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Home Cisco® 400-351

Cisco® 400-351 Exam Practice Questions (P. 5)

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Question #41
While reviewing data gathered during a passive RF site survey for an existing network of Cisco Aironet 1260 Series Access Points, you discover a high amount of potential co-channel interference throughout the network. Which two of these are potential causes? (Choose two.)
  1. A
    an inconsistent beacon interval
  2. B
    EDRRM is not enabled
  3. C
    the APs are placed too close together
  4. D
    a static channel plan is used
  5. E
    the radio policy is inadvertently set identically for all SSIDs

Correct Answer:
CD

Question #42
You are tasked with creating a controller-based high-density RF design. Which three factors determine the cell size? (Choose three.)
  1. A
    antenna type
  2. B
    ClientLink support
  3. C
    basic data rate
  4. D
    TPC threshold setting
  5. E
    AP placement
  6. F
    free space path loss

Correct Answer:
ACD

Question #43
You are tasked with designing a wireless network to support a specific 5-GHz wireless phone. During the initial design phase you are unable to obtain the client device radio specifications. From a network configuration perspective, which of these cannot be configured before you obtain the radio specifications?
  1. A
    band select
  2. B
    WMM queue selection
  3. C
    DCA channel list
  4. D
    channel width

Correct Answer:
C

Question #44
You are configuring an autonomous wireless guest network for your customer. The customer requires that guest users be unable to communicate with one another. Which solution best meets this requirement?
  1. A
    public secure packet forwarding on the AP and switch-port protected on the AP switch port
  2. B
    public secure packet forwarding on the AP and limiting the AP switch port to the guest VLAN only
  3. C
    port security on the AP and 802.1X on the AP switch port
  4. D
    MAC filtering on the AP radio interface and switch-port protected on the AP switch port
  5. E
    public secure packet forwarding on the AP and configuring the guest VLAN on the switched network as a private VLAN

Correct Answer:
E

Question #45
What is the advantage of EAP-FAST compared to LEAP?
  1. A
    EAP-FAST exchanges user credentials within a TLS tunnel whereas LEAP exchanges credentials information in clear, which allows possible offline "dictionary attacks."
  2. B
    EAP-FAST allows authenticated in-band PAC provisioning, whereas LEAP uses anonymous in-band PAC provisioning, which is transparent to the user.
  3. C
    LEAP only supports user and password changes in conjunction with MS-CHAPv2, whereas EAP-FAST supports user and password changes when using MS- CHAPv2 or OTP or PAC.
  4. D
    EAP-FAST works with the 802.11 authentication algorithm "open eap," and also with "network-eap," whereas LEAP is limited to the 802.11 authentication

Correct Answer:
A

Question #46
Which of the below statement is correct with regards to configuring local MAC authentication on an AP?
  1. A
    A MAC address can be spoofed, so it is insecure.
  2. B
    The MAC address is used in stead of the username in the EAP certificate exchange.
  3. C
    The MAC address may be used in the key hash, if WEP is used as a key cipher.
  4. D
    MAC address authentication can not co-exist with EAP authentication.

Correct Answer:
A

Question #47
Which two statements are not correct about client MFP? (Choose two.)
  1. A
    Client MFP can replace infrastructure MFP if only CCXv5 clients are used.
  2. B
    Client MFP encrypts class 3 unicast management frames using the security mechanisms defined by 802.11i.
  3. C
    In order to use client MFP, the client must support CCXv5 and negotiate WPA2 with AES-CCMP or TKIP.
  4. D
    The only supported method to obtain the pre-user MFP encryption keys is EAP authentication.
  5. E
    The CCXv5 client and access points must discard broadcast class 3 management frames.

Correct Answer:
AD

Question #48
Company XYZ has a wireless network in place. Which three general guidelines should be followed to overlay a Cisco Context-Aware Mobility Solution? (Choose three.)
  1. A
    The maximum effective AP spacing should be between 40 feet and 70 feet.
  2. B
    There should be a minimum of two APs within range of each client.
  3. C
    APs at the perimeter of the coverage area need to be deployed.
  4. D
    The physical placement of APs must be collinear.
  5. E
    Equilateral triangle placement of the APs yields better accuracy.

Correct Answer:
ACE

Question #49
You are designing a wireless infrastructure for an enterprise customer in the busy international banking district of Tokyo. All the client adapters are fairly modern, so you have turned off 802.11b speeds to reduce the size of your cells. Which channels will you choose to make optimum use of the available spectrum?
  1. A
    1, 5, 9, 13
  2. B
    1, 6, 11
  3. C
    1, 6, 11, 14
  4. D
    1, 4, 7, 11, 14
  5. E
    1, 5, 9

Correct Answer:
B

Question #50
Which three are equivalent forms of the IPv6 address 2011:0000:0000:0000:2010:0000:0000:000F? (Choose three.)
  1. A
    2011:0:0:0:2010:0:0:F
  2. B
    2011::2010::000F
  3. C
    2011:0:0000:0000:2010::000F
  4. D
    2011::2010:0:0:F
  5. E
    2011::201:0000:0000:000F
  6. F
    2011::201:0010:0010:000F

Correct Answer:
ACD

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