. The 802.11e amendment (now part of the 802.11-2007 standard) defines which of the following medium access methods to support QoS requirements? (Choose three)

Distributed Coordination Function (DCF)

Enhanced Distributed Channel Access (EDCA)

Hybrid Coordination Function (HCF)

Point Coordination Function (PCF)

Hybrid Coordination Function Controlled Access (HCCA)

Submit

82. What features can be found on a WLAN controller? (choose four)

VRRP

Captive portal

HSRP

RBAC

Wireless Intrusion Detection System

Submit

83. ) Which option best describes a layer 3 device used to secure a Internet connection for a small number of wireless users?

VPN router

Wireless workgroup bridge

Wireless mesh router

Residential wireless gateway

Wireless hub

84. Which two 802.11 topologies require the use of an access point? (choose two)

WPAN

. IBSS

Basic service set

Ad-hoc

ESS

Submit

85. Which of the following statements are about PCF are true? (choose three)

PCF will work in only a BSS.

PCF can be used in an IBSS.

Both the station and access point must support PCF for it to be used.

The access point will alternate between PCF and DCF mode.

PCF is a form of contention

Submit

86. What are some nonstandard modes in which an AP radio may be configured? (choose three)

Scanner

Root

Bridge

Non-root

Repeater

Submit

87. Which of the following are true about scanning? (Choose two)

There are two types of scanning: passive and active.

Stations must transmit probe requests in order to learn about local access points.

The 802.11 standard allows access points to ignore probe requests for security reasons.

It is common for stations to continue to send probe requests after being associated to an access point.

Submit

88. Which of the following terms are affiliated with the virtual carrier-sense mechanism? (choose two)

Contention window

Network allocation vector

Random back-off time

Duration/ID field

Submit

89. The EDCA medium access method provides for the prioritization of traffic via priority tags that are identical to the 802.1D priority tags. What are the EDCA priority tags known as?

TXOP

UP levels

Priority levels

Priority bits

PT

90. Which of the following are true about beacon management frames? (Choose two)

. Beacons can be disabled to hide the network from intruders.

Time-stamp information is used by the clients to synchronize their clocks.

In a BSS, clients share the responsibility of transmitting the beacons.

Beacons can contain vendor-proprietary information.

Submit

91. In a multiple-channel architecture, roaming is controlled by the client station and occurs based on a set of proprietary rules determined by the manufacturer of the wireless radio. Which of the following parameters are often used when making the decision to roam? (Choose two)

Received signal level

Distance

SNR

WMM access categories

Submit

92. When deploying an ERP-OFDM wireless network with only two access points, which of these channel groupings would be considered nonoverlapping (Choose two)

Channels 1 and 3

Channels 7 and 10

Channels 3 and 8

Channels 5 and 11

Channels 6 and 10

Submit

93. What 802.11 infrastructure devices are capable of participating in a WLAN by busing distributed data forwarding (DDF) at various network layers? (choose three)

Autonomous AP

. Core layer WLAN controller

Distribution layer WLAN controller

WLAN array

Hybrid access point

Submit

94. An 802.11 wireless network name is which type of address? (choose two)

BSSID

MAC address

IP address

SSID

Extended service set identifier

Submit

95. ) If PCF is implemented, it can function in which of the following network environments? (choose two)

Ad-Hoc mode

BSS

. IBSS

. Infrastructure mode

. BSA

Submit

96. ) What are some of the advantages of using U-APSD and WMM-PS power management over legacy power-management methods? (Choose four)

Applications control doze time and trigger frames

U-APSD access points transmit all voice and video data immediately.

The client does not have to wait for a beacon.

Downlink traffic is sent in a frame burst

Data frames are used as trigger frames. PS-Poll frames are not used

Submit

97. What options best describe components of a WLAN intelligent edge architecture? (choose two)

Lightweight access point

. Autonomous AP

WLAN switch

VPN router

WNMS

Submit

98. The presence of what type of transmissions can trigger the protection mechanism within an ERP basic service set? (Choose three)

Association of an HR-DSSS client

Association of an ERP-OFDM client

HR-DSSS beacon frame

ERP beacon frame with the NonERP_Present bit set to 1

Association of an FHSS client

Submit

99. Which terms describe an 802.11 topology involving STAs but no access points? (choose three)

BSS

Ad-hoc

DSSS

. . Infrastructure

. IBSS

. Peer-to-Peer

Submit

345-1

1. With the center frequency of channel 1 at 2.412 GHz, what is the center frequency of channel 2?

2.

What first name or nickname would you like us to use?

2. ) ACKS are required for which of the following frames?

3. The Barker Code converts a bit of data into a series of bits that are referred to as what?

4. In an FHSS system, throughput can be increased by which of the following?

5. Which layers of the OSI model are referenced in the 802.11 standard? (choose two)

6. HR-DSSS (clause 18) calls for data of 5.5 Mbps and 11 Mbps. What is the average amount of aggregate throughput percentage at any data rate?

7. Which wireless topology provides citywide wireless coverage?

8. ) What is the default configuration mode that allows an AP radio to operate in a basic service set?

9. WLAN users have recently complained about gaps in audio and problems with the push-to-talk capabilities of the ACME Company's VoWiFi phones. What could be the cause of this problem?

10. Which option is a wireless computer topology used for communication of computer devices within close proximity of a person?

11. When a station sends an RTS, the Duration/ID field notifies the other stations that they must set their NAV timers to which of the following values?

12. What would be needed for multiple basic service sets (BSSs) to exist within the same coverage area of a single access point and in which all the client stations would be segmented in separate layer 2/3 domains but all communicate within a single layer 1 RF domain?

13. Hybrid Coordination Function (HCF) defines what allotted period of time in which a station can transmit multiple frames?

14. ) If data is corrupted by previous data from a reflected signal, this is known as what?

15. What components make up a distribution system? (choose two)

16. After a station sees its AID in the TIM, what typically is the next frame that the station transmits?

17. 802.11 collision detection is handled using which technology?

18. ACK and CTS frames can follow which interframe space?

19. ) Which option best describes a device used to provide wireless connectivity for a small number of wired clients?

20. WMM-PS is based on which 802.11-2007 power management method?

21. Assuming all channels are supported by a 5 GHz access point, how many possible channels can be configured on the access point?

22. What best describes "hop time"?

23. ) As defined by the 802.11g amendment, how much separation between center frequencies is needed between center frequencies of channels in the UNII-2 Extended band?

24. The Carrier Sense portion of CSMA/CA is performed using which of the following methods? (choose three)

25. How many root bridges exist in a point-to-multipoint bridge link?

26. What information that comes from teh wired side network is used to assign traffic into access categories on a WLAN controller?

27. At which layer of the OSI model will a BSSID address be used?

28. Which of the following are valid ISM bands? (choose three)

29. Which of the following 802.11 frames carry an MSDU payload that may eventually be transferred by the integration service into an 802.3 Ethernet frame?

30. ) After the station has performed the carrier sense and determined that no other devices are transmitting for a period of a DIFS interval, the next step is for the station to do what?

31. ) A ______________________ uses a proprietary layer 2 roaming protocol, and a __________________ utilizes a proprietary layer 2 encryption

33. The 802.11-2007 standard requires how much separation between center frequencies for HR-DSS (clause 18) channels to be considered nonoverlapping?

34. What protocols are used to transport 802.11 frames between a lightweight AP and a WLAN controller? (choose two)

35. A network administrator is having a hard time getting two WLAN bridges to associate with one another in a PtP link. The bridge in Building A is on the 172.16.1.0/24 network, while the bridge in Building B resides on the 172.16.2.0/24 network. What is the most likely cause?

36. What term best describes two access points communicating with each other wirelessly while also allowing clients to communicate through the access point?

37. The 802.11 standard defines which medium to be used in a distribution system (DS)?

38. How does a client station indicate that it is using Power Save mode?

39. If a station is in Power Save mode, how does it know that the AP has buffered unicast frames waiting for it?

40. ) When a client station is first powered on, what is the order of frames generated by the client station and access point?

41. The Wi-Fi Alliance certification called Wi-Fi Multimedia (WMM) is based on which media access method defined by the 802.11-2007 standard?

42. Which technologies are used in the 2.4 GHz ISM band? (Choose all that apply)

43. DCF is also known as what? (choose two)

44. 802.11 wireless networking will not scale appropriately to accommodate which wireless topology?

45. OFDM uses how many 312.5 KHz subcarriers for transmitting data?

46. Which of the following contains the information found inside an IP packet?

47. Which of the following information is included in a probe response frame? (Choose four)

48. Which radio formats can be used by 802.11 technology?

49. What devices can be used to manage multiple autonomous access points from a centralized location?

50. Which of these technologies is the most resilient against the negative effects of multipath?

51. What are some of the common capabilities of a WLAN controller architecture?

52. Which spread spectrum technology specifies data rates of 22 Mbps and 33 Mbps?

53. 802.11 draft (HT clause 20 radios) can transmit in which frequency bands? (Choose three that apply)

54. What are the modulation types used by OFDM technology? (choose two)

55. What are the only three topologies defined by the 802.11 standard? (choose three)

56. A WNMS server can be used to manage what kind of devices? (Choose two)

57. ) What is the difference between association frames and reassociation frames? (Choose two)

58. Which wired network hardware devices do access points most resemble? (choose two)

59. What are the required components of a VoWiFi architecture using WMM quality-of-service mechanisms? (Choose four)

60. A network consisting of clients and two or more access points connected by an 802.3 Ethernet backbone is one example of which 802.11 topology? (choose two)

61. What would cause an 802.11 station to retransmit a unicast frame? (Choose two)

62. What factors might affect the size of a BSA coverage area of an access point?(Choose three)

63. ) What CSMA/CA mechanism is used for medium contention? (choose two)

64. What QoS mechanism can be used to reduce medium contention overhead during a frame burst of low-latency traffic?

65. STAs operating in infrastructure mode may communicate in which of the following scenarios? (choose two)

66. What term best describes a WLAN architecture where the integration service (IS) and distribution system servises (DSS) are handled by a WLAN controller while generation of certain 802.11 management and control frames are handled by a lightweight AP?

67. ) What type of wireless topology is defined by the 802.11 standard?

68. On which device can you configure VLANs? (choose two)

69. The basic service set identifier address can be found in which topologies? (choose three)

70. Support for roaming is required under the 802.11 standard. Which 802.11 service set may allow for roaming?

71. In North America, the 802.11 standard designates what frequency space for use of FHSS transmissions?

72. Which of the following are protection mechanisms? (choose two)

73. What are the two reasons that 802.11 radios use physical carrier-sense? (Choose two)

74. ) CSMA/CA and DCF define which mechanisms to ensure that only one 802.11 radio can transmit on the half-duplex RF medium? (Choose four)

76. When is an ERP (802.11g) access point required by the IEEE 802.11-2007 standard to respond to probe request frames from nearby HR-DSSS (802.11b) stations? (Choose two)

77. ) Which terms best describe components of a centralized WLAN architecture in which all the intelligence resides in a centralized device and pushes the configuration settings down to the access point? (choose two)

78. What are some of the parameters of a WLAN profile that can be configured on a WLAN controller? (Choose four)

79. The original 802.11 amendment requires how much separation between center frequencies for DSSS channels to be considered non-overlapping?

31. ) A ____ uses a proprietary layer 2 roaming protocol, and a utilizes a proprietary layer 2 encryption