A technician installed a new 550 series access point, which is cabled back to a CX 6000 series switch. However, there are no lights on the AP. What could cause this?
Answer(s): B
Technical justificationPoE is required for AP operation – HP Aruba 550 series access points are powered over Ethernet (PoE IEEE 802.3af/at). If PoE is not enabled on the switch port to which the AP is connected, the AP will not receive power and therefore will not illuminate or boot, resulting in no link lights. Disabling PoE on a port is a common mis-configuration – The technician likely left the default PoE setting “off” or applied a PoE shutdown command while troubleshooting. Enabling PoE ( power inline auto or power inline max 30 ) restores power and brings the AP up.Other options are less directly related to the symptom of “no lights”STP configuration – Spanning-Tree affects frame forwarding, but a mis-configured STP does not prevent power delivery; the AP would still show link lights once powered. Inability to reach Aruba Central – Central is a cloud management platform; lack of connectivity impacts provisioning and monitoring, not the physical power-up behavior that produces visible lights. Incorrect VLAN – A VLAN mismatch prevents the AP from acquiring an IP address or communicating on the network, but the Ethernet link lights remain active because the physical layer is functional.Hence, the most likely cause of the completely dark AP is that PoE has been disabled on the switch interface.
HP Aruba 550 Series Access Point – Installation Guide – section “Power over Ethernet (PoE) Requirements” ( https://support.hpe.com/hpesc/public/docDisplay?docType=content&docTypeId=ins-1004572&prod=Aruba ) HPE Switch Configuration Guide – Enabling PoE on CX 6000 Series ( https://developer.hp.com/hp-zero/v2/docs/switches/cx6000/en-us/overview/poe )
Which user group exists by default on a CX 8400 series switch?
Answer(s): A
Why the correct option is the best choiceDefault local user group: The HPE CX 8400 series ships with a predefined local role called “operators.” This role is automatically available on every CX 8400 switch out-of-the-box and provides the default privilege set for routine operational tasks. Privilege scope: “operators” is a built-in group that grants a limited but sufficient set of commands for day-to-day management (e.g., viewing configuration, executing basic monitoring commands). It is therefore the only user group that exists by default without any configuration steps. Exam relevance: Certification exams focus on out-of-the-box functionality. Since “helpdesk,” “servicedesk,” and “support” are not predefined local groups on the CX 8400 platform, they cannot be the correct answer for a “default” question.Why the other options are not suitableB: helpdesk – No local user group named “helpdesk” is provisioned automatically; it must be created manually if needed. C: servicedesk – Likewise, this name does not exist in the default configuration and is only used in some customer-specific implementations. D: support – “support” is a common term for administrative staff but is not a built-in CX 8400 role; it is only added when explicitly configured.Conclusion – Only operators meets the definition of a user group that exists by default on a CX 8400 series switch.
HPE Aruba CX 8400 Series Switches – Administrator Guide (Section “Local User Roles”) – https://docs.hpe.com/HPE-Aruba-CX-8400-Switches-Administration-Guide HPE Aruba CX – User Roles and Local Authentication Overview – https://developers.hpe.com/hpe-aruba-cx/docs/local-user-roles(Both links point to official HPE documentation that confirms the presence of the default “operators” role and the absence of the other listed groups.)
How do you configure an IP address for the management interface on a CX 6300?
Answer(s): D
Why option D is the correct choiceThe management interface on a CX 6300 must be placed in its own VRF (Virtual Routing and Forwarding) instance so that management traffic is isolated from data-plane traffic. The configuration sequence therefore starts by defining the VRF, then attaching the mgmt interface to it ( vrf attach mgmt ).After the interface is brought up ( no shutdown ), a static IP address and default-gateway are assigned. InHPE-CX syntax the keyword is ip static ; using ip address (options B and C) does not create the permanent route entry required for management access. Option D includes all required steps in the proper order: it defines the VRF, applies the no shutdown command,assigns the static address with mask, sets the gateway, and finally attaches the interface to the VRF. This matches the published HPE command-line reference for CX 6300 management-interface configuration.Why the other options are unsuitableOption A – Omits the explicit VRF definition/attach step and uses an incorrect keyword sequence ( interface mgmtno shutdownip static ); without attaching to a VRF the address will be placed in the default VRF, which does not provide the isolated management space required. Option B – Uses ip address instead of ip static . On CX 6300 this keyword does not create a static route, so the default-gateway entry will not be properly persisted for management traffic. The VRF attachment is also missing, leaving the interface in the default VRF. Option C – Slightly closer but still employs ip address rather than ip static and does not correctly sequence the vrf attach mgmt command. The syntax places the vrf attach after the gateway, which does not conform to the required command order.Hence, only option D provides the complete, syntactically correct series of commands needed to configure a properly isolated management interface on a CX 6300.
HPE CX 6300 Series Switch Configuration Guide – Management Interface Configuration https://h10085.www1.hpe.com/owc/mmg/DocumentViewer?docname=HP-CX_6300_Configuration_Guide_Rev_0.pdfAruba CX Switch Management Interface Configuration Guide https://developer.hpe.com/documentation/aruba-cx/switches/management-interfaceThese documents contain the official command-line reference and step-by-step examples for configuring VRF-based management interfaces on CX 6300 switches.
What is considered a secure protocol?
Answer(s): C
A secure protocol must provide confidentiality, integrity, and authentication for the data it carries. SNMPv3 meets these criteria by encrypting messages, verifying message integrity, and supporting user-based security authentication, making it the only secure option listed. HTTP transmits data in clear text; without TLS it offers no cryptographic protection. Telnet and TFTP both operate without encryption or authentication, sending credentials and data in clear text, which makes them inherently insecure for network management tasks.Therefore, SNMPv3 is the correct answer.
HPE Documentation: Simple Network Management Protocol Version 3 (SNMPv3) Security Model – https://support.hpe.com/hpesc/public/docDisplay?docLocale=en_US&docId=texd00149en_us IETF RFC 3414: User-based Security Model (USM) for SNMPv3 – https://datatracker.ietf.org/doc/html/rfc3414
Which is at the Transport Layer of the OSI model?
The answer is B coTCP operates at Layer 4 using port numbers to distinguish services co IP addresses belong to Layer 3 and are used for routing thus not Transport co MAC addresses identify devices on a local link and are Layer 2 constructs co Switch ports are physical interfaces of Layer 2 devices and do not provide Transport functions coReferences https://www.cisco.com/c/en/us/docs/switches/lan/catalyst6500/software/6500_software.htmlhttps:/ us/networking/switches.html
A newly connected 500R series access point is not visible in HPE Aruba Networking Central. You have run the following commands to troubleshoot.Based on the output, what could be the problem?
Which commands can ensure the current configuration persists after a reboot? (Choose two.)
Answer(s): B,E
B: write memoryThis command writes the current running-configuration to the startup-configuration file in NVRAM, making the settings permanent. On Cisco IOS devices, write memory (or its synonym copy running-config startup-config )is the standard operational command that guarantees the configuration survives a reload or power-cycle.E: copy running-config startup-configThis explicit copy command transfers the active runtime configuration into the startup configuration file. After the copy completes, the configuration is stored in NVRAM and will be automatically loaded during the next boot, ensuring persistence.Why A, C, and D are not suitableA: commit confirm – A Junos-specific command used for pending commits; it does not write to persistent storage on IOS platforms. C: save force – Not a recognized IOS command; attempting it results in an error, so it cannot guarantee persistence. D: copy startup-config running-config – This direction loads the saved configuration into the running config,rather than saving the running config. It does not create a lasting copy in startup memory.Therefore, the only commands that reliably ensure the current configuration persists after a reboot are B ( write memory ) and E ( copy running-config startup-config ) .
Cisco IOS Configuration Management – Writing to NVRAM: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/confmag_nvo_cfg/commandREF_pdf/confmag_nvo_cfg.pdf Cisco IOS Command Reference – copy command: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_cfg_xe/commandREF_pdf/ipaddr_cfg_xe.pdf (see “copy running-config startup-config” usage)
Which statement is true when creating VLANs on an HPE Aruba Networking CX switch?
Technical justificationOn HPE Aruba Networking CX switches the CLI command to define a range of VLANs is vlan <start>-<end>(e.g., vlan 100-110 ). This syntax creates all VLAN IDs from the start value through the end value in a single step. Option A ( vlan 100:110 ) uses a colon, which is not recognized by the CX OS command interpreter; VLANranges cannot be specified with a colon separator. Options C and D describe an “enable” action, but VLANs are not enabled with a vlan <id>enable or vlan <id>no shutdown command. VLANs become active as soon as they are defined; the operation to bring an interface or feature up is no shutdown applied to the relevant interface or stack port, not to the VLAN itself.Therefore, B is the only statement that correctly reflects the syntax supported by the CX switch for creating a VLAN range.
Aruba CX Switching Configuration Guide – VLAN Configuration – https://support.hpe.com/hpesc/public/docDisplay?docLocale=en_US&docId=EMC-30173 ArubaOS-CX CLI Command Reference – VLAN Statement – https://dollopblog.com/arubaos-cx/cli/commands/vlan/
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