EP Review Flashcards
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
True
Which two criteria must be considered when conducting an outdoor bridge site survey? True/False
- Fresnel Zone and powerlines
True
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
True
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
True
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
True
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
True
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
True
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
True
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
True
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
True
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
True
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
True
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
True
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
True
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.
True
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
True
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.
True
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
True
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
True
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.
True
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
True
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
True
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
True
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
True
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)
True
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
True
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
True
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
True
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
True
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.
True
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
True
A network engineer is configuring high availability on an access point. What is the maximum number of controllers that be configured? True/False
2
True
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
True
IP surveillance camera AP mode outdoor in a mesh uses ethernet to MAP Mesh network? True/False
True
3X3 MIMO by default is POE+ capable 802.3at? True/False
True
Auditorium are high-density with AP being placed under the seats for better coverage? True/False
True
Human body signal attenuation is 3dB? True/False
True
Cisco 9800 WLC has OKC enabled by default (Opportunistic Key Caching)? True/False
True
Location-ready design - Perimeter and corner access point placement is very important for good location accuracy? True/False
True
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
True
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
True
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
True
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
True
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
True
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
True
Clean Air Modes
Local is air quality and interference detection reports for the current operating channel only.
True/False
True
Clean Air Modes
Monitor is air quality and interference detection reports for all monitored channels.
True/False
True
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
True
The kind of antenna you would use in a warehouse is a patch antenna? True/False
True
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
True
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
True
5Ghz VoWLAN is best for running voice of Wireless LAN with the least interference in a high density design? True/False
True
TCP is a connected-oriented protocol where data is resent and verified and is also resistant to RF condition degradation? True/False
True
UDP is a connection-less protocol used for real-time applications because there no interest in re-sending data again? True/False
True
In a 5Ghz network design the minimum recommended data rate is 12 Mbps. True/False
True
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
True
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
True
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.
True
N+1
Active WLC / Standby WLC (backup)
True/False
True
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
True
HA High Availability Design it’s highly recommended to have back-to-back direct connectivity between Redundant Ports? True/False
True
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
True
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
True
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
True
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
True
