Question 1

An engineer is reducing the subnet size of the corporate WLAN by segmenting the VLAN into smaller subnets. Clients will be assigned a subnet by location. Which type of groups can the engineer use to map the smaller subnets to the corporate WLAN?

Accepted Answer

A)  WLC port groups 
B)  RF groups 
C)  AP groups 
D)  interface groups

Question 2

An engineer must ensure that the wireless network accomplishes fast, secure roaming by way of caching keys on the access points. Which key caching mechanism is enabled by default on a Cisco AireOS WLC?

Accepted Answer

A)  SKC 
B)  OKC 
C)  802.11r 
D)  CCKM

Question 3

An engineer has successfully configured high availability and SSO using two Cisco 5508 Wireless LAN Controllers. The engineer can access the Active Primary WLC, but the Secondary Standby WLC is not accessible. Which two methods allow access to the standby unit? (Choose two.)

Accepted Answer

A)  via the console connection 
B)  SSH to the redundancy management interface of the primary WLC 
C)  SSH to the service port interface 
D)  SSH to the virtual interface of the secondary WLC 
E)  SSH to the management interface of the primary WLC

Question 4

When conducting a site survey for real-time traffic over wireless, which two design capabilities of smartphones and tablets must be considered? (Choose two.)

Accepted Answer

A)  no support for 802.11ac 
B)  higher data rates than laptops 
C)  fewer antennas than laptops 
D)  no support for 802.11r 
E)  lower data rates than laptops

Question 5

How does AP failover priority for access points function when configured with priority 1 or 4?

Accepted Answer

A)  When configured with priority 1, the access point is assigned with the highest priority level, and it is marked as critical. This access point fails over before other access points with the lower priority when there is primary controller failure. 
B)  When configured with priority 4, the access point is assigned with the highest priority level, and it is marked as critical. This access point fails over before other access points with the lower priority when there is primary controller failure. 
C)  When configured with priority 4, the access point is assigned with the lowest priority level, and it is marked as low. This access point fails over after other access points with the higher priority when there is primary controller failure. 
D)  When configured with priority 1, the access point is assigned with the medium priority level, and it is marked as medium. This access point fails over after other access points with the higher priority when there is primary controller failure.

Question 6

How should the concept of mobility domains and mobility groups be explained to a customer?

Accepted Answer

A)  A mobility group does not constrain the distribution of security context of a client and also does not constrain AP fail-over between controllers when the WLC is in the same mobility domain. 
B)  If WLCs are in the same mobility domain, they communicate with each other but, if an anchor WLC is present, it must be in the same mobility domain for communication to be possible. 
C)  If WLCs are in the same mobility domain, they communicate with each other. Mobility groups constrain the distribution of security context of a client and also constrain AP fail-over between controllers. 
D)  WLCs do not need to be in the same mobility domain to communicate with each other. Mobility groups constrain the distribution of security context of a client and also constrain AP fail-over between controllers.

Question 7

Which statement about AP failover priority for access points when configured with priority 1 or 4 is true?

Accepted Answer

A)  When configured with priority 1, the access point is assigned with the highest priority level and it is marked as critical. This access point fails over before other access points with the lower priority when there is primary controller failure. 
B)  When configured with priority 4, the access point is assigned with the highest priority level and it is marked as critical. This access point fails over before other access points with the lower priority when there is primary controller failure. 
C)  When configured with priority 4, the access point is assigned with the lowest priority level and it is marked as low. This access point fails over after other access points with the higher priority when there is primary controller failure. 
D)  When configured with priority 1, the access point is assigned with the medium priority level and it is marked as medium. This access point fails over after other access points with the higher priority when there is primary controller failure.

Question 8

Refer to the exhibit. PC A is unable to send data to PC B because the DF bit is set on PC A. Which action corrects the problem?

Accepted Answer

A)  Lower the MSS on PC A. 
B)  Configure QoS on the network. 
C)  Configure PMTUD on the network. 
D)  Configure a GRE tunnel between R1 and R3.

Question 9

A network engineer is working on a predictive WLAN design. The new wireless network must support access to Internet, email, voice, and the inventory database. To successfully support these services, which configuration must the engineer use for the signal strength levels and SNR on the planning tool?

Accepted Answer

A)  signal strength of -67 dBm, 20-dB SNR, and maximum 5 percent packet loss 
B)  signal strength of -70 dBm, 30-dB SNR, and maximum 10 percent packet loss 
C)  signal strength of 67 dBm, 20-dB SNR, and maximum 1 percent packet loss 
D)  signal strength of -67 dBm, 25-dB SNR, and maximum 1 percent packet loss

Question 10

An engineer is designing a wireless network to support high availability. The network will need to support the total number of APs and client SSO. Live services should continue to work without interruption during the failover. Which two requirements need to be incorporated into the design to meet these needs? (Choose two.)

Accepted Answer

A)  controller high availability pair with one of the WLCs having a valid AP count license 
B)  WLC 7.5 code or more recent 
C)  redundant vWLC 
D)  10 sec RTT 
E)  back-to-back direct connection between WLCs

Question 11

A wireless engineer is utilizing the voice readiness tool in Cisco Prime for a customer that wants to deploy Cisco IP phones. Which dBm range is the network inspected against?

Accepted Answer

A)  ?78 to ?65 dBm 
B)  ?72 to ?67 dBm 
C)  ?85 to ?65 dBm 
D)  ?85 to ?67 dBm

Question 12

A wireless engineer is using Ekahau Site Survey to validate that an existing wireless network is operating as expected. Which type of survey should be used to identify the end-to-end network performance?

Accepted Answer

A)  GPS assisted 
B)  spectrum analysis 
C)  passive 
D)  active ping

Question 13

Which UDP port numbers are used for exchange mobility packets in an AireOS wireless deployment?

Accepted Answer

A)  UDP 16666 for control plane, EoIP (IP protocol 97) for data plane 
B)  UDP 16668 for control plane, UDP 16667 for data plane 
C)  UDP 16667 for control plane, UDP 16666 for data plane 
D)  UDP 16666 for control plane, UDP 16667 for data plane

Question 14

An engineer is designing a wireless deployment for a university auditorium. Which two features can be used to help deal with the issues introduced by high AP count? (Choose two.)

Accepted Answer

A)  TSPEC 
B)  RXSOP 
C)  TPC 
D)  LSS 
E)  DFS

Question 15

Prior to enabling PPPoE in a virtual private dialup network group, which task must be completed?

Accepted Answer

A)  Disable CDP on the interface. 
B)  Execute the vpdn enable command. 
C)  Execute the no switchport command. 
D)  Enable QoS FIFO for PPPoE support.

Question 16

A user is having issues accessing file shares on a network. The network engineer advises the user to open a web browser, input a prescribed IP address, and follow the instructions. After doing this, the user is able to access company shares. Which type of remote access did the engineer enable?

Accepted Answer

A)  EZVPN 
B)  Ipsec VPN client access 
C)  VPDN client access 
D)  SSL VPN client access

Question 17

Which two criteria must be considered when conducting an outdoor bridge site survey? (Choose two.)

Accepted Answer

A)  near-far effect 
B)  weather 
C)  traffic lights 
D)  power lines 
E)  Fresnel zone

Question 18

A wireless network consultant must assess an existing wireless LAN controller. Which section must the consultant check before replacing the old APs with APs that are IEEE 802.11ac-capable?

Accepted Answer

A)  number of AP licenses 
B)  controller PSU 
C)  throughput capacity 
D)  software version

Question 19

Refer to the exhibit. A client roams between two APs that are registered to two different controllers, where each controller has an interface in the client subnet. Both controllers are running AireOS. Which scenario explains the client roaming behavior?

Accepted Answer

A)  Controllers exchange mobility control messages (over UDP port 16666) and the client database entry is moved from the original controller to the new controller. 
B)  Controllers do not exchange mobility control messages (over UDP port 16666) and the client database, entry is not moved from the original controller to the new conrtoller. 
C)  Controllers exchange mobility control messages (over UDP port 16666) and a new client session is started with the new controller. 
D)  Controllers exchange mobility control messages (over UDP port 16666) and the client database entry is tunneled from the original controller to the new controller.

Question 20

An enterprise has moved most services to the cloud, including email applications and real-time communication. Which feature must be enabled on the wireless network to improve the user experience?

Accepted Answer

A)  radio management 
B)  fast secure roaming 
C)  QoS 
D)  interference mitigation

Exam 11: Designing Cisco Enterprise Wireless Networks (300-425 ENWLSD)