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Cisco ENWLSD 300-425 EP > EP Review > Flashcards

EP Review Flashcards

1
Q

An engineer is designing a wireless network that will support many different types of wireless clients. When conducting the survey, which client must be used to ensure a consistent experience for all of the wireless clients? True/False

  • The client/user that is used most by the company
A

True

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2
Q

Which two criteria must be considered when conducting an outdoor bridge site survey? True/False

  • Fresnel Zone and powerlines
A

True

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3
Q

An engineer is performing a predictive wireless design for a medical treatment environment, which requires data and voice services. What is the minimum requirement for the design? True/False

Continuous -67 dBm coverage for one access point

A

True

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4
Q

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? True/False

-85 dBm to -67 dBm

A

True

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5
Q

A wireless engineer is designing a wireless network to support real-time applications over wireless. Which IEEE protocol must the engineer enable on the WLC so that the number of packets that are exchanged between an access point and clients are reduced and fast roaming occurs? True/False

  • 802.11k
A

True

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6
Q

A network administrator of a global organization is collapsing all controllers to a single cluster located in central Europe. Which concern must be addressed? True/False

Syslog must be configured to the time-zone of the NMS platform

A

True

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7
Q

A wireless engineer is hired to design a network for a technology company. The company campus has four building and a warehouse with access points that provide full wireless coverage as well as a pair of WLCs located in the core of the network. Which type of wireless architecture is being used? True/False

Centralized deployment

A

True

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8
Q

Where must the APs be mounted when used in a high-density wireless network to provide 6 dB to 20 dB of attenuation to a cell? True/False

Under the seat

A

True

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9
Q

A wireless network consultant must assess an existing wireless LAN controller. Which section must the consultant check before replacing the old AP’s with AP’s that are IEEE 802.11ac-capable? True/False

Number of AP licenses

A

True

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10
Q

A technician connects a Cisco Aironet 3700 Series access point to a switch and realizes that the AP is coming up with 3x3 MIMO. What reason explains this behavior? True/False

Switch is POE+ capable 802.3at

A

True

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11
Q

A network engineer is working on a design for a wireless network that must support data, voice and location services. To support these services, which access point placement must the engineer use? True/False

  • Perimeter only
A

True

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12
Q

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

  • Interface groups
A

True

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13
Q

An engineer has deployed a group of AP’s in an auditorium and notices that the AP’s are showing high co-channel interference. Which profile can be used to adjust the parameters for these high-density AP’s? True/False

RF Profile

A

True

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14
Q

A university is in the process of designing a wireless network in an auditorium that seats 500 students and supports student laptops. Which design methodology should the university implement in the auditorium? True/False

High-density design model

A

True

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15
Q

A customer asks an engineer to explain the concept of mobility domains and mobility groups. Which statement does the engineer respond with? True/False

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.

A

True

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16
Q

An engineer must ensure that the new wireless LAN deployment can support seamless roaming between access points using a standard based on an amendment to the 802.11 protocol. Which protocol must the engineer select? True/False

  • 802.11r
A

True

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17
Q

A client roams between two AP’s 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? True/False

Controllers exchange mobility control messages (over UDP port 16666) and the client database entry is moved from the original controller to the new controller.

A

True

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18
Q

An engineer has configured a guest anchoring for a newly created SSID however the mobility tunnels are not up and EPING is failing from the foreign WLC to the anchor WLC. Which traffic flow must be allowed at the firewall to enable the communication? True/False

UDP port 16666

A

True

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19
Q

Which statement about creating a mobility group is true excluding mobility anchors? True/False

If WLC with HA SSO are deployed each WLC in the WLC HA pair is considered separately as a mobility peer

A

True

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20
Q

Which two considerations must a network engineer have when planning for voice over wireless roaming? True/False

Full re-authentication introduces gaps in the voice conversation

Roaming with only 802.1x authentication requires full re authentication.

A

True

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21
Q

Which statement about the 9800 Series Wireless Controller mobility tunnel on a Cisco Catalyst 9800 controller is true? True/False

It is a CAPWAP tunnel with control and data path

A

True

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22
Q

An engineer must configure the virtual IP address on multiple controllers in a mobility group. Which rule must the engineer follow to ensure proper roaming? True/False

Ensure that the DNS entry is tied to the virtual IP address of the WLC

A

True

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23
Q

Guest anchoring is configured for a newly created SSID for your company. It has been noticed that the mobility tunnels are not up and MPING fails from your foreign WLC to the anchor WLC. What is the reason that it is failing? True/False

A rule is needed at the firewall to allow UDP port 16666 for communication to work

A

True

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24
Q

Multiple WLC are implemented in a high-availability configuration in a mobility group. AP’s are deployed with only a primary controller assigned. By default which mobility group member controller do the orphaned AP’s join in the event of a failed controller? True/False

Controller with the least number of associated AP’s

A

True

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25
Q

An engineer must ensure that the wireless network can accomplish 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? True/False

OKC (Opportunistic Key Caching)

A

True

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26
Q

A customer is running a guest WLAN with a foreign/export-anchor setup. There is one anchor WLC in the US and two in Europe. Anchor WLC priorities are used to prefer local anchors. During a routine network audit, it is discovered that a large number of guest client sessions in the US are anchored to the WLC in Europe. Which reason explains this behavior? True/False

The US anchor WLC failed and recovered

A

True

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27
Q

A customer has two Cisco 5508 WLCs that mange all the access points in their network and provide N+1 redundancy and load balancing. The primary Cisco WLC has 60 license and the secondary WLC has 40. The customer wants to convert the N+1 model to an HA model and provide SSO. Configuration must be performed during a maintenance window. After performing all the configurations on both controllers, the config redundancy unit secondary command is issued on the secondary Cisco WLC and it fails. Which parameter needs to be in place to complete this configuration? True/False

The secondary Cisco WLC needs a minimum of 50 base license

A

True

28
Q

An engineer must create data-link redundancy for the company Cisco Wireless LAN Controller. The engineer has decided to configure LAG-based redundancy instead of port-based redundancy. Which features of LAG-based redundancy influenced this decision? True/False

Packets are always sent out the same port they are received on

All interface traffic passes as long as one port is up

Ports are grouped into multiple LAGs

A

True

29
Q

A wireless engineer must optimize RF performance for multiple buildings with multiple types of construction and user density. Which two actions must be taken? True/False

  • Configure AP groups & RF Profiles for each area type
A

True

30
Q

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

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 a primary controller failure.

A

True

31
Q

A company has 10 access point license available on their backup Cisco WLC and their primary Cisco WLC is at full capacity. 5 access points are set to high fail over priority and 7 access points are set to critical fail over priority. During a failure not all critical access points failed over to the backup Cisco WLC. Which configuration is the cause of this issue? True/False

The high priority access point is oversubscribed

A

True

32
Q

A network engineer is configuring high availability on an access point. What is the maximum number of controllers that be configured? True/False

2

A

True

33
Q

What is the layer 1 sweep mode for the AP when using Channelizer with no WI-Fi, RF or spectrum data or activity? True/False

SE-Connect Mode

A

True

34
Q

IP surveillance camera AP mode outdoor in a mesh uses ethernet to MAP Mesh network? True/False

A

True

35
Q

3X3 MIMO by default is POE+ capable 802.3at? True/False

A

True

36
Q

Auditorium are high-density with AP being placed under the seats for better coverage? True/False

A

True

37
Q

Human body signal attenuation is 3dB? True/False

A

True

38
Q

Cisco 9800 WLC has OKC enabled by default (Opportunistic Key Caching)? True/False

A

True

39
Q

Location-ready design - Perimeter and corner access point placement is very important for good location accuracy? True/False

A

True

40
Q

Interface groups are logical groups of interfaces enables you to associate a client to specific subnets based on the foreign controller that they are connected to. The anchor controller WLAN can be configured to maintain a mapping between foreign controller MAC and a specific interface or interface group (Foreign maps) as needed. True/False

A

True

41
Q

RF Profiles allows you to tune groups of APs that share a common coverage zone together and selectively change how RRM will operates the APs within that coverage zone.

Such as university might deploy a high density of APs in an area where a high number of users will congregate or meet. This situation requires that you manipulate both data rates and power to address the cell density while managing the co-channel interference? True/False

A

True

42
Q

Cisco HA SSO condition only valid for the 5508 WLC needs a minimum of 50 AP Permanent licenses are needed to be converted to Standby? True/False

A

True

43
Q

A High Availability (HA) deployment is made up of two Controllers, one in the role of the primary and the other as the secondary? True/False

A

True

44
Q

Line of Sight (LoS)

Near-Far Effect - The near far problem is a condition in which a receiver captures the strong signal and hence make it difficult for the receiver to detect a weaker signal.

Fresnel Zone is a cigar-shaped area centered on a point-to-point communication link

True/False

A

True

45
Q

Anchor/Foreign Controller if any of the anchor controller is detected to be down, all the clients anchored to the controller are deauthenticated, and the clients then go through the authentication/anchoring process again in a round-robin manner with the remaining controller in the anchor list? True/False

A

True

46
Q

Clean Air Modes

Local is air quality and interference detection reports for the current operating channel only.

True/False

A

True

47
Q

Clean Air Modes

Monitor is air quality and interference detection reports for all monitored channels.

True/False

A

True

48
Q

Clean Air Modes

SE-Connect - enables a user to connect a Spectrum Expert application and does not provide any Wi-Fi, RF, or spectrum data to the switch

True/False

A

True

49
Q

The kind of antenna you would use in a warehouse is a patch antenna? True/False

A

True

50
Q

802.11n/ac Data-Only Applications wireless deployment guidelines? True/False

  • Casual wireless access (no primary access)
  • Low-bandwidth data applications (email, web, file access)
  • AP installed every 82 feet (example)
  • Always use dual-radio AP’s (2.4Ghz and 5Ghz)
  • Location accuracy will be reduced
A

True

51
Q

802.11n/ac Data & Voice Applications wireless deployment guidelines? True/False

  • High-density wireless access (primary access)
  • Simultaneous VoIP and data usage
  • AP installed every 59 feet (example)
  • Always use dual-radio AP’s (2.4Ghz and 5Ghz)
  • Location accuracy will be increased depending on placement
A

True

52
Q

5Ghz VoWLAN is best for running voice of Wireless LAN with the least interference in a high density design? True/False

A

True

53
Q

TCP is a connected-oriented protocol where data is resent and verified and is also resistant to RF condition degradation? True/False

A

True

54
Q

UDP is a connection-less protocol used for real-time applications because there no interest in re-sending data again? True/False

A

True

55
Q

In a 5Ghz network design the minimum recommended data rate is 12 Mbps. True/False

A

True

56
Q

Duty cycles is the time during which a given transmitter is transmitting and is measured as a percentage of total time available and relates directly to channel utilization? True/False

A

True

57
Q

In WLAN WI-Fi uses a band plan that breaks up available spectrum’s into a group of non-overlapping channels. A channel represents a cell; a cell represents a single continuous collusion domain? True/False

A

True

58
Q

Location, Voice, Video and Data Design

  • Use Cisco 802.11n/ac compliant dual-band AP’s
  • Design the voice WLAN on 5Ghz band to support Cisco IP Phone handsets and high-speed client devices.
  • Design 2.4Ghz band for legacy voice and data devices and active RFID asset tags that are compatible with CCE
  • 67 dBm cell edges
  • Survey for VoWLAN and video and then add any additional AP’s as monitoring to fill in for location services.
A

True

59
Q

N+1
Active WLC / Standby WLC (backup)

True/False

A

True

60
Q

1:1
HA Active WLC / Active WLC (Hot Standby)

  • Load sharing and continuous health monitoring of the Active WLC via a redundancy port.
  • Both WLCs share same set of configurations including the IP address of the Management interface.
  • WLC in Standby state does not need to be configured independently entire configuration will be synced from Active WLC to Standby WLC via a Redundant Port.
  • The AP’s CAPWAP State are synced and a mirror copy of AP database is maintained on Standby WLC. APs do not go into the Discovery state when Active WLC fails and Standby WLC takes over the network’s Active WLC.

True/False

A

True

61
Q

HA High Availability Design it’s highly recommended to have back-to-back direct connectivity between Redundant Ports? True/False

A

True

62
Q

With Client SSO, a client’s information is synced to the Standby WLC when the client associates to the WLC or the client’s parameters change. Client re-association is avoided on switchover making the failover seamless for the APs as well as for the clients, resulting in zero client service downtime and no SSID outage? True/False

A

True

63
Q

Once SSO is enabled, the Standby WLC can be accessed via console connection or via SSH on the service port and on the redundant management interface? True/False

A

True

64
Q

FlexConnect (previously known as Hybrid Remote Edge Access Point or H-REAP) is a wireless solution for branch office and remote office deployments. It enables customers to configure and control access points in a branch or remote office from the corporate office through a wide area network (WAN) link without deploying a controller in each office? True/False

A

True

65
Q

FlexConnect access points can switch client data traffic locally and perform client authentication locally when their connection to the controller is lost. When they are connected to the controller, they can also send traffic back to the controller. In the connected mode, the FlexConnect access point can also perform local authentication? True/False

A

True

Cisco ENWLSD 300-425 EP (2 decks)

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