8 05 2014

QUESTION 81
The IEEE 802.11n standard provides 40-MHz channels, improved MAC efficiency, and MIMO.
Which three elements define the 802.11n implementation of MIMO? (Choose three.)

A.    channel bonding
B.    dynamic frequency selection
C.    maximal ratio combining
D.    packet aggregation
E.    spatial multiplexing
F.    transmit beam forming

Answer: CEF

QUESTION 82
Which two statements about WiMAX technology are true? (Choose two.)

A.    WiMAX is defined by 802.11i.
B.    Typically, fixed WiMAX networks have a higher-gain directional antenna installed near the client.
C.    WiMAX is capable of working as a long-range system over several miles.
D.    WiMAX works only for licensed frequencies.

Answer: BC

QUESTION 83
Which governing body analyzes the applications and environments in which wireless networks are used?

A.    EIRP
B.    ETSI
C.    FCC
D.    IEEE
E.     WiFi Alliance

Answer: D

QUESTION 84
Which description best describes upfade in a multipath environment?

A.    In this situation, multiple signal paths are not sent at exactly the same time. The receiver receives a
positive crest on the primary signal and a negative crest on the secondary signal.
B.    In this situation, the multiple signal paths are distorted and difficult to understand.
C.    In this situation, the multiple signal paths are weaker than they should be because the signals are out
of phase with each other.
D.    In this situation, the signal is stronger than it should be because multiple signal paths are received
twice at exactly the same time, which results in the multiple signals being in-phase.

Answer: D

QUESTION 85
A controller is connected to a Cisco Catalyst switch. The switch port configuration looks like this:
interface GigabitEthernet 1/0/10
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,20,30,50
switchport trunk native vlan 20
switchport mode trunk
Which controller CLI command assigns its management interface to the native VLAN interface of the Cisco Catalyst switch?

A.    config interface vlan management 0
B.    config interface vlan management 1
C.    config interface vlan management 20
D.    config interface vlan management 30
E.    config interface vlan management 50

Answer: A

QUESTION 86
Which statement about an infrastructure basic service set is true according to IEEE 802.11 specifications?

A.    The set also is called an ad hoc network.
B.    The BSSID is generated from the first wireless client that starts up in the IBSS.
C.    The set enables the use of ESS.
D.    No signals are relayed from one client to another client.

Answer: C

QUESTION 87
Which two factors must be considered when evaluating an RF interferer for severity? (Choose two.)

A.    distance from the AP
B.    dBm
C.    the type of security crack being used
D.    duty cycle
E.    number of interfering IP stations in the cell
F.    duplicate SSID

Answer: BD

QUESTION 88
Which two items are needed to discover the IP address of a new Cisco Aironet 1260 autonomous AP that just finished booting? (Choose two.)

A.    username = “cisco” and password = “cisco”
B.    username = “Admin” and password = “Cisco”
C.    username = none and password = “Cisco”
D.    show int vlan1
E.    show int bvi1
F.    show int gigabitethernet0
G.    show int radio0-802.11n
H.    show int radio1-802.11n

Answer: CE

QUESTION 89
Which statement correctly describes the procedure for a lightweight AP to successfully establish a connection to a controller?

A.    The AP authenticates the received Cisco WLC certificate as valid. The AP then sends its certificate
to the controller.
B.    The AP sends its certificate to the controller. The AP then authenticates the received Cisco WLC
certificate as valid.
C.    The AP sends its certificate to the RADIUS server. The AP then authenticates the controller certificate
as valid.
D.    The AP sends its certificate to the RADIUS server. The AP then authenticates the RADIUS certificate
as valid.
E.    The AP authenticates the received RADIUS server certificate as valid. The AP then sends its certificate
to the RADIUS server.
F.    The AP authenticates the received RADIUS server certificate as valid. The AP then sends its certificate
to the controller.

Answer: B

QUESTION 90
Which two statements about the requirements to configure inter-controller roaming are true? (Choose two.)

A.    The same mobility domain names are configured across controllers.
B.    The same RF group names are configured across controllers.
C.    The same controller hardware version is configured across controllers.
D.    The same AP manager interface is configured across controllers.
E.    The same virtual interface is configured across controllers.
F.    The same controller software version is configured across controllers.

Answer: AE

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