HP HP Certifications HPE7-A01 Questions & Answers

• Question 41:

  You are doing tests in your lab and with the following equipment specifications

  AP1 has a radio that generates a 10 dBm signal AP2 has a radio that generates a 11 dBm signal AP1 has an antenna with a gain of 9 dBi AP2 has an antenna with a gain of 12 dBi. The antenna cable for AP1 has a 2 dB loss The antenna cable for AP2 has a 3 dB loss

  What would be the calculated Equivalent Isotropic Radiated Power (EIRP) for APT?

  A. 26 dBm

  B. 30 dBm

  C. 17 dBm

  D. -12 dBm

  Correct Answer: C

  Explanation: The calculated Equivalent Isotropic Radiated Power (EIRP) for AP1 is 17 dBm.

  EIRP is the measured radiated power of an antenna in a specific direction. It is equal to the input power to the antenna multiplied by the gain of the antenna. It can also take into account the losses in transmission line, connectors, and other

  components. The formula for EIRP is:

  EIRP = P + G - L

  where P is the output power of the radio, G is the gain of the antenna, and L is the loss of the cable and connectors.

  For AP1, we have:

  P = 10 dBm G = 9 dBi L = 2 dB

  Therefore,

  EIRP = 10 + 9 - 2 EIRP = 17 dBm

• Question 42:

  Describe the difference between Class of Service (CoS) and Differentiated Services Code Point (DSCP).

  A. CoS has much finer granularity than DSCP

  B. CoS is only contained in VLAN Tag fields DSCP is in the IP Header and preserved throughout the IP packet flow

  C. They are similar and can be used interchangeably.

  D. CoS is only used to determine CLASS of traffic DSCP is only used to differentiate between different Classes.

  Correct Answer: B

  Explanation: CoS and DSCP are both methods of marking packets for quality of service (QoS) purposes. QoS is a mechanism that allows network devices to prioritize and differentiate traffic based on certain criteria, such as application type,

  source, destination, etc. CoS stands for Class of Service and is a 3-bit field in the 802.1Q VLAN tag header. CoS can only be used on Ethernet frames that have a VLAN tag, and it can only be preserved within a single VLAN domain. DSCP

  stands for Differentiated Services Code Point and is a 6-bit field in the IP header. DSCP can be used on any IP packet, regardless of the underlying layer 2 technology, and it can be preserved throughout the IP packet flow, unless it is

  modified by intermediate devices. References:

  https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/qos/configuration/15-mt/qos-15-mt- book/qos-overview.html https://www.cisco.com/c/en/us/support/docs/lan- switching/8021q/17056-741-4.html https://www.cisco.com/c/en/us/support/docs/

  quality-of- service-qos/qos-packet-marking/10103-dscpvalues.html

• Question 43:

  Refer to the exhibit.

  

  With Core-1. what is the default value for config-revision?

  A. 0

  B. 1

  C. 1-0

  D. 0. 0

  Correct Answer: A

  Explanation: The default value for config-revision on Core-1 is 0. Config-revision is a parameter that indicates the configuration version of a VSX pair. It is used to synchronize the configuration between the VSX peers and to detect any configuration mismatch. The config-revision value is set to 0 by default on both VSX peers and is incremented by 1 every time a configuration change is made on either peer. The other options are incorrect because they do not reflect the default value of config-revision. References: https://www.arubanetworks.com/techdocs/AOS-CX/10.04/HTML/5200-6728/bk01- ch07.html https://www.arubanetworks.com/techdocs/AOS-CX/10.04/HTML/5200- 6728/bk01-ch02.html

• Question 44:

  Using Aruba best practices what should be enabled for visitor networks where encryption is needed but authentication is not required?

  A. Wi-Fi Protected Access 3 Enterprise

  B. Opportunistic Wireless Encryption

  C. Wired Equivalent Privacy

  D. Open Network Access

  Correct Answer: B

  Explanation: Opportunistic Wireless Encryption (OWE) is a feature that provides encryption for open wireless networks without requiring authentication. OWE uses an enhanced version of the 4-way handshake to establish a pairwise key between the client and the AP, which is then used to encrypt the wireless traffic using WPA2 or WPA3 protocols. OWE can be used for visitor networks where encryption is needed but authentication is not required. References: https://www.arubanetworks.com/assets/tg/TG_OWE.pdf

• Question 45:

  What is an Aruba-recommended best practice for hardening that only applies to Aruba CX 6300 series switches with dedicated management ports?

  A. Implement a control plane ACL to limit access to approved IPs and/or subnets

  B. Manually enable Enhanced Security Mode from a console session.

  C. Disable all management services on the default VRF.

  D. Create a dedicated management VRF, and assign the management port to it.

  Correct Answer: D

  Explanation: This is an Aruba-recommended best practice for hardening that only applies to Aruba CX 6300 series switches with dedicated management ports. A dedicated management port is a physical port that is used exclusively for outof-band management access to the switch. A dedicated management VRF is a virtual routing and forwarding instance that isolates the management traffic from other traffic on the switch. By creating a dedicated management VRF and assigning the management port to it, the administrator can enhance the security and performance of the management access to the switch. The other options are incorrect because they either do not apply to switches with dedicated management ports or do not follow Aruba-recommended best practices. References: https://www.arubanetworks.com/assets/ds/DS_AOS-CX.pdf https://www.arubanetworks.com/assets/tg/TB_ArubaCX_Switching.pdf

• Question 46:

  A customer is using a legacy application that communicates at layer-2. The customer would like to keep this application working to a remote site connected via layer-3 All legacy devices are connected to a dedicated Aruba CX 6200 switch at each site.

  What technology on the Aruba CX 6200 could be used to meet this requirement?

  A. Inclusive Multicast Ethernet Tag (IMET)

  B. Ethernet over IP (EolP)

  C. Generic Routing Encapsulation (GRE)

  D. Static VXLAN

  Correct Answer: A

  Explanation: VXLAN is a technology that can be used to meet the requirement of using a legacy application that communicates at layer-2 across a layer-3 network. Static VXLAN is a feature that allows the creation of layer-2 overlay networks over a layer-3 underlay network using VXLAN tunnels. Static VXLAN does not require any control plane protocol or VTEP discovery mechanism, and can be configured manually on the Aruba CX 6200 switches. The other options are incorrect because they either do not support layer-2 communication over layer-3 network or are not supported by Aruba CX 6200 switches. References: https://www.arubanetworks.com/techdocs/AOS-CX/10.04/HTML/5200- 6728/bk01ch03.html https://www.arubanetworks.com/techdocs/AOS- CX/10.04/HTML/5200-6728/bk01-ch05.html

• Question 47:

  When configuring UBT on a switch what will happen when a gateway role is not specified?

  A. The switch will put the client on the access VLAN

  B. The gateway will assign a default role to the client

  C. The switch will assign the default deny role to the client.

  D. The gateway will send back the deny role to the client.

  Correct Answer: A

  Explanation: According to the Aruba Documentation Portal1, user-based tunneling (UBT) is a feature that uses GRE to tunnel ingress traffic on a switch interface to a gateway for further processing. UBT enables a switch to provide a

  centralized security policy, using per- user authentication and access control to ensure consistent access and permissions.

  Option A: The switch will put the client on the access VLAN This is because option A shows how UBT works on an Aruba switch. When a device connects to the network, it is authenticated using either MAC Authentication or 802.1X and

  triggers an enforcement policy from ClearPass, which contains an enforcement profile with a user role configuration. The user role can be assigned locally on the switch or on ClearPass as part of an enforcement profile. The user role

  determines the VLAN that the device belongs to and the access policies that apply to it23.

  Therefore, option A is correct.

  1: https://www.arubanetworks.com/techdocs/central/latest/content/nms/aos-cx/cfg/conf-cx- ubt.htm 2: https://www.arubanetworks.com/techdocs/AOS-CX/10.06/HTML/5200- 7696/GUID-581D2976-694B-46C7-8497-F6B788AA05B2.html 3: https://community.arubanetworks.com/viewdocument/?DocumentKey=c740df4e-3e26- 4cc5-9126-355a18709c44andCommunityKey=2fd943a6-8898-4dbe-915f- 4f09e4d3c317andtab=librarydocuments

• Question 48:

  A network engineer recently identified that a wired device connected to a CX Switch is misbehaving on the network To address this issue, a new ClearPass policy has been put in place to prevent this device from connecting to the network again.

  Which steps need to be implemented to allow ClearPass to perform a CoA and change the access for this wired device? (Select two.)

  A. Confirm that NTP is configured on the switch and ClearPass

  B. Configure dynamic authorization on the switch.

  C. Bounce the switchport

  D. Use Dynamic Segmentation.

  E. Configure dynamic authorization on the switchport

  Correct Answer: BC

  Explanation: CoA (Change of Authorization) is a feature that allows ClearPass to dynamically change the authorization and access privileges of a device after it has been authenticated1. CoA uses RADIUS messages to communicate with the network device and instruct it to perform an action, such as reauthenticating the device, applying a new VLAN or user role, or disconnecting the device2. To enable CoA on a CX switch, the network engineer needs to configure dynamic authorization on the switch, which is a global command that allows the switch to accept RADIUS messages from ClearPass and execute the requested actions3. The network engineer also needs to specify the IP address and shared secret of ClearPass as a dynamic authorization client on the switch3. To trigger CoA for a specific wired device, the network engineer needs to bounce the switchport, which is an action that temporarily disables and re-enables the port where the device is connected. This forces the device to reauthenticate and receive the new policy from ClearPass. Bouncing the switchport can be done manually by using the interface shutdown and no shutdown commands, or automatically by using ClearPass as a CoA server and sending a RADIUS message with the Port-Bounce-Host AVP (Attribute-Value Pair).

• Question 49:

  A large retail client is looking to generate a rich set of contextual data based on the location information of wireless clients in their stores.

  Which standard uses Round Trip Time (RTT) and Fine Time Measurements (FTM) to calculate the distance a client is from an AP?

  A. 802.11ah

  B. 802.11mc

  C. 802.11be

  D. 802.11V

  Correct Answer: B

  Explanation: 802.11mc is a standard that uses Round Trip Time (RTT) and Fine Time Measurements (FTM) to calculate the distance a client is from an AP. 802.11mc defines a protocol for exchanging FTM frames between an AP and a client, which contain timestamps that indicate when the frames were transmitted and received. By measuring the RTT of these frames, the AP or the client can estimate their distance based on the speed of light. The other options are incorrect because they either do not use RTT or FTM or do not exist as standards. References: https://www.arubanetworks.com/assets/wp/WP_WiFi6.pdf https://www.arubanetworks.com/assets/ds/DS_AP510Series.pdf

• Question 50:

  Your manufacturing client is deploying two hundred wireless IP cameras and fifty headless scanners in their warehouse. These new devices do not support 802.1X authentication.

  How can HPE Aruba enhance security for these new IP cameras in this environment?

  A. Use MPSK Local to automatically provide unique pre-shared Keys for devices.

  B. Aruba ClearPass performs the 802.1X authentication and installs a certificate.

  C. MPSK provides for each device in the WLAN to have its own unique pre-shared Key.

  D. MPSK Local will allow the cameras to share a rey and the scanners to share a different

  Correct Answer: C

  The best option to enhance security for the new IP cameras and scanners in this environment is C. MPSK provides for each device in the WLAN to have its own unique pre- shared key.

  MPSK stands for Multi Pre-Shared Key, and it is a feature that allows different devices to connect to the same SSID with different pre-shared keys. This improves the security and scalability of the network, as each device can have its own key

  and role without requiring 802.1X authentication or an external policy engine. MPSK can be configured either locally on the AP or centrally on Aruba Central12.

  The other options are incorrect because:

  A. MPSK Local is a feature that allows the user to configure 24 PSKs per SSID locally on the device. These local PSKs would serve as an extension of the base MPSK functionality. However, MPSK Local is not suitable for this scenario, as it can only support up to 24 devices per SSID, while the client has 250 devices1. B. Aruba ClearPass is a network access control solution that can perform 802.1X authentication and install certificates for devices. However, this option is not feasible for this scenario, as the new IP cameras and scanners do not support 802.1X authentication3.

  D. MPSK Local will not allow the cameras to share a key and the scanners to share a different key. MPSK Local will assign a different key to each device, regardless of their type. Moreover, MPSK Local can only support up to 24 devices per SSID, while the client has 250 devices1.