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NEW QUESTION # 11
A customer needs a networking solution that supports their Microsoft Skype for Business Unified Communications (UC) solution. The architect discovers that user wireless devices are Wi-Fi Multimedia (WMM) capable. Windows policies assign voice traffic DSCP 46 and video traffic DSCP 34.
Which potential issue should the architect explain to the customer about the default QoS settings?
- A. The Aruba APs and controllers use different prioritization mechanism from WMM, so they will not accept high priority traffic from the wireless devices.
- B. DSCP is incompatible with WMM. The Aruba APs and controllers instead use 802.1p to mark traffic to and from wireless devices.
- C. The DSCP values place both voice and video traffic in the video VMM queue, so voice does not receive the prioritization that is should.
- D. The DSCP for wireless client traffic is concealed within the GRE packet on the path from the AP to the controller, and does not take effect.
Answer: C
Explanation:
DSCP (Differentiated Services Code Point) is a method of marking network packets with different priorities based on the type of traffic they carry. DSCP values range from 0 to 63, with higher values indicating higher priority. DSCP values are typically mapped to one of the four WMM (Wi-Fi Multimedia) queues, which are used to prioritize wireless traffic on the access points and controllers. WMM queues are: voice, video, best effort, and background12.
The default QoS settings for Aruba APs and controllers map the DSCP values to the WMM queues as follows3:
Table
DSCP Value
WMM Queue
0-7
Background
8-23
Best Effort
24-39
Video
40-63
Voice
According to these settings, the DSCP values 46 and 34, which are assigned to voice and video traffic by Windows policies, will both be mapped to the video WMM queue. This means that both types of traffic will receive the same priority, and voice traffic will not receive the highest priority that it should. This can result in poor voice quality, increased latency, jitter, or packet loss, especially when the network is congested or bandwidth is limited. Voice traffic is more sensitive to these factors than video traffic, and requires strict QoS to ensure optimal performance and user experience4.
To avoid this potential issue, the architect should explain to the customer that they need to modify the QoS settings on the Aruba APs and controllers to match the DSCP values assigned by Windows policies. This can be done by using the following commands on the Aruba controller3:
(config) #wmm traffic-management-profile voice
(config) #dscp 46
(config) #wmm traffic-management-profile video
(config) #dscp 34
These commands will map the DSCP value 46 to the voice WMM queue, and the DSCP value 34 to the video WMM queue, ensuring that voice traffic receives the highest priority and video traffic receives the second highest priority. This will improve the QoS for the Skype for Business UC solution and enhance the end-user experience.
References:
1:
https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/1-overview
2:
https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/1-overview
3:
https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/1-overview
4:
https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/1-overview
NEW QUESTION # 12
Refer to the exhibit.
The exhibit shows the current plan for a wired network upgrade.
As much as possible, the customer wants to flatten the architecture and avoid recabling. However, each Building 2 switch must also maintain connectivity to the core if one link fails. What should the architect propose to meet the customer requirements?
- A. Connect each Building 2 switch directly to the core on a single fiber strand through the use of SFP+-SR transceivers.
- B. Extend additional fiber between the buildings so that each Building 2 switch can have a direct 10 GbE connection to the core.
- C. Combine the switches in each Building 2 closet as a VSF fabric; establish two 10 GbE connections to the core per fabric.
- D. Use two additional 2930F switches to act as an aggregation layer for Building 2; connect them to the core on 40 GbE connections.
Answer: C
NEW QUESTION # 13
What should an architect use as a guideline to determine when to define another VLAN for wireless devices?
- A. the employee roles, with a different VLAN for each role or department
- B. the WLAN or SSID, with a different VLAN for each SSID
- C. the number of devices, with a different VLAN for each 250 devices
- D. the AP deployment, with a different VLAN for each AP that is deployed
Answer: A
Explanation:
The guideline for defining another VLAN for wireless devices should be based on the employee roles, with a different VLAN for each role or department. This approach allows for better control and management of network resources. It also enhances security by segregating network traffic based on roles or departments. This is particularly useful in large organizations where different departments may have different network requirements and security levels12.
References:
Configuring VLANs - Aruba
TECH BRIEF SINGLE VLAN DESIGN FOR WIRELESS LAN - Aruba
NEW QUESTION # 14
A customer needs an 802.11ac upgrade for an office with cubicles. The customer states that, because they planned locations for the existing 802.11n APs so that there are no coverage holes, they will simply deploy the new 802.11ac APs in the same location as the existing APs. The customer plans to support mobile devices in addition to laptops.
What should the architect explain about shy a site survey is desirable to determine the optimal locations for the new APs?
- A. An 802ac deployment typically works better with side-mounted, rather than ceiling-mounted, APs, and a site survey will help determine the new mounting locations.
- B. The new 802.11ac deployment should have a capacity-based design for the best performance, but the existing deployment sounds like a coverage-based design.
- C. 802.11ac AP radios tend to be more sensitive to 2.4 GHz interference than 802.11n APs, so the architect needs to search for all potential sources of such interference.
- D. 802.11ac APs can support a higher density of clients, so they can be deployed farther apart than the APs in most existing 802.11n deployments.
Answer: A
NEW QUESTION # 15
A customer has very high availability requirements for wireless services. The architect plans to implement clustering on several Aruba Mobility Controllers (MCs). Which benefit of this feature should the architect explain?
- A. Clustering enables an AP with a failed MC to operate on its own briefly to ensure seamless connectivity.
- B. Clustering provides high stability because one MC is active for all sessions and one is standby for all sessions.
- C. Clustering enables an AP with a failed MC to reconnect to a new AP after a short bootstrap.
- D. Clustering provides wireless client load balancing and seamless failover for client sessions.
Answer: B
NEW QUESTION # 16
Refer to the exhibit.
A customer wants to replace the core and aggregation layer of an existing network. Currently the network routes between the aggregation layer and core, and uses the technologies shown in the exhibit.
The customer now wants to route at the core, instead of the aggregation layer, and extend some of the same VLANs in different buildings. However, the customer cannot eliminate the aggregation layer at this point.
What should the architect recommend?
- A. Combine all switches in the aggregation layer and core into a single backplane stack.
- B. Create a backplane stack at the aggregation layer and a VSF fabric at the core.
- C. Implement broadcast filtering on switch-to-switch links across all of the buildings.
- D. Use VRRP on the core and aggregation switches, with the aggregation switches acting as standby.
Answer: B
Explanation:
To route at the core and extend some of the same VLANs in different buildings, the architect should recommend creating a backplane stack at the aggregation layer and a VSF fabric at the core. A backplane stack is a logical switch that combines multiple physical switches into a single unit, using dedicated stacking cables or ports. A VSF fabric is a virtual switch that combines multiple physical switches into a single unit, using standard Ethernet links. Both technologies provide high availability, scalability, and simplified management for the network12.
By creating a backplane stack at the aggregation layer, the architect can reduce the number of routing interfaces and routing protocols needed at the core layer, as well as simplify the configuration and maintenance of the aggregation switches. By creating a VSF fabric at the core layer, the architect can enable Layer 2 connectivity across different buildings, as well as provide redundancy and load balancing for the core switches. The VSF fabric can use Multi-Chassis Link Aggregation (MC-LAG) to extend the same VLANs to different aggregation stacks, without creating loops or blocking ports3.
The other options are not suitable for the customer's requirements. Implementing broadcast filtering on switch-to-switch links across all of the buildings would not enable Layer 2 connectivity across different buildings, as it would prevent the propagation of Layer 2 control traffic, such as Spanning Tree Protocol (STP) and VLAN Trunking Protocol (VTP). Combining all switches in the aggregation layer and core into a single backplane stack would not be feasible, as it would require compatible switches and sufficient stacking ports or cables, as well as create a single point of failure for the entire network. Using VRRP on the core and aggregation switches, with the aggregation switches acting as standby, would not eliminate the routing at the aggregation layer, as it would still require the aggregation switches to participate in the routing process and maintain routing tables.
References:
ArubaOS-Switch Stacking Guide
ArubaOS-Switch Virtual Switching Framework Configuration Guide
Aruba Validated Reference Design: Campus Wired LAN
NEW QUESTION # 17
A customer needs a solution to terminate VPN tunnels for Aruba RAPs. The customer has a single site and a single public IP address for this purpose. Network address translation (NAT) will forward the IPsec traffic to the correct device to terminate the VPN tunnel. The customer also requires N+1 redundancy for the solution.
Which solution meets the customer requirements?
- A. two Aruba MCs on different subnets that use VRRP without clustering
- B. two Aruba MCs on the same subnet that use VRRP without clustering
- C. two Aruba MCs deployed as a Layer 3 cluster
- D. two Aruba MCs deployed as a Layer 2 cluster
Answer: C
NEW QUESTION # 18
An architect needs to plan a wireless deployment. The architect conducts a physical walkthrough, but still
needs more information. Which significant RF obstacle can be difficult to see visually and might require
access to blueprints?
- A. ceiling tiles
- B. metal firewall
- C. fiberglass
- D. drywall
Answer: C
NEW QUESTION # 19
An architect needs to plan a wireless deployment. The architect conducts a physical walkthrough, but still needs more information. Which significant RF obstacle can be difficult to see visually and might require access to blueprints?
- A. ceiling tiles
- B. metal firewall
- C. fiberglass
- D. drywall
Answer: C
NEW QUESTION # 20
Refer to the exhibit. What is one reason for an architect to recommend the use of Virtual Switching Framework (VSF) in this network?
- A. VSF simplifies the topology and eliminates the need for spanning tree.
- B. VSF transforms switches into virtual extensions of the MCs to simplify MST management.
- C. VSF enables software-defined network monitoring in conjunction with AirWare.
- D. VSF enables administrators to manage all 18 switches as a single switch.
Answer: A
NEW QUESTION # 21
Refer to the exhibit.
The customer requires fast failover if any one link or core device fails. Which additional technology should the architect plan on the core VSF fabric to meet these criteria?
- A. OSPF graceful restart
- B. BGP
- C. SmartLink
- D. VRRP
Answer: B
NEW QUESTION # 22
Refer to the exhibit.
The customer needs to expand its wired and wireless network to a new building, Building 2, which is near the existing building, Building 1. The exhibit shows the logical plan that the architect has created so far.
The aggregation layer switches in the new building should provide the default gateway services for the VLANs in the new building and route traffic to the core. The existing Aruba Mobility Controllers (MCs) will control the new APs.
What should be the VLAN assignment for Link 1, indicated in the exhibit?
- A. an unused VLAN such as 200
- B. the default VLAN and VLAN 14
- C. VLANs 21, 22, and 23 only
- D. VLANs 11, 12, 13, 21, 22, and 23
Answer: D
NEW QUESTION # 23
A customer needs a wired network solution that can recognize and prioritize a wide array of different types of
traffic, including casual Web browsing, voice, video, SAP Online, and file sharing.
The architect needs to choose between the Aruba 2930F or the 2540 Switch Series for the access layer switch.
Why would the architect choose the 2930F rather than the 2540 Switch Series for this customer?
- A. The 2930F Series can provide better congestion management with its much deeper buffers.
- B. The 2930F Series supports LLDP-MED for detecting VoIP traffic, while the 2540 Series does not.
- C. The 2930F Series supports advancing routing, including multi-area OSPF, while the 2540 Series does
not. - D. The 2930F Series supports more options for class-based QoS policies that the 2540 Series.
Answer: A
NEW QUESTION # 24
A customer currently has an Instant AP deployment. Which customer requirement would indicate that the
customer needs to add a controller to the deployment?
- A. the requirement to apply role-based firewall policies
- B. the requirement for a captive portal for guests
- C. the requirement for a cloud-based management solution
- D. the requirement to provide client-to-site VPN acces for remote users
Answer: C
NEW QUESTION # 25
Refer to the exhibit.
An architect selects 5406R switches for the aggregation layer. What is an appropriate amount of bandwidth for the link aggregation between each aggregation layer VSF fabric and the campus core?
- A. 320 Gbps
- B. 160 Gbps
- C. 60 Gbps
- D. 200 Gbps
Answer: D
NEW QUESTION # 26
A customer requires high availability for wireless services, including stateful failover for user connections if the Mobility Controller (MC) that handles the user traffic fails. What is the requirement for the design?
- A. MCs have enough licenses to support the APs for which they are active and standby MC.
- B. MCs have a standby master IP address assigned to them.
- C. MCs are distributed across each VLAN on which APs are deployed and have VRRP enabled.
- D. MCs are deployed in a cluster, and they are on the same VLAN
Answer: C
NEW QUESTION # 27
Refer to the exhibit.
What is one reason for an architect to recommend the use of Virtual Switching Framework (VSF) in this network?
- A. VSF simplifies the topology and eliminates the need for spanning tree.
- B. VSF transforms switches into virtual extensions of the MCs to simplify MST management.
- C. VSF enables software-defined network monitoring in conjunction with AirWare.
- D. VSF enables administrators to manage all 18 switches as a single switch.
Answer: A
NEW QUESTION # 28
A customer has a small office building that needs approximately 32 APs. The solution must support basic rogue AP detection and provide a stateful firewall with role-based policies. The customer would like the simplest, most cost-effective deployment that meets their needs.
What should the architect recommend?
- A. Aruba remote APs
- B. Aruba Instant APs
- C. Aruba campus APs and an Aruba 7005 Mobility Controller
- D. Aruba campus APs and a Virtual Mobility Controller
Answer: C
NEW QUESTION # 29
An architect plant to purpose an Aruba wireless solution with several Mobility Controllers (MCs) and a Mobility Master (MM) architecture. Wireless users run Skype for Business, a Unified Communications (UC) solution. The architect plans to use the Aruba SDN capabilities to integrate with the UC solution.
What helps to support high availability specifically for the SDN services?
- A. backup controllers defines on the APs
- B. a redundant master MC
- C. a redundant MM
- D. a cluster deployment for MCs
Answer: C
NEW QUESTION # 30
A customer needs a solution to terminate VPN tunnels for Aruba RAPs. The customer has a single site and a single public IP address for this purpose. Network address translation (NAT) will forward the IPsec traffic to the correct device to terminate the VPN tunnel. The customer also requires N+1 redundancy for the solution.
Which solution meets the customer requirements?
- A. two Aruba MCs on different subnets that use VRRP without clustering
- B. two Aruba MCs on the same subnet that use VRRP without clustering
- C. two Aruba MCs deployed as a Layer 3 cluster
- D. two Aruba MCs deployed as a Layer 2 cluster
Answer: C
Explanation:
Explanation
NEW QUESTION # 31
Which benefit does Aruba AirWare Clarity provide to customer IT staff?
- A. provides insight into the security posture of clients connected to the network, whether wired or wireless
- B. maps all network devices, including APs, MCs, switches, and client devices, and provides information
about each node - C. create a heat map of RF coverage, shows places with interfaces, and helps staff pinpoint the interference
source - D. assesses times for clients to obtain DHCP and DNS services to help staff diagnose non-WiFi related
issues
Answer: D
NEW QUESTION # 32
An architect needs to plan the bandwidth for two Aruba 7240 Mobility Controllers (MCs) which will connect to the network core. The customer indicates that four 10 GbE links between the network core and the data center will be adequate. The customer expects almost all traffic in the network will be wireless. The customer expects up to 25 Gbps upstream traffic from wireless clients and up to 35 Gbps downstream to wireless clients. The customer requires the MCs to be able to continue to forward traffic if up to one link fails, but lower performance during the failover situation is permissible.
What are the minimal links to meet these requirements?
- A. two 10 GbE links on each of the MC
- B. three 10 GbE links on each of the MCs
- C. four 10 GbE links on each of the MCs.
- D. two 40 GbE links in each of the MCs
Answer: D
NEW QUESTION # 33
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HP HPE6-A47 (Aruba Certified Design Professional) certification exam is a valuable certification for network professionals who want to enhance their skills and knowledge in designing and deploying Aruba WLAN solutions. Aruba Certified Design Professional Exam certification exam validates the skills and expertise of network professionals in WLAN design theory, RF planning, security, and troubleshooting. Aruba Certified Design Professional Exam certification is recognized globally and provides professionals with a competitive advantage in the job market.
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