HP HP Certifications HPE6-A85 Questions & Answers

• Question 1:

  A network technician has successfully connected to the employee SSID via 802 1X Which RADIUS message should you look for to ensure a successful connection?

  A. Authorized

  B. Access-Accept

  C. Success

  D. Authenticated

  Correct Answer: B

  Explanation: The RADIUS message that you should look for to ensure a successful connection via 802.1X is Access-Accept. This message indicates that the RADIUS server has authenticated and authorized the supplicant (the device that

  wants to access thenetwork) and has granted it access to the network resources. The Access-Accept message may also contain additional attributes such as VLAN ID, session timeout, or filter ID that specify how the authenticator (the device

  that controls access to the network, such as a switch) should treat the supplicant's traffic. The other options are not RADIUS messages because:

  Authorized: This is not a RADIUS message, but a state that indicates that a port on an authenticator is allowed to pass traffic from a supplicant after successful authentication and authorization.

  Success: This is not a RADIUS message, but a status that indicates that an EAP Extensible Authentication Protocol (EAP) is an authentication framework that provides support for multiple authentication methods, such as passwords,

  certificates, tokens, or biometrics. EAP is used in wireless networks and point-to- point connections to provide secure authentication between a supplicant (a device that wants to access the network) and an authentication server (a device that

  verifies the credentials of the supplicant). exchange has completed successfully between a supplicant and an authentication server. Authenticated: This is not a RADIUS message, but a state that indicates that a port on an authenticator has

  received an EAP-Success message from an authentication server after successful authentication of a supplicant.

  References: https://en.wikipedia.org/wiki/RADIUS#Access-Accept

  https://www.cisco.com/c/en/us/support/docs/security-vpn/remote-authentication-dial-user- service-radius/13838-10.html

  https://en.wikipedia.org/wiki/IEEE_802.1X#Port- based_network_access_control

  https://en.wikipedia.org/wiki/Extensible_Authentication_Protocol#EAP_exchange

• Question 2:

  A network technician is troubleshooting one new AP at a branch office that will not receive Its configuration from Aruba Central The other APs at the branch are working as expected The output of the 'show ap debug cloud-server command' shows that the "cloud conflg received" Is FALSE.

  After confirming the new AP has internet access, what would you check next?

  A. Disable and enable activate to trigger provisioning refresh

  B. Verify the AP can ping the device on arubanetworks.com

  C. Verify the AP has a license assigned

  D. Disable and enable Aruba Central to trigger configuration refresh

  Correct Answer: C

  If the AP has internet access but does not receive its configuration from Aruba Central, one possible reason is that the AP does not have a license assigned in Aruba Central. A license is required for each AP to be managed by Aruba Central.

  References:https://www.arubanetworks.com/techdocs/Central/2.5.2- GA/HTML_frameset.htm#GUID-8F0E7E8B-0F4B-4A3C-AE7F-0F1B5A7F9C5D.html

• Question 3:

  What does the status of "ALFOE" mean when checking LACP with "show lacp interfaces'"?

  A. The interface on the local switch is configured as static-LAG

  B. LACP is not configured on the peer side

  C. LACP is in a synchronizing process

  D. LACP is working fine with no problems

  Correct Answer: D

  Explanation: The status of "ALFOE" means that LACP Link Aggregation Control Protocol (LACP) is a network protocol that provides dynamic negotiation of link aggregation between two devices. LACP allows multiple physical links to be combined into a single logical link for increased bandwidth, redundancy, and load balancing. LACP is defined in IEEE 802.3ad standard. is working fine with no problems when checking LACP with "show lacp interfaces". The status of "ALFOE" is an acronym that stands for:

  A: Active - The interface is actively sending LACP packets to negotiate link aggregation with the peer device.

  L: Link Up - The interface has physical connectivity with the peer device.

  F: Aggregatable - The interface can be aggregated with other interfaces into a single logical link.

  O: Synchronized - The interface has successfully negotiated link aggregation parameters with the peer device and can transmit or receive traffic on the logical link.

  E: Collecting/Distributing - The interface is collecting incoming traffic from the peer device and distributing outgoing traffic to the peer device on the logical link.

  The other options are not correct because:

  The interface on the local switch is configured as static-LAG: This option is false because static-LAG does not use LACP to negotiate link aggregation. Static-LAG requires manual configuration of link aggregation parameters on both devices

  and does not have any status indicators.

  LACP is not configured on the peer side: This option is false because if LACP is not configured on the peer side, the status of the interface would be "ALF? instead of "ALFOE". This means that the interface would not be synchronized or

  collecting/distributing with the peer device.

  LACP is in a synchronizing process: This option is false because if LACP is in a synchronizing process, the status of the interface would be "ALF-O" instead of "ALFOE". This means that the interface would not be collecting/distributing with

  the peer device.

  References: https://www.arubanetworks.com/techdocs/AOS- CX_10_08/NOSCG/Content/cx-noscg/lag/lag-overview.htm https://www.arubanetworks.com/techdocs/AOS-CX_10_08/NOSCG/Content/cx- noscg/lag/lag-lacp.htm https:// www.arubanetworks.com/techdocs/AOS- CX_10_08/NOSCG/Content/cx-noscg/lag/lag-lacp-status.htm

• Question 4:

  What happens when the signal from an AP weakens by being absorbed as it moves through an object?

  A. APs will use bonded channels to decrease latency to clients

  B. Signal to Noise Ratio (SNR) increases

  C. Signal to Noise Ratio (SNR) decreases

  D. Aruba Central dynamically moves clients to neighboring APs

  Correct Answer: C

  Explanation: Signal to noise ratio (SNR) is a measure that compares the level of a desired signal to the level of background noise. SNR is defined as the ratio of signal power to the noise power, often expressed in decibels (dB). A high SNR means that the signal is clear and easy to detect or interpret, while a low SNR means that the signal is corrupted or obscured by noise and may be difficult to distinguish or recover1. When the signal from an AP Access Point. AP is a device that allows wireless devices to connect to a wired network using Wi-Fi, or related standards. weakens by being absorbed as it moves through an object, such as a wall or a furniture, the signal power decreases. This reduces the SNR and affects the quality of the wireless connection. The noise power may also increase due to interference from other sources, such as other APs or devices operating in the same frequency band2. Therefore, the correct answer is that SNR decreases when the signal from an AP weakens by being absorbed as it moves through an object.

  References: 1 https://en.wikipedia.org/wiki/Signal-to-noise_ratio 2 https://documentation.meraki.com/MR/Wi-Fi_Basics_and_Best_Practices/Signal-to- Noise_Ratio_%28SNR%29_and_Wireless_Signal_Strength

• Question 5:

  Two independent ArubaOS-CX 6300 switches with Spanning Tree (STP) settings are interconnected with two cables between ports 1/1/1 and 1/1/2 All four ports have "no shutdown" and "no routing" commands

  How will STP forward or discard traffic on these ports?

  A. The switch with the lower MAC address will forward on both ports, while the switch with the higher MAC address will forward on both ports

  B. The switch with the lower MAC address will forward on both ports, while the switch with the higher MAC address will discard on one port

  C. The switch with the lower MAC address will discard on one port, while the switch with the higher MAC address will forward on both ports

  D. The switch with the lower MAC address will discard on one port, while the switch with the higher MAC address will discard on one port

  Correct Answer: D

  Explanation: The way that STP Spanning Tree Protocol. STP is a network protocol that ensures a loop-free topology for any bridged Ethernet local area network by preventing redundant paths between switches or bridges from creating loops

  that cause broadcast storms, multiple frame transmission, and MAC table instability. STP creates a logical tree structure that spans all of the switches in an extended network and blocks any redundant links that are not part of the tree from

  forwarding data packets3. will forward or discard traffic on these ports is as follows:

  STP will elect a root bridge among the two switches based on their bridge IDs, which are composed of a priority value and a MAC address. The switch with the lower bridge ID will become the root bridge and will forward traffic on all its ports.

  STP will assign a role and a state to each port on both switches based on their port IDs, which are composed of a priority value and a port number. The port with the lower port ID will become the designated port and will forward traffic, while

  the port with the higher port ID will become the alternate port and will discard traffic. In this scenario, since both switches have two cables connected between ports 1/1/1 and 1/1/2, there will be two possible paths between them, creating a

  loop. To prevent this loop, STP will block one of these paths by discarding traffic on one of the ports on each switch.

  Assuming that both switches have the same priority value (default is 32768), the switch with the lower MAC address will have the lower bridge ID and will become the root bridge. The root bridge will forward traffic on both ports 1/1/1 and 1/1/2.

  Assuming that both ports have the same priority value (default is 128), port 1/1/1 will have a lower port ID than port 1/1/2 on both switches because it has a lower port number. Port 1/1/1 will become the designated port and will forward traffic,

  while port 1/1/2 will become the alternate port and will discard traffic. Therefore, the switch with the lower MAC address will discard traffic on one port (port 1/1/2), while the switch with the higher MAC address will also discard traffic on one

  port (port 1/1/2).

  References: 3 https://en.wikipedia.org/wiki/Spanning_Tree_Protocol

• Question 6:

  You need to troubleshoot an Aruba CX 6200 4-node VSF stack switch that fails to boot correctly Select the option that allows you to access the switch and see the boot options available for OS images and ServiceOS.

  A. Member 2 RJ-45 console port

  B. Member 2 switch mgmt port

  C. Conductor USB-C console port D. Conductor mgmt port using SSH

  Correct Answer: C

  Explanation: The option that allows you to access the switch and see the boot options available for OS images and ServiceOS is Conductor USB-C console port. This option provides direct access to ServiceOS, which is an operating system

  that runs on Aruba CX switches independently of AOS-CX Aruba Operating System CX (AOS-CX) is an operating system that runs on Aruba CX switches . ServiceOS provides low-level functions such as booting, firmware upgrades,

  password recovery, hardware diagnostics, switch stacking, and system recovery. ServiceOS can be accessed through one of two methods:

  Conductor USB-C console port: This method allows you to connect your PC or laptop to the USB-C console port on any member switch in a VSF stack using a USB-C cable. This method provides direct access to ServiceOS without requiring

  any configuration or authentication on AOS-CX.

  AOS-CX CLI: This method allows you to access ServiceOS through AOS-CX CLI using SSH or Telnet protocols. This method requires you to configure an IP address on AOS-CX and authenticate with your username and password. To see

  the boot options available for OS images and ServiceOS, you need to access ServiceOS through Conductor USB-C console port and enter boot menu command at ServiceOS prompt.

  The other options do not allow you to access the switch and see the boot options available for OS images and ServiceOS because:

  Member 2 RJ-45 console port: This option allows you to connect your PC or laptop to the RJ-45 console port on any member switch in a VSF stack using an RJ-45 cable. This option provides direct access to AOS-CX CLI, not ServiceOS.

  Member 2 switch mgmt port: This option allows you to connect your PC or laptop to the switch mgmt port on any member switch in a VSF stack using an Ethernet cable. This option provides indirect access to AOS-CX CLI through SSH or

  Telnet protocols, not ServiceOS.

  Conductor mgmt port using SSH: This option allows you to connect your PC or laptop to the mgmt port on any member switch in a VSF stack using an Ethernet cable. This option provides indirect access to AOS-CX CLI through SSH protocol,

  not ServiceOS.

  References: https://www.arubanetworks.com/techdocs/AOS- CX_10_08/NOSCG/Content/cx-noscg/serviceos/serviceos-overview.htm

  https://www.arubanetworks.com/techdocs/AOS-CX_10_08/NOSCG/Content/cx- noscg/serviceos/access-serviceos.htm

  https://www.arubanetworks.com/techdocs/AOS- CX_10_08/NOSCG/Content/cx-noscg/serviceos/boot-menu.htm

• Question 7:

  When performing live firmware upgrades on Aruba APs. which technology partitions all the APs based on RF neighborhood data minimizing the impact on clients?

  A. Aruba ClientMatch

  B. Aruba Ai insights

  C. Aruba AirMatch

  D. Aruba ESP

  Correct Answer: C

  Explanation: Aruba AirMatch is a feature that optimizes RF Radio Frequency. RF is any frequency within the electromagnetic spectrum associated with radio wave propagation. When an RF current is supplied to an antenna, an

  electromagnetic field is created that then is able to propagate through space. performance and user experience by using machine learning algorithms and historical data to dynamically adjust AP power levels, channel assignments, and

  channel width. AirMatch performs live firmware upgrades on Aruba APs by partitioning all the APs based on RFneighborhood data and minimizing the impact on clients. AirMatch uses a rolling upgrade process that upgrades one partition at a

  time while ensuring that adjacent partitions are not upgraded simultaneously.

  References:

  https://www.arubanetworks.com/assets/ds/DS_AirMatch.pdfhttps://www.arubanetworks.co m/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/arm/AirMatch.htm

• Question 8:

  Based on the "snow ip route" output on an AruDaCX 8400. what type of route is "10.1 20 0/24, vrf default via 10.1.12.2. [1/0]"?

  A. local

  B. static

  C. OSPF

  D. connected

  Correct Answer: B

  Explanation: A static route is a route that is manually configured on a router or switch and does not change unless it is modified by an administrator. Static routes are used to specify how traffic should reach specific destinations that are not directly connected to the device or that are not reachable by dynamic routing protocols. In Aruba CX switches, static routes can be configured using the ip route command in global configuration mode. Based on the "show ip route" output on an Aruba CX 8400 switch, the route "10.1 20 0/24, vrf default via 10.1.12.2, [1/0]" is a static route because it has an administrative distance of 1 and a metric of 0, which are typical values for static routes.

  References: https://en.wikipedia.org/wiki/Static_routing https://www.arubanetworks.com/techdocs/AOS- CX_10_04/NOSCG/Content/cx-noscg/ip-routing/static- routes.htm https://www.arubanetworks.com/techdocs/AOS-CX_10_04/NOSCG/Content/cx- noscg/ip-routing/show-ip-route.htm

• Question 9:

  Which flew in a Layer 3 IPv4 packet header is used to mitigate Layer 3 route loops?

  A. Checksum

  B. Time To Live

  C. Protocol

  D. Destination IP

  Correct Answer: B

  Explanation: The field in a Layer 3 IPv4 packet header that is used to mitigate Layer 3 route loops is Time To Live (TTL). TTL is an 8-bit field that indicates the maximum number of hops that a packet can traverse before being discarded. TTL is set by the source device and decremented by one by each router that forwards the packet. If TTL reaches zero, the packet is dropped and an ICMP Internet Control Message Protocol (ICMP) Internet Control Message Protocol (ICMP) is a network protocol that provides error reporting and diagnostic functions for IP networks. ICMP is used to send messages such as echo requests and replies (ping), destination unreachable, time exceeded, parameter problem, source quench, redirect, etc. ICMP messages are encapsulated in IP datagrams and have a specific format that contains fields such as type, code, checksum, identifier, sequence number, data, etc. ICMP messages can be verified by using commands such as ping , traceroute , debug ip icmp , etc . message is sent back to the source device. TTL is used to mitigate Layer 3 route loops because it prevents packets from circulating indefinitely in a looped network topology. TTL also helps to conserve network resources and avoid congestion caused by looped packets. The other options are not fields in a Layer 3 IPv4 packet header because: Checksum: Checksum is a 16-bit field that is used to verify the integrity of the IP header. Checksum is calculated by the source device and verified by the destination device based on the values of all fields in the IP header. Checksum does not mitigate Layer 3 route loops because it does not limit the number of hops that a packet can traverse. Protocol: Protocol is an 8-bit field that indicates the type of payload carried by the IP datagram. Protocol identifies the upper-layer protocol that uses IP for data transmission, such as TCP Transmission Control Protocol (TCP) Transmission Control Protocol (TCP) is a connection-oriented transport layer protocol that provides reliable, ordered, and error-checked delivery of data between applications on different devices . TCP uses a three-way handshake to establish a connection between two endpoints , and uses sequence numbers , acknowledgments , and windowing to ensure data delivery and flow control . TCP also uses mechanisms such as retransmission , congestion avoidance , and fast recovery to handle packet loss and congestion . TCP segments data into smaller units called segments , which are encapsulated in IP datagrams and have a specific format that contains fields such as source port , destination port , sequence number , acknowledgment number , header length , flags , window size , checksum , urgent pointer , options , data , etc . TCP segments can be verified by using commands such as telnet , ftp , ssh , debug ip tcp transactions , etc . , UDP User Datagram Protocol (UDP) User Datagram Protocol (UDP) is a connectionless transport layer protocol that provides

• Question 10:

  You need to configure wireless access for several classes of loT devices, some of which operate only with 802 11b. Each class must have a unique PSK and will require a different security policy applied as a role There will be 15-20 different classes of devices and performance should be optimized

  Which option fulfills these requirements''

  A. Single SSID with MPSK for each loT class using 5 GHz and 6 GHz bands

  B. Single SSID with MPSK for each loT class using 2.4GHz and 5 GHz bands

  C. Individual SSIDs with unique PSK for each loT class, using 5GHz and 6 GHz bands

  D. Individual SSIDs with unique PSK for each loT class, using 2.4GHZ and 5GHz band

  Correct Answer: D

  Explanation: The option that fulfills the requirements is to create individual SSIDs with unique PSK for each loT class, using 2.4 GHz and 5 GHz band. This option provides the following benefits:

  Each loT class has a unique PSK that can be used to apply a different security policy as a role. This enhances the security and flexibility of the WLAN network. Individual SSIDs allow for better isolation and management of different loT

  classes. This improves the performance and scalability of the WLAN network. Using both 2.4 GHz and 5 GHz bands allows for backward compatibility with loT devices that operate only with 802.11b, which uses the 2.4 GHz band1. It also

  allows for higher throughput and less interference for loT devices that support 802.11a, 802.11g, 802.11n, or 802.11ac, which use the 5 GHz band2. The other options do not fulfill the requirements because:

  Single SSID with MPSK for each loT class using 5 GHz and 6 GHz bands: This option does not support loT devices that operate only with 802.11b, which uses the 2.4 GHz band1. It also does not optimize the performance of the WLAN

  network, as a single SSID may cause co-channel interference and congestion among different loT classes.

  Single SSID with MPSK for each loT class using 2.4 GHz and 5 GHz bands: This option does not optimize the performance of the WLAN network, as a single SSID may cause co-channel interference and congestion among different loT

  classes. Individual SSIDs with unique PSK for each loT class, using 5 GHz and 6 GHz bands: This option does not support loT devices that operate only with 802.11b, which uses the 2.4 GHz band1.

  References: 1 https://en.wikipedia.org/wiki/IEEE_802.11b-1999 2 https://www.lifewire.com/wireless-standards-802-11a-802-11b-g-n-and-802-11ac-816553