HP HPE6-A85 Online Practice Questions and Exam Preparation

HP HPE6-A85 Online Questions & Answers

• Question 1:

  You are in a meeting with a customer where you are asked to explain the network redundancy feature Multiple Spanning Tree (MSTP). What is the correct statement for this feature?

  A. MSTP configuration ID revision by default as current MSTP root priority
  B. MSTP configuration ID name by default using switch IMC address
  C. MSTP configuration ID name by default using switch serial number
  D. MSTP configuration ID revision by default as switch serial number
  B. MSTP configuration ID name by default using switch IMC address

  ---

  MSTP Multiple Spanning Tree Protocol. MSTP is an IEEE standard protocol for preventing loops in a network with multiple VLANs. MSTP allows multiple VLANs to be mapped to a reduced number of spanning-tree instances. configuration ID consists of two parameters: name and revision. The name is a 32- byte ASCII string that identifies the MSTP region, which is a group of switches that share the same configuration ID and VLAN-to-instance mapping. The revision is a 16-bit number that indicates the version of the configuration ID. By default, the MSTP configuration ID name is set to the switch IMC address, which is a unique identifier derived from the MAC address Media Access Control address. MAC address is a unique identifier assigned to a network interface controller (NIC) for use as a network address in communications within a network segment. of the switch.

  References: https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/mstp/mstp.htm

• Question 2:

  DRAG DROP

  Match the switching technology with the appropriate use case.

  Select and Place:

  

  

  Explanation:

  USE CASE:

  a) Controls the dynamic addition and removal of ports to groups Technology:

  3) LACP USE CASE: b) Tags Ethernet frames with an additional VLAN header Technology:

  1) 802.1Q USE CASE: c) Used to authenticate EAP-Capable client on a switch port Technology:

  2) 802.1X USE CASE: d) Used to identify a voice VLAN to an IP phone Technology:

  4) LLDP The following table summarizes the switching technologies and their use cases: Technology Use case

  1) 802.1Q

  802.1Q is a standard that defines how to create and manage virtual LANs (VLANs) on a network. VLANs allow network administrators to logically segment a network into different broadcast domains, improving security, performance, and manageability. 802.1Q tags Ethernet frames with an additional VLAN header that contains a VLAN identifier (VID), which indicates which VLAN the frame belongs to . 1

  2) 802.1X

  802.1X is a standard that defines how to provide port-based network access control (PNAC) on a network. PNAC allows network administrators to authenticate and authorize devices before granting them access to network resources. 802.1X uses the Extensible Authentication Protocol (EAP) to exchange authentication messages between a supplicant (a device that wants to access the network), an authenticator (a device that controls access to the network, such as a switch), and an authentication server (a device that verifies the credentials of the supplicant, such as a RADIUS server) . 2 3) LACP

  LACP stands for Link Aggregation Control Protocol, which is part of the IEEE 802.3ad standard that defines how to bundle multiple physical links into a single logical link, also known as a link aggregation group (LAG) or an EtherChannel. LAGs provide increased bandwidth, load balancing, and redundancy for network connections. LACP controls the dynamic addition and removal of ports to groups, ensuring that only ports with compatible configurations can form a LAG . 3

  4) LLDP

  LLDP stands for Link Layer Discovery Protocol, which is part of the IEEE 802.1AB standard that defines how to discover and advertise information about neighboring devices on a network. LLDP operates at Layer 2 of the OSI model and uses TLVs (type-length-value) to exchange information such as device name, port number, VLAN ID, capabilities, and power requirements. LLDP can be used to identify a voice VLAN to an IP phone by sending a TLV that contains the voice VLAN ID and priority.

  References:

  1 https://en.wikipedia.org/wiki/IEEE_802.1Q

  2 https://en.wikipedia.org/wiki/IEEE_802.1X

  3 https://en.wikipedia.org/wiki/Link_aggregation https://en.wikipedia.org/wiki/Link_Layer_Discovery_Protocol

• Question 3:

  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
  B. Access-Accept

  ---

  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 the network) 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 4:

  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
  C. Aruba AirMatch

  ---

  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 RF neighborhood 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.pdf https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/arm/AirMatch.htm

• Question 5:

  What does a wireless client do first when its countdown timer reaches zero and it receives a Transmit Opportunity (TXOP)?

  A. It immediately sends its Data Frames and receives an ACK from the AP.
  B. It sends a CTS-to-self announcement to the ESP gateway.
  C. It sends a CTS-to-self announcement to the AP and all other clients.
  D. It sends a reassociation request frame to the AP and sends its Data Frames.
  A. It immediately sends its Data Frames and receives an ACK from the AP.

  ---

  When a wireless client's countdown timer (also known as a backoff timer) reaches zero during contention- based access periods, and it receives a Transmit Opportunity (TXOP), it has the right to transmit its data frames on the medium. After sending the data frames, it expects an acknowledgment (ACK) from the Access Point (AP) to ensure the frames were received successfully.

• Question 6:

  Which type of device type and group persona is required to manage a Microbranch environment?

  A. ArubaOS 10 AP Group Persona
  B. ArubaOS 10 Branch Gateway Group Persona
  C. ArubaOS 8 AP Group Persona
  D. ArubaOS 8 Branch Gateway Group Persona
  B. ArubaOS 10 Branch Gateway Group Persona

  ---

  In the context of Aruba networks, a Microbranch environment is managed using a group persona that aligns with the functionality required. ArubaOS 10 Branch Gateway Group Persona would be the correct device type and group persona for managing a Microbranch environment, as it would provide the necessary features and controls for branch networking requirements.

• Question 7:

  Which scheduling method ensures lowest latency for voice traffic on an ArubaOS-CX switch?

  A. Rate limiting
  B. QoS shaping
  C. DWRR
  D. Strict queuing
  D. Strict queuing

  ---

  Strict queuing prioritizes latency-sensitive traffic, ensuring voice packets are transmitted before other traffic.

• 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
  B. static

  ---

  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:

  What will perform a hard reset of an Aruba CX switch?

  A. Press the reset button and hold the clear button while releasing the reset button for 5 seconds.
  B. Press and hold the reset button for 5 seconds, then release.
  C. Press the reset button and the clear button simultaneously.
  D. Press the reset button three times.
  B. Press and hold the reset button for 5 seconds, then release.

  ---

  Performing a hard reset on an Aruba CX switch typically involves pressing and holding the reset button for a specified amount of time, such as 5 seconds, and then releasing it. This action will initiate a reboot of the switch and return it to factory default settings, including the credentials.

• Question 10:

  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
  C. Signal to Noise Ratio (SNR) decreases

  ---

  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 recover . When the signal from an AP 1 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 band . Therefore, the correct answer is that SNR decreases when the signal from an AP 2 weakens by being absorbed as it moves through an object.

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