Cisco 400-351 Online Practice Questions and Exam Preparation

Cisco 400-351 Online Questions & Answers

• Question 421:

  Which two platforms provide hypervisor virtualization? (Choose two.)

  A. DevStack
  B. Docker
  C. KVM
  D. OpenStack
  E. Xen
  C. KVM
  E. Xen

• Question 422:

  Which two statements regarding the Service Discovery Gateway feature are true? (Choose two.)

  A. Service Discovery Gateway is not aimed at enhancing bring your own device.
  B. All network segments must be connected directly to the Service Discovery Gateway.
  C. The Service Discovery Gateway can learn services from a single connected segment to build its cache and respond to requests acting as a proxy.
  D. The Service Discovery Gateway supports topologies with multiple hops.
  E. The Service Discovery Gateway feature enables multicast domain name system to operate across Layer 3 boundaries.
  C. The Service Discovery Gateway can learn services from a single connected segment to build its cache and respond to requests acting as a proxy.
  E. The Service Discovery Gateway feature enables multicast domain name system to operate across Layer 3 boundaries.

• Question 423:

  A corporation is designing a wireless network that must provide VoWLAN services on the 5 GHz band. They plan to use their existing Cisco 5520 WLC, AIR-CAP3702I-A-K9 Aps, and Cisco 8821 wireless IP phones which, based on the phone specifications, have a maximum transmit power of 14 dBm. The network engineer performed a site survey with an AIR-CAP3702I-A-K9 AP operating at a 100 mW on the 5 GHz band, and using UNII-I channels only for cell planning. His survey report identified that they have sufficient coverage on the site, and overlap between cells was 15-20%. However, after deployment, users report that sometimes they have one-way audio problems while moving around the floor. Which is the root cause of the problem?

  A. Cell overlap is not sufficient for seamless roaming, and that leads to the problem with phone conversations when users are walking around the site while on a call.
  B. During the survey phase, the network engineer had to configure the survey AP to operate at 25 mW to ensure proper coverage.
  C. This problem happens because DFS channels were used for planning.
  D. This problem happens due to co-channel interference (CCI) because only four channels were used for cells planning.
  D. This problem happens due to co-channel interference (CCI) because only four channels were used for cells planning.

• Question 424:

  Which two statement about local profiling on a Cisco WLC running AireOS are true? (Choose two)

  A. Profiling is performed on IPV4 and IPV6 client.
  B. When local profiling is enabled , RADIUS profiling is allowed.
  C. Wired clients behind the workgroup bridge are profiled and a policy action is taken
  D. Profiling is performed only on IPV4 clients.
  E. Wired clients behind the workgroup bridge are not profiled and no policy action is taken.
  D. Profiling is performed only on IPV4 clients.
  E. Wired clients behind the workgroup bridge are not profiled and no policy action is taken.

• Question 425:

  Refer to the exhibit.

  

  Your company recently replaced their old wireless access points (AIR-AP1242G) with AIR-AP2802i models. However, after replacement, not all SSIDs are visible by end users. After some troubleshooting you see that not all SSIDs are in UP state under the radio interfaces. Which cause of the problem reported by end users is most likely?

  A. The AIR-AP1242G requires only 15.4 W of power, but the AIR-AP2802I requires above 26.5 W to be fully operational, so only certain SSIDs are being broadcasted.
  B. The corresponding SSIDs were not added to the respective AP groups after a hardware replacement.
  C. The missing SSIDs are in disabled state on the WLC and must be re-enabled.
  D. The missing SSIDs have been configured with an unsupported encryption type.
  A. The AIR-AP1242G requires only 15.4 W of power, but the AIR-AP2802I requires above 26.5 W to be fully operational, so only certain SSIDs are being broadcasted.

• Question 426:

  Two autonomous Aps are connected to a switch on the same VLAN both APS are configured with the same SSID and WPA2-PSK. After making configuration changes to one of the APs .spanning tree disabled one of the switch ports into which AP was plugged.? Which two options describe possible reasons that spanning tree disabled a port? (choose Two)

  A. One of the Aps was configured as a universal workgroup bridge.
  B. It is not possible for spanning tree to disable a port. The bridging loop must have been coincidental
  C. Spanning tree was disabled on both Aps
  D. PortFast was enabled on all ports
  E. One of the APs was configured as a standard workgroup bridge.
  A. One of the Aps was configured as a universal workgroup bridge.
  E. One of the APs was configured as a standard workgroup bridge.

• Question 427:

  Which two statements about 802.11ac wireless LAN technology are true? (Choose two.)

  A. Antenna design does have to change because 802.11ac occupies different spectrum as 802.11a and 802.11n at 5 GHz
  B. The 802.11ac IEEE standard allows for theoretical speeds up to 6.9 Gbps in the 5 GHz band, which is 11,5 times those of 802.11n
  C. The 802.11ac standard defines downlink and uplink MU-MIMO, which is for the access point sending to multiple clients concurrently and for multiple clients coordinating to transmit separate packets to the access point at the same time
  D. The 802.11ac Wave 2 standard limits itself to communicating with a maximum of four clients at a time, using up to a total of eight spatial streams (for all clients) or a maximum of four spatial streams per client in a MU-MIMO transmission
  E. Client MU-MIMO (802.11ac Wave 2) can be achieved easily via software upgrade assuming the client is at least 802.11ac Wave 1 compatible
  B. The 802.11ac IEEE standard allows for theoretical speeds up to 6.9 Gbps in the 5 GHz band, which is 11,5 times those of 802.11n
  C. The 802.11ac standard defines downlink and uplink MU-MIMO, which is for the access point sending to multiple clients concurrently and for multiple clients coordinating to transmit separate packets to the access point at the same time

• Question 428:

  Refer to the exhibit. An access point cannot join the Wireless LAN Controller when plugged to interface GigabitEthernet1/0/2. When the same access point is moved to interface GigabitEthernet1/0/1, the problem does not occur. What is the reason for this problem?

  

  A. GgabitEthernet1/0/2 is set as span session destination.
  B. GgabitEthernet1/0/2 is still participating in Spanning Tree Protocol.
  C. GgabitEthernet1/0/2 is set as portfast.
  D. The switch is experiencing a hardware failure and it must be rebooted.
  C. GgabitEthernet1/0/2 is set as portfast.

• Question 429:

  Which action is needed to edit the settings of an RF profile?

  A. Disable both radio networks
  B. Disable custom power level settings for all APs within the group to which the profile is linked.
  C. Remove the desired RF profile from all AP groups
  D. RF profiles cannot be edited. They must be removed and recreated with the desired values.
  C. Remove the desired RF profile from all AP groups

• Question 430:

  Which two configurations are required on the Cisco 5760 WLC to ensure that APs will successfully join the Cisco WLC? (Choose two)

  A. Ensure accurate configuration of the correct time and date on the wireless LAN controller.
  B. Enable ip dhcp snooping trust on the wireless controller port-channel interface.
  C. Ensure that Port-Fast is enabled on each access point switch port.
  D. Activate the appropriate Right-to-Use AP license on the wireless LAN controller.
  A. Ensure accurate configuration of the correct time and date on the wireless LAN controller.
  D. Activate the appropriate Right-to-Use AP license on the wireless LAN controller.