HPE7-A01 시험 - HP실제시험문제와 답 - 77문항

Question No : 1

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 subcamers to clients.
Which technology is the best match for this use case?

A.OFDMA
B.MU-MIMO
C.QWMM
D.Channel Bonding

정답:
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 No : 2

In AOS 10. which session-based ACL below will only allow ping from any wired station to wireless clients but will not allow ping from wireless clients to wired stations"? The wired host ingress traffic arrives on a trusted port.

A.ip access-list session pingFromWired any user any permit
B.ip access-list session pingFromWired user any svc-icmp deny any any svc-icmp permit
C.ip access-list session pingFromWired any any svc-icmp permit user any svc-icmp deny
D.ip access-list session pingFromWired any any svc-icmp deny any user svc-icmp permit

정답:
Explanation:
A session-based ACL is applied to traffic entering or leaving a port or VLAN based on the direction of the session initiation. To allow ping from any wired station to wireless clients but not vice versa, a session-based ACL should be used to deny icmp echo traffic from any source to any destination, and then permit icmp echo-reply traffic from any source to user destination. The user role represents wireless clients in AOS 10.
References:
https://techhub.hpe.com/eginfolib/Aruba/OS-CX_10.04/5200-6692/GUID-BD3E0A5F-FE4C-4B9B-BE1D-FE7D
https://techhub.hpe.com/eginfolib/networking/docs/arubaos-switch/security/GUID-EA0A5B3C-FE4C-4B9B-BE

Question No : 3

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)

B)

C)

A.Option A
B.Option B
C.Option C

정답:
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 No : 4

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

정답:
Explanation:
The calculated Equivalent Isotropic Radiated Power (EIRP) for AP1 is 30 dBm. EIRP is the product of the transmitter power (in dBm) and the antenna gain (in dBi) minus the cable loss (in dB). For AP1, EIRP = 10 dBm + 9 dBi - 2 dB = 17 dBm. For AP2, EIRP = 11 dBm + 12 dBi - 3 dB = 20 dBm.
References:
https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/wlan-rf/rf-fundam
https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/wlan-rf/eirp.htm

Question No : 5

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

정답:
Explanation:
To allow ClearPass to perform a CoA and change the access for a wired device, the following steps need to be implemented:
* Confirm that NTP is configured on the switch and ClearPass. NTP is required to synchronize the time between the switch and ClearPass, which is essential for CoA messages to be processed correctly1.
* Configure dynamic authorization on the switch. Dynamic authorization is a feature that enables the switch to accept CoA messages from a RADIUS server and apply them to existing sessions2. Dynamic authorization can be enabled globally or per port on the switch2.
* Optionally, configure dynamic authorization on the switchport. This step is not required, but it can provide more granular control over which ports can accept CoA messages from a RADIUS server2. Bouncing the switchport or using Dynamic Segmentation are not necessary steps for allowing ClearPass to perform a CoA and change the access for a wired device.
References:
1 https://www.arubanetworks.com/techdocs/ClearPass/6.7/Aruba_DeployGd_HTML/Content/Aruba%20Controlle
2 https://www.arubanetworks.com/techdocs/AOS-CX/10.04/HTML/5200-6692/GUID-BD3E0A5F-FE4C-4B9B-B

Question No : 6

A customer is using a legacy application that communicates at layer-2. The customer would like to keep this application working across the campus which is connected via layer-3. The legacy devices are connected to Aruba CX 6300 switches throughout the campus.
Which technology minimizes flooding so the legacy application can work efficiently?

A.Generic Routing Encapsulation (GRE)
B.EVPN-VXLAN
C.Ethernet over IP (EolP)
D.Static VXLAN

정답:
Explanation:
EVPN-VXLAN is a technology that allows layer-2 communication across layer-3 networks by using Ethernet VPN (EVPN) as a control plane and Virtual Extensible LAN (VXLAN) as a data plane3. EVPN-VXLAN can be used to support legacy applications that communicate at layer-2 across different campuses or data centers that are connected via layer-3. EVPN-VXLAN minimizes flooding by using BGP to distribute MAC addresses and IP addresses of hosts across different VXLAN segments3. EVPN-VXLAN also provides benefits such as loop prevention, load balancing, mobility, and scalability3.
References: https://www.arubanetworks.com/assets/tg/TG_EVPN_VXLAN.pdf

Question No : 7

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

A.CoS is only used to determine CLASS of traffic DSCP is only used to differentiate between different Classes.
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 has much finer granularity than DSCP

정답:
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 No : 8

In an ArubaOS 10 architecture using an AP and a gateway, what happens when a client attempts to join the network and the WLAN is configured with OWE?

A.Authentication information is not exchanged
B.The Gateway will not respond.
C.No encryption is applied.
D.RADIUS protocol is utilized.

정답:
Explanation:
This is the correct statement about what happens when a client attempts to join the network and the WLAN is configured with OWE (Opportunistic Wireless Encryption). OWE is a standard that provides encryption for open networks without requiring any authentication or credentials from the client or the network. OWE uses a Diffie-Hellman key exchange mechanism to establish a secure session between the client and the AP without exchanging any authentication information. The other options are incorrect because they either describe scenarios that require authentication or encryption methods that are not used by OWE.
References:
https://www.arubanetworks.com/assets/wp/WP_WiFi6.pdf
https://www.arubanetworks.com/assets/ds/DS_AP510Series.pdf

Question No : 9

A customer has a large number of food-producing machines
* All machines are connected via Aruba CX6200 switches in VLANs 100.110. and 120
* Several external technicians are maintaining this special equipment
What are the correct commands to ensure that no rogue DHCP server will impact the network?
A)

B)

C)

D)

A.Option A
B.Option B
C.Option C
D.Option D

정답:
Explanation:
Option A shows the correct commands to ensure that no rogue DHCP server will impact the network.
The commands include the following steps:
* Enable DHCP snooping on the switch. DHCP snooping is a feature that prevents rogue DHCP servers from offering IP addresses to clients by filtering DHCP messages based on trusted and untrusted ports1.
* Configure VLANs 100, 110, and 120 as DHCP snooping VLANs. This means that DHCP snooping will be applied to these VLANs and any untrusted DHCP messages received on these VLANs will be dropped1.
* Configure LAG 1 as a trusted port for DHCP snooping. This means that any DHCP messages received on LAG 1 will be allowed and not filtered by DHCP snooping. LAG 1 is assumed to be connected to a legitimate DHCP server or a router that relays DHCP requests to a legitimate DHCP server1.
Option B is incorrect because it does not enable DHCP snooping on the switch or configure VLANs 100, 110, and 120 as DHCP snooping VLANs. Option C is incorrect because it does not configure LAG 1 as a trusted port for DHCP snooping. Option D is incorrect because it does not enable DHCP snooping on the switch or configure LAG 1 as a trusted port for DHCP snooping.
References: 1 https://techhub.hpe.com/eginfolib/Aruba/OS-CX_10.04/5200-6692/GUID-BD3E0A5F-FE4C-4B9B-BE1D-FE7

Question No : 10

You need lo 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 OSPF configuration for a separate routing table?

A.Create a new OSPF area, and attach VRF name.
B.Create a new OSPF process ID with vrf name.
C.Attach a new OSFP process ID with a custom routing table
D.Attach OSPF process ID in the VRF configuration.

정답:
Explanation:
To create a new OSPF configuration for a separate routing table, you need to create a new OSPF process ID with vrf name. This will create a new OSPF instance that is associated with the specified VRF and its routing table. The other options are incorrect because they either do not create a new OSPF instance or do not associate it with a VRF.
References:
https://www.arubanetworks.com/techdocs/AOS-CX/10.04/HTML/5200-6728/bk01-ch02.html
https://www.arubanetworks.com/techdocs/AOS-CX/10.04/HTML/5200-6728/bk01-ch03.html

Question No : 11

How is Multicast Transmission Optimization implemented in an HPE Aruba wireless network?

A."The optimal rate for sending multicast frames is based on the highest broadcast rate across all associated clients
B.When this option is enabled the minimum default rate for multicast traffic is set to 12 Mbps for 5 GHz
C.The optimal rate for sending multicast frames is based on the lowest broadcast rate across all associated clients.
D.The optimal rate for sending multicast frames is based on the lowest unicast rate across all associated clients.

정답:
Explanation:
This is the correct definition of Multicast Transmission Optimization in an HPE Aruba wireless network.
Multicast Transmission Optimization is a feature that improves the performance and reliability of multicast traffic by dynamically adjusting the transmission rate based on the highest broadcast rate across all associated clients. This ensures that multicast frames are sent at the optimal rate for each client and reduces retransmissions and packet loss. The other options are incorrect because they either describe different features or use incorrect terms.
References:
https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/multicast/multica
https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/multicast/multica

Question No : 12

Which method is used to onboard a new UXI in an existing environment with 802 1X authentication? (The sensor has no cellular connection)

A.Use the UXI app on your smartphone and connect the UXI via Bluetooth
B.Use the Aruba installer app on your smartphone to scan the barcode
C.Connect the new UXI from an already installed one and adjust the initial configuration.
D.Use the CLI via the serial cable and adjust the initial configuration.

정답:
Explanation:
To onboard a new UXI in an existing environment with 802.1X authentication, you need to use the UXI app on your smartphone and connect the UXI via Bluetooth. The UXI app allows you to scan the QR code on the UXI sensor and configure its network settings, such as SSID, password, IP address, etc.
The Bluetooth connection allows you to communicate with the UXI sensor without requiring any network access or cellular connection. The other options are incorrect because they either do not use the UXI app or do not use Bluetooth.
References:
https://www.arubanetworks.com/products/network-management-operations/analytics-monitoring/user-experienc
https://help.centralon-prem.arubanetworks.com/2.5.4/documentation/online_help/content/nms-on-prem/aos-cx/g

Question No : 13

You need to create a keepalive network between two Aruba CX 8325 switches for VSX configuration How should you establish the keepalive connection?

A.SVI, VLAN trunk allowed all on ISL in default VRF
B.routed port in custom VRF
C.loopback 0 and OSPF area 0 in default VRF
D.SVI, VLAN trunk allowed all on ISL in custom VRF

정답:
Explanation:
To establish a keepalive connection between two Aruba CX 8325 switches for VSX configuration, you need to use a routed port in custom VRF. A routed port is a physical port that acts as a layer 3 interface and does not belong to any VLAN. A custom VRF is a virtual routing and forwarding instance that provides logical separation of routing tables. By using a routed port in custom VRF, you can isolate the keepalive traffic from other traffic and prevent routing loops or conflicts. The other options are incorrect because they either do not use a routed port or do not use a custom VRF.
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 No : 14

Which Aruba AP mode is sending captured RF data to Aruba Central for waterfall plot?

A.Hybrid Mode
B.Air Monitor
C.Spectrum Monitor
D.Dual Mode

정답:
Explanation:
Spectrum Monitor is an Aruba AP mode that is sending captured RF data to Aruba Central for waterfall plot.
Spectrum Monitor is a mode that allows an AP to scan all channels in both 2.4 GHz and 5 GHz bands and collect information about the RF environment, such as interference sources, noise floor, channel utilization, etc. The AP then sends this data to Aruba Central, which is a cloud-based network management platform that can display the data in various formats, including waterfall plot. Waterfall plot is a graphical representation of the RF spectrum over time, showing the frequency, amplitude, and duration of RF signals. The other options are incorrect because they are either not AP modes or not sending RF data to Aruba Central.
References:
https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/1-overview/spect
https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/1-overview/water
https://www.arubanetworks.com/products/network-management-operations/aruba-central/

Question No : 15

What is an OSPF transit network?

A.a network that uses tunnels to connect two areas
B.a special network that connects two different areas
C.a network on which a router discovers at least one neighbor
D.a network that connects to a different routing protocol

정답:
Explanation:
OSPF is a link-state routing protocol that divides a network into areas. An area is a logical grouping of routers that share the same link-state information. Area 0 is the backbone area that connects all other areas. A transit network is a special network that connects two different areas. A transit network must belong to Area 0 and have at least two OSPF routers attached to it. A transit network allows traffic from one area to pass through another area without changing the area ID.
References:
https://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/7039-1.html https://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/13703-8.html

HP HPE7-A01 시험