HP HP Certifications HPE7-A01 Questions & Answers

• Question 11:

  What is true regarding 802.11k?

  A. It extends radio measurements to define mechanisms for wireless network management of stations

  B. It reduces roaming delay by pre-authenticating clients with multiple target APs before a client roams to an AP

  C. It provides mechanisms for APs and clients to dynamically measure the available radio resources.

  D. It considers several metrics before it determines if a client should be steered to the 5GHz band, including client RSSI

  Correct Answer: C

  Explanation: 802.11k is a standard that provides mechanisms for APs and clients to dynamically measure the available radio resources in a wireless network. 802.11k defines radio resource management (RRM) functions, such as neighbor reports, link measurement, beacon reports, etc., that allow APs and clients to exchange information about the RF environment and make better roaming decisions. The other options are incorrect because they describe other standards, such as 802.11r, 802.11v, or 802.11ax. References: https://www.arubanetworks.com/assets/wp/WP_WiFi6.pdf https://www.arubanetworks.com/assets/ds/DS_AP510Series.pdf

• Question 12:

  Your customer is having issues with Wi-Fi 6 clients staying connected to poor-performing APs when a higher throughput APs are closer. Which technology should you implement?

  A. Clearpass

  B. ClientMatch

  C. Airmatch

  D. ARM

  Correct Answer: B

  Explanation: Wi-Fi 6 is an industry certification for products that support the new wireless standard 802.11ax, also known as "high-efficiency wireless". Wi-Fi 6 offers increased capacities, improved resource utilization and higher throughput speeds than previous standards.

  Option B: ClientMatch This is because option B shows how to use ClientMatch to optimize the wireless performance of Wi-Fi 6 clients on a UniFi network. ClientMatch is a feature that uses machine learning to analyze the traffic patterns of each client and assign them to the best available AP based on their location, device type, and network conditions2. Therefore, option B is the best technology to implement for your customer's issue.

  1: https://help.ui.com/hc/en-us/articles/221029967-UniFi-Network-Optimizing-Wireless- Connectivity 2: https://help.ui.com/hc/en-us/articles/360012947634-UniFi-Network- Optimizing-Wireless-Speeds

• Question 13:

  On AOS10 Gateways, which device persona is only available when configuring a Gateway- only group'?

  A. Edge

  B. Mobility

  C. Branch

  D. VPN Concentrator

  Correct Answer: B

  Explanation: AOS 10 Gateways can have the following personas: Mobility, Branch, and VPN Concentrator1 However, the Mobility persona is only available when configuring a Gateway-only group, which is a group that contains only one gateway device2 The Mobility persona provides Overlay WLAN and (or) wired LAN functionalities for campus networks1 The Branch persona provides the Aruba Instant OS and SD-Branch (LAN + WAN) functionality for branch and microbranch networks1 The VPN Concentrator persona provides VPN termination and routing functionality for remote access networks3 The Edge persona is not a valid option, as it is not a supported device persona for AOS 10 Gateways.

• Question 14:

  For the Aruba CX 6400 switch, what does virtual output queueing (VOQ) implement that is different from most typical campus switches?

  A. large ingress packet buffers

  B. large egress packet buffers

  C. per port ASICs

  D. VSX

  Correct Answer: A

  Explanation: The Aruba CX 6400 switch is a modular switch that supports high- performance and high-density Ethernet switching for campus and data center networks. One of the features that distinguishes the Aruba CX 6400 switch from most typical campus switches is virtual output queueing (VOQ). VOQ is a technique that implements large ingress packet buffers on each port to prevent head-of-line blocking and packet loss due to congestion2. VOQ allows each port to have multiple queues for different output ports and prioritize packets based on their destination and QoS class2. VOQ enables the Aruba CX 6400 switch to achieve high throughput and low latency for various traffic types and scenarios. References: 2 https://www.arubanetworks.com/assets/ds/DS_CX6400Series.pdf

• Question 15:

  A company recently deployed new Aruba Access Points at different branch offices Wireless 802.1X authentication will be against a RADIUS server in the cloud. The security team is concerned that the traffic between the AP and the RADIUS server will be exposed.

  What is the appropriate solution for this scenario?

  A. Enable EAP-TLS on all wireless devices

  B. Configure RadSec on the AP and Aruba Central.

  C. Enable EAP-TTLS on all wireless devices.

  D. Configure RadSec on the AP and the RADIUS server

  Correct Answer: D

  Explanation: This is the appropriate solution for this scenario where wireless 802.1X authentication will be against a RADIUS server in the cloud and the security team is concerned that the traffic between the AP and the RADIUS server will be exposed. RadSec, also known as RADIUS over TLS, is a protocol that provides encryption and authentication for RADIUS traffic over TCP and TLS. RadSec can be configured on both the AP and the RADIUS server to establish a secure tunnel for exchanging RADIUS packets. The other options are incorrect because they either do not provide encryption or authentication for RADIUS traffic or do not involve RadSec. References: https://www.securew2.com/blog/what-is-radsec/ https://www.cloudradius.com/radsec-vs- radius/

• Question 16:

  Which standard supported by some Aruba APs can enable a customer to accurately locate wireless client devices within a few meters?

  A. 802.11mc

  B. 802.11W

  C. 802.11k

  D. 802.11r

  Correct Answer: A

  The standard that is supported by some Aruba APs and can enable a customer to accurately locate wireless client devices within a few meters is A. 802.11mc. 802.11mc is an IEEE standard that enables computing devices to measure the distance to nearby Wi-Fi access points using a technique called Fine Timing Measurement (FTM). FTM uses precise timestamps to calculate the round-trip time of Wi-Fi frames between the device and the access point, and then converts it to a distance estimate. By using multiple access points and triangulation methods, the device can determine its location with high accuracy1. According to the Aruba document 802.11mc Support, this feature is supported on 500 Series, 510 Series, 530 Series, 550 Series, 560 Series and 570 Series access points. These APs act as FTM responders to time measurement queries sent from a client. To configure the AP to send FTM responses, you need to enable the ftm-responder-enable parameter in the WLAN SSID profile1.

• Question 17:

  A system engineer needs to preconfigure several Aruba CX 6300 switches that will be sent to a remote office An untrained local field technician will do the rollout of the switches and the mounting of several AP-515s and AP-575S. Cables running to theAPs are not labeled.

  The VLANs are already preconfigured to VLAN 100 (mgmt), VLAN 200 (clients), and VLAN 300 (guests)

  What is the correct configuration to ensure that APs will work properly?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: C

  Explanation: Option C is the correct configuration to ensure that APs will work properly. It uses the ap command to configure a port profile for APs with VLAN 100 as the native VLAN and VLAN 200 and 300 as tagged VLANs. It also enables

  LLDP on the ports to discover the APs and assign them to the port profile automatically. The other options are incorrect because they either do not use the ap command, do not enable LLDP, or do not configure the VLANs correctly.

  References:

  https://www.arubanetworks.com/techdocs/AOS-CX_10_08/UG/bk01-ch02.html https://www.arubanetworks.com/techdocs/AOS-CX_10_08/UG/bk01-ch03.html

• Question 18:

  A customer wants to provide wired security as close to the source as possible The wired security must meet the following requirements: -allow ping from the IT management VLAN to the user VLAN -deny ping sourcing from the user VLAN to the IT management VLAN The customer is using Aruba CX 6300s What is the correct way to implement these requirements?

  A. Apply an outbound ACL on the user VLAN allowing temp echo-reply traffic toward the IT management VLAN

  B. Apply an inbound ACL on the user VLAN allowing icmp echo-reply traffic toward the IT management VLAN

  C. Apply an inbound ACL on the user VLAN denying icmp echo traffic toward the IT management VLAN

  D. Apply an outbound ACL on the user VLAN denying icmp echo traffic toward the IT management VLAN

  Correct Answer: C

  Explanation: An inbound ACL is applied to traffic entering a port or VLAN. An outbound ACL is applied to traffic leaving a port or VLAN4. To deny ping sourcing from the user VLAN to the IT management VLAN, an inbound ACL on the user VLAN should be used to filter icmp echo traffic toward the IT management VLAN. Icmp echo-reply traffic is not needed to be allowed because it is already permitted by default5. References: 4 https://techhub.hpe.com/eginfolib/Aruba/OSCX_10.04/5200-6692/GUID-9B8F6E8F- 9C7A-4F0D-AE7B-9D8E6C5B6A7F.html 5 https://techhub.hpe.com/eginfolib/Aruba/OS- CX_10.04/5200-6692/GUID-0C3A9D0F-6E5B-4E1A-AF3C-8D8B2F9C1A7B.html

• Question 19:

  A customer is using Aruba Cloud Guest, but visitors keep complaining that the captive portal page keeps coming up after devices go to sleep. Which solution should be enabled to deal with this issue?

  A. MAC Caching under the splash page

  B. MAC Caching under the user-role

  C. Wireless Caching under the splash page

  D. MAC Caching under the WLAN

  Correct Answer: A

  Explanation: MAC Caching is a feature that allows a guest user to bypass the captive portal page after the first authentication based on their MAC address1 MAC Caching can be enabled under the splash page settings in Aruba Cloud Guest2 MAC Caching can improve the user experience and reduce the network overhead by eliminating the need for repeated authentication.

• Question 20:

  A company deployed Dynamic Segmentation with their CX switches and Gateways After performing a security audit on their network, they discovered that the tunnels built between the CX switch and the Aruba Gateway are not encrypted. The company is concerned that bad actors could try to insert spoofed messages on the Gateway to disrupt communications or obtain information about the network.

  Which action must the administrator perform to address this situation?

  A. Enable Secure Mode Enhanced

  B. Enable Enhanced security

  C. Enable Enhanced PAPI security D. Enable GRE security

  Correct Answer: C

  Explanation: PAPI is the protocol that is used to establish tunnels between the CX switch and the Aruba Gateway for Dynamic Segmentation1. By default, PAPI uses a simple checksum to verify the integrity of the messages, but it does not encrypt the payload2. This could expose the network to spoofing or replay attacks by malicious actors. To address this situation, the administrator must enable Enhanced PAPI security, which uses AES-256 encryption and HMAC-SHA1 authentication to protect the tunnel traffic2. Enhanced PAPI security can be enabled on the CX switch by using the command system papi enhanced- security enable3. This will ensure that the tunnels built between the CX switch and the Aruba Gateway are encrypted and authenticated.