HP HP Certifications HPE7-A01 Questions & Answers

• Question 51:

  What is a primary benefit of BSS coloring?

  A. BSS color tags improve performance by allowing APS on the same channel to be farther apart

  B. BSS color tags improve security by identifying rogue APS and tagging them as threats.

  C. BSS color tags are applied on the wireless controllers and can reduce the threshold for interference_

  D. BSS color tags are applied to WI-Fi channels and can reduce the threshold tor interference

  Correct Answer: D

  Explanation: The primary benefit of BSS coloring is D. BSS color tags are applied to Wi-Fi channels and can reduce the threshold for interference. BSS coloring is a mechanism that allows Wi-Fi 6 devices to mark each frame with a color code that identifies the BSS (Basic Service Set) it belongs to. This helps differentiate between frames from different BSSs that share the same channel and avoid unnecessary collisions and backoffs. BSS coloring also introduces an adaptive threshold for interference, which means that Wi-Fi 6 devices can adjust the signal strength value that determines whether a channel is busy or not based on the current network environment. This allows for more efficient use of spectrum and higher throughput in dense scenarios12.

• Question 52:

  you need to have different routing-table requirements With Aruba CX 6300 VSF configuration.

  Assuming the correct layer-2 VLAN already exists, how would you create a new SVI for a separate routing table?

  A. create a new VLAN, and attach the VRF to it.

  B. Create a new routing table, and attach VLANS to it

  C. Create a new SVI and use attach command.

  D. Create a new VLAN. and attach the routing table to it

  Correct Answer: C

  The correct answer is C. Create a new SVI and use attach command. To create a new SVI for a separate routing table, you need to use the attach command to associate the SVI with a VRF (Virtual Routing and Forwarding) instance. A VRF is a logical entity that allows multiple routing tables to coexist on the same switch. Each VRF has its own set of interfaces, routing protocols, and routes that are isolated from other VRFs. According to the AOS-CX Virtual Switching Framework (VSF) Guide1, one of the steps to configure VRF-aware VSF is: Configure the VRFs on each member switch and assign the SVIs to the respective VRFs using the attach command. For example: switch(config)# vrf red switch(config-vrf)# exit switch(config)# interface vlan 10 switch(config-if-vlan)# ip address 10.1.1.1/24 switch(config-if-vlan)# attach vrf red The above commands create a VRF named red and assign VLAN 10 SVI to it. The SVI has an IP address of 10.1.1.1/24. The other options are incorrect because:

  A. You cannot attach a VRF to a VLAN directly. You need to create an SVI for the VLAN and then attach the VRF to the SVI.

  B. You cannot create a new routing table manually. You need to create a VRF and then use routing protocols or static routes to populate the routing table for the VRF.

  D. You cannot attach a routing table to a VLAN directly. You need to create an SVI for the VLAN and then attach a VRF that has a routing table associated with it.

• Question 53:

  A new network design is being considered to minimize client latency in a high-density environment. The design needs to do this by eliminating contention overhead by dedicating subcarriers to clients.

  Which technology is the best match for this use case?

  A. OFDMA

  B. MU-MIMO

  C. QWMM

  D. Channel Bonding

  Correct Answer: A

  Explanation: OFDMA (Orthogonal Frequency Division Multiple Access) is a technology that can minimize client latency in a high-density environment by eliminating contention overhead by dedicating subcarriers to clients. OFDMA allows multiple clients to transmit simultaneously on different subcarriers within the same channel, reducing contention and increasing efficiency. MU-MIMO (Multi-User Multiple Input Multiple Output) is a technology that allows multiple clients to transmit simultaneously on different spatial streams within the same channel, but it does not eliminate contention overhead. QWMM (Quality of Service Wireless Multimedia) is a technology that prioritizes traffic based on four access categories, but it does not eliminate contention overhead. Channel Bonding is a technology that combines two adjacent channels into one wider channel, increasing bandwidth but not eliminating contention overhead. References: https://www.arubanetworks.com/assets/ds/DS_AP510Series.pdf https://www.arubanetworks.com/assets/wp/WP_WiFi6.pdf

• Question 54:

  Refer to the exhibit.

  

  A company has deployed 200 AP-635 access points. To but is not working as expected

  What would be the correct action to fix the issue?

  A. Change the SSID to WPA3-Enhanced Open

  B. Change the SSID to WPA3-Enterprise (CCM).

  C. Change the SSID to WPA3-Personal

  D. Change the SSID to WPA3-Enterpnse (CNSA).

  Correct Answer: D

  Explanation: According to the Aruba Campus Access Professional documents1, WPA3- Enterprise is a security mode that supports 802.1X authentication and encryption with either AES-CCM or AES-GCMP. WPA3-Enterprise also optionally adds usage of Suite-B 192-bit minimum-level security suite that is aligned with Commercial National Security Algorithm (CNSA) for enterprise networks2. This mode provides the highest level of security and is suitable for government and financial institutions. The exhibit shows that the SSID is configured with WPA3-Enterprise (CCM), which uses AES-CCM as the encryption protocol. However, this mode is not compatible with some devices that require CNSA compliance. Therefore, changing the SSID to WPA3-Enterprise (CNSA) would fix the issue and allow all devices to connect to the network.

• Question 55:

  For an Aruba AOS10 AP in mixed mode, which factors can be used to determine the forwarding role assigned to a client? (Select two.)

  A. Client IP address

  B. 802.1X authentication result

  C. Client MAC address

  D. Client SSID

  E. Client VLAN

  Correct Answer: AD

  Client IP address: This factor can be used to determine if the client is on the same VLAN as the AP or not. If the client IP address is on the same VLAN as the AP, then the client traffic is bridged locally. If the client IP address is on a different

  VLAN than the AP, then the client traffic is forwarded to the gateway cluster through a secure tunnel 12.

  Client VLAN: This factor can be used to determine if the client belongs to a specific VLAN or not. If the client belongs to a specific VLAN, then the client traffic is forwarded to that VLAN based on its IP address and security profile 12.

• Question 56:

  Refer to Exhibit:

  

  With Access-1, What needs to be identically configured With MSTP to load-balance VLANS?

  A. Spanning-tree bpdu-guard setting

  B. Spanning-tree instance vlan mapppjng

  C. spanning-tree Cist mapping

  D. Spanning-tree root-guard setting

  Correct Answer: B

  Explanation: The correct answer is B. Spanning-tree instance VLAN mapping. To load-balance VLANs with MSTP, you need to configure the same VLAN-to-instance mapping on all switches in the same MST region. This means that you need to assign different VLANs to different MST instances, and then adjust the spanning tree parameters (such as priority, cost, or port role) for each instance to achieve the desired load balancing. For example, you can make one switch the root for instance 1 and another switch the root for instance 2, and then map half of the VLANs to instance 1 and the other half to instance 2. According to the Cisco document Understand the Multiple Spanning Tree Protocol (802.1s), one of the steps to configure MST is: Split your set of VLANs into more instances and configure different MST settings for each of these instances. In order to easily achieve this, elect Bridge D1 to be the root for VLANs 501 through 1000, and Bridge D2 to be the root for VLANs 1 through 500. These statements are true for this configuration: Switch D1(config)#spanning-tree mst configuration Switch D1(config-mst)#instance 1 vlan 501-1000 Switch D1(config-mst)#exit Switch D1(config)#spanning-tree mst 1 priority 0

  Switch D2(config)#spanning-tree mst configuration Switch D2(config-mst)#instance 2 vlan 1-500 Switch D2(config-mst)#exit Switch D2(config)#spanning-tree mst 2 priority 0 The above commands create two MST instances, 1 and 2, and map VLANs 501-1000 to instance 1 and VLANs 1-500 to instance 2. Then, they make switch D1 the root for instance 1 and switch D2 the root for instance 2. The other options are incorrect because:

  A. Spanning-tree bpdu-guard setting is a security feature that disables a port if it receives a BPDU from an unauthorized device. It does not affect load balancing with MSTP.

  C. Spanning-tree CIST mapping is not a valid command. CIST stands for Common and Internal Spanning Tree, which is the spanning tree instance that runs within an MST region and interacts with other regions or non-MST switches. D. Spanning-tree root-guard setting is another security feature that prevents a port from becoming a root port if it receives superior BPDUs from another switch. It does not affect load balancing with MSTP.

• Question 57:

  What are the requirements to ensure that WMM is working effectively'? (Select two)

  A. The APs and the controller are Wi-Fi CERTIFIED for WMM which is enabled

  B. All APs need to be from the AP-5xx series and AP-6xx series which are Wi-Fi CERTIFIED 6.

  C. The Client must be Wi-Fi CERTIFIED for WMM and configured for WMM marking.

  D. The Aruba AOS10 APs installed have to be converted to controlled mode

  E. The AP needs to be connected via a tagged VLAN to the wired port

  Correct Answer: AC

  Explanation: These are the correct requirements to ensure that WMM (Wi-Fi Multimedia) is working effectively. WMM is a standard that provides quality of service (QoS) for wireless networks by prioritizing traffic into four categories: voice, video, best effort, and background. To use WMM, both the APs and the controller must be Wi-Fi CERTIFIED for WMM, which means they have passed interoperability tests and comply with the standard. WMM must also be enabled on the APs and the controller, which is usually the default setting. The client device must also be Wi-Fi CERTIFIED for WMM and configured for WMM marking, which means it can tag its traffic with the appropriate priority level based on the application type. The other options are incorrect because they are either not related to WMM or not required for WMM to work. References: https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos- solutions/wlan-qos/wmm.htm https://www.wi-fi.org/discover-wi-fi/wi-fi-certified-wmm

• Question 58:

  Review the exhibit.

  

  You are troubleshooting an issue with a 10 102.39 0/24 subnet which is also VLAN 1000 used Tor wireless clients on a pair of Aruba CX 8360 switches The subnet SVI is configured on the 8360 pair, and the DHCP server is a Microsoft

  Windows Server 2022 Standard with an IP address of 10 200 1.100. The 10.102.250.0/24 subnet is used for switch management.

  A large number of DHCP requests are failing You are observing sporadic DHCP behavior across clients attached to the CX 6100 switch.

  Which action may help fix the issue?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: C

  Explanation: Option C is the only action that configures the DHCP relay on the SVI of VLAN 1000 on the CX 8360 switches. DHCP relay is a feature that allows a switch to forward DHCP requests from clients in one subnet to a DHCP server

  in another subnet. DHCP relay is required when the DHCP server and the clients are not in the same broadcast domain1.

  Option C uses the following commands:

  interface vlan 1000: This command enters the interface configuration mode for the SVI of VLAN 1000, which has an IP address of 10.102.39.1/24 and is used for wireless clients.

  ip helper-address vrf default 10.200.1.100: This command configures the IP address of the DHCP server as a helper address for the SVI, which means that the switch will forward DHCP requests from clients on VLAN 1000 to this address.

  The vrf default parameter indicates that the SVI and the DHCP server are in the same VRF.

• Question 59:

  A customer is concerned about me unprotected traffic between an AOS-CX switch and a gateway, running on AOStO. What is a feasible option to protect this traffic?

  A. Implement an IPSec tunnel to protect PAPI between the AOS-CX switches and the gateway

  B. Implement an MD5 HMAC function lo protect PAPI between the AOS-CX switches and the gateway

  C. Implement a GRE tunnel to protect PAPI between the AOS-CX switches and the gateway

  D. no action is needed, an RSA certificate already encrypts the traffic

  Correct Answer: A

  Explanation: According to the Aruba Documentation Portal1, PAPI (Port Aggregation Protocol) is a protocol that allows multiple physical ports to be aggregated into a single logical port for increased bandwidth and performance. PAPI can be

  used between AOS-CX switches and gateways, or between AOS-CX switches and other devices.

  Option A: Implement an IPSec tunnel to protect PAPI between the AOS-CX switches and the gateway

  This is because option A shows how to implement an IPSec tunnel between two devices using the interface command and the ipsec command. An IPSec tunnel can provide encryption and authentication for PAPI traffic between two devices,

  such as an AOS-CX switch and a gateway2.

  Therefore, option A is a feasible option to protect this traffic. I hope this helps you. If you need more information, please let me know.

  1: https://www.arubanetworks.com/techdocs/AOS-CX/10.06/HTML/5200- 7727/Content/Chp_prev_traf_loss/Act_gtw_act_fwd/act-gat-ove-vsx-10.htm 2: https://community.arubanetworks.com/blogviewer?blogkey=989fc43a-e0df-42db-9c0b- f96d6565a1fa

• Question 60:

  You are working on a network where the customer has a dedicated router with redundant Internet connections Tor outbound high-importance real-time audio streams from their datacenter All of this traffic.

  originates from a single subnet uses a unique range of UDP ports is required to be routed to the dedicated router

  All other traffic should route normally The SVI for the subnet containing the servers originating the traffic is located on the core routing switch in the datacenter.

  What should be configured?

  A. Configure a new OSPF area including both the core routing switch and the dedicated router

  B. Configure a BGP link between the core routing switch and the dedicated router and route filtering.

  C. Configure Policy Based Routing (PBR) on the core routing switch for the VRF with the servers' SVI

  D. Configure a dedicated VRF on the core routing switch and make the dedicated router the default route.

  Correct Answer: C

  Explanation: The reason is that PBR allows you to route packets based on policies that match certain criteria, such as source or destination IP addresses, ports, protocols, etc. PBR can also be used to set metrics, next-hop addresses, or tag traffic for different routes.