Summary:
The Network Analytics Engine (NAE) on AOS-CX switches uses scripts to monitor events and trigger actions. Simply installing a script onto the switch's filesystem does not activate it. To execute the monitoring logic, you must instantiate the script by creating an "agent." This agent is a running process that loads the script, defines its operational parameters (like which interfaces to monitor), and begins the specified data collection and event analysis.

Correct Option:

D. Create an agent from the script.
This is the mandatory step to start monitoring. An NAE script is a template containing the monitoring logic. Creating an agent instantiates this template into a running process on the switch. The agent creation command (e.g., nae agent create) specifies the script to run and any required arguments, which launches the monitoring function. Without an active agent, the script remains inert and performs no monitoring.

Incorrect Option:

A. Reboot the switch.
This is incorrect and unnecessary. A reboot is not required to start an NAE script. Agents can be created, started, stopped, and deleted dynamically without impacting the core switching functions or requiring a system restart. A reboot would actually terminate any running agents.

B. Enable NAE, which is disabled by default.
This is incorrect. The NAE framework is an integral part of AOS-CX and is enabled by default. There is no global configuration command to enable or disable the NAE subsystem itself. The operational control is at the agent level (creating, starting, stopping agents), not the engine level.

C. Edit the script to define monitor parameters.
This is incorrect. While a script must be written to accept parameters, the act of defining or supplying those specific parameters (e.g., an interface name, a threshold value) happens during the agent creation step, not by editing the source script file itself. The command to create the agent includes the arguments that are passed to the script.

Reference:
HPE Aruba Networking CX Network Analytics Engine Guide

The official documentation outlines the workflow of creating an agent from a script to begin monitoring and analytics.

Link: HPE Aruba Networking NAE for AOS-CX Guide (See sections on "Managing NAE Agents")

Summary:
The Online Certificate Status Protocol (OCSP) is a method for checking the revocation status of a digital certificate. Unlike its predecessor, the Certificate Revocation List (CRL), which is a periodically published list of all revoked certificates, OCSP provides a real-time, query-based response. Its primary benefit is efficiency and timeliness, as a client can request the status of a single, specific certificate and receive an immediate "good," "revoked," or "unknown" response from an OCSP responder, without needing to download and process a potentially large CRL file.

Correct Option:

A. It lets a device query whether a single certificate is revoked or not.
This is the core benefit and function of OCSP. When a client or service validates a certificate, it can send a lightweight query containing the certificate's serial number to an OCSP responder. The responder checks its database and returns a signed response regarding that specific certificate's status. This is far more efficient than downloading and parsing a full CRL, especially for organizations with a large number of certificates.

Incorrect Option:

B. It lets a device dynamically renew its certificate before the certificate expires.
This is incorrect. Certificate renewal is an entirely separate process managed by a Certificate Authority (CA) or a registration authority. It typically involves generating a new key pair, creating a new Certificate Signing Request (CSR), and going through a validation process. OCSP has no role in the issuance or renewal of certificates; it is solely for checking the revocation status of existing certificates.

C. It lets a device download all the serial numbers for certificates revoked by a CA at once.
This is incorrect. This description defines a Certificate Revocation List (CRL), not OCSP. A CRL is a file published by the CA at a predefined URL that contains a list of all revoked, unexpired certificates. OCSP was designed as a more efficient alternative to CRLs to avoid the need for clients to download and process these often-large lists.

D. It lets a device determine whether to trust a certificate without needing any root certificates installed.
This is incorrect. Trust is always rooted in a chain of certificates that ultimately leads to a trusted Root CA certificate installed on the local device. OCSP does not replace this requirement. The OCSP response itself must be signed by a trusted OCSP signing certificate, and the validation of that signature relies on the client having the appropriate root or intermediate CA certificates installed to establish trust.

Reference:
ArubaOS-CX Security Configuration Guide

While not a direct configuration step for OCSP clients, the protocol is a fundamental part of PKI and is referenced in contexts like 802.1X and VPNs that use EAP-TLS. The underlying principle is standard across implementations.

Link: HPE Aruba Networking CX Security Guide (See content on PKI and certificate validation)

Summary:
The AOS-CX switch has a pre-configured local user role named "employees" that is assigned to a specific VLAN. The goal is for ClearPass to instruct the switch to apply this existing local role to an authenticated user. This is achieved by having ClearPass send a specific Vendor-Specific Attribute (VSA) in the RADIUS Access-Accept message. The correct VSA tells the switch which pre-configured local user role to apply, leveraging the Local User Role (LUR) method.

Correct Option:

D. RADIUS Enforcement type with Aruba-User-Role VSA set to "employees"
This is correct. The Aruba-User-Role is the standard RADIUS VSA used to assign a pre-configured local user role on Aruba infrastructure, including AOS-CX switches. By creating a RADIUS Enforcement profile in ClearPass and setting this attribute's value to "employees," ClearPass will send this instruction to the switch upon successful authentication. The switch will then apply the locally defined "employees" role, which includes the vlan access name employees setting.

Incorrect Option:

A. RADIUS Enforcement type with HPE-User-Role VSA set to "employees"
This is incorrect. While "HPE" is a valid vendor prefix, the specific and standardized attribute name for assigning a user role on ArubaOS and AOS-CX devices is Aruba-User-Role, not HPE-User-Role. Using the incorrect attribute name will result in the switch ignoring the role assignment.

B. HPE Aruba Networking Downloadable Role Enforcement type with role name set to "employees"
This is incorrect. The "Downloadable Role" enforcement type is used for Downloadable User Roles (DURs), not Local User Roles (LURs). A DUR sends the complete role configuration (including ACLs and VLAN settings) from ClearPass to the switch. In this scenario, the role "employees" and its VLAN setting are already configured locally on the switch, so the DUR method is not being used.

C. HPE Aruba Networking Downloadable Role Enforcement type with gateway role name set to "employees"
This is incorrect for the same reason as option B. This enforcement type is for DURs. Furthermore, the term "gateway role name" is more specific to controller-based gateway environments (like Mobility Conductors), not standalone AOS-CX switches. The configuration shown uses the local port-access role command, which aligns with the LUR method and the Aruba-User-Role VSA.

Reference:
HPE Aruba Networking ClearPass Policy Manager User Guide

The official documentation details the different enforcement types and the specific VSAs used for Aruba devices, including the Aruba-User-Role for local role assignment.

Link: HPE Aruba Networking ClearPass Documentation Portal (See sections on "Enforcement Profiles" and "RADIUS Vendors and Dictionaries")

Summary:
ClearPass Device Insight (CPDI) discovers and classifies devices on the network, and it can assign custom or system-generated labels called "Tags" to these devices. To use these tags within a ClearPass Policy Manager (CPPM) access policy, the policy rule must look for the tag information stored in the "Endpoint" context. The Endpoint namespace contains attributes about the physical device itself, such as its profile, category, and the specific tags assigned to it by CPDI.

Correct Option:

D. Endpoint
This is correct because the Tags assigned by ClearPass Device Insight are attributes of the endpoint (the device). When creating a rule in a role mapping or enforcement policy, you must select the "Endpoint" namespace to access attributes like Endpoint.DeviceInsightTags or Endpoint.Tags. This allows the policy to check if a specific tag (e.g., "Authorized-IoT") is associated with the connecting device and make an authorization decision based on that information.

Incorrect Option:

A. Application
This is incorrect. The "Application" namespace is used for attributes related to specific applications or services that might be integrated with ClearPass, such as an external MDM system. It does not contain the device inventory and tagging information provided by ClearPass Device Insight.

B. Tips
This is incorrect. The "Tips" namespace is used for special, real-time contextual information and functions within the policy, such as posture status (Tips:Posture), location context, or other dynamic session attributes. It is not used for stored inventory attributes like device tags.

C. Device
This is a distractor and is incorrect. While intuitively it might seem correct, the specific namespace used in CPPM policies for attributes related to the physical hardware is "Endpoint," not "Device." The "Device" namespace is not a standard primary namespace for CPDI tags within access policy rules.

Reference:
HPE Aruba Networking ClearPass Policy Manager User Guide

The official documentation on policy configuration details the available namespaces and their attributes. The "Endpoint" namespace is explicitly described as containing attributes from the endpoint context, including profiling and ClearPass Device Insight data.

Link: HPE Aruba Networking ClearPass Documentation Portal (See sections on "Policy Manager Rules" and "Using Attributes in Policies")

Summary:
TACACS+ is used for administrative access to network devices, providing authorization for specific commands. In ClearPass, command authorization is not configured directly on the service or in network device entries, but within TACACS+ Enforcement Profiles. These profiles define the privileges for a role. To begin configuring a list of permitted or denied commands, you must first add the "Shell" service to a TACACS+ enforcement profile. This action reveals the command authorization fields where you can build the command set.

Correct Option:

AA. Add the Shell service to the managers' TACACS+ enforcement profiles.
This is the correct first step. A TACACS+ enforcement profile in ClearPass is initially empty. To configure command authorization, you must add a service of type "Shell" to the profile. This adds the necessary configuration sections, including "Default Privilege" and, crucially, "Command Rules." Within the Command Rules section, you can then define the specific list of commands that are permitted or denied for managers assigned to that enforcement profile.

Incorrect Option:

B. Edit the TACACS+ settings in the AOS-CX switches' network device entries.
This is incorrect. The network device entry in ClearPass is used to define the shared TACACS+ secret and the IP address of the switch. It establishes the communication link between the switch and ClearPass but does not contain any fields for configuring command authorization policies. Command control is an authorization function handled by the enforcement profile.

C. Create an enforcement policy with the TACACS+ type.
This is incorrect and describes a misunderstanding of the ClearPass policy structure. An Enforcement Policy is a set of rules that determines which Enforcement Profile to apply. You create a policy rule that points to a profile. The command list itself is configured within the TACACS+ Enforcement Profile, not the policy that selects it. Creating a policy alone does not provide the interface to enter commands.

D. Edit the settings for CPPM's default TACACS+ admin roles.
This is incorrect. ClearPass has built-in administrative roles for managing ClearPass itself (like "Administrator," "Monitor"). These roles control access to the ClearPass GUI/API and are separate from the TACACS+ command authorization used for network devices like AOS-CX switches. You configure custom command sets for network admins in custom TACACS+ enforcement profiles, not by modifying the internal ClearPass admin roles.

Reference:
HPE Aruba Networking ClearPass Policy Manager User Guide

The official documentation details the steps to configure TACACS+ command authorization, specifically highlighting the need to add the "Shell" service to an enforcement profile to access the command rule configuration.

Link: HPE Aruba Networking ClearPass Documentation Portal (See sections on "Configuring TACACS+ Enforcement Profiles" and "Command Authorization")

Summary:
This scenario involves a VoIP phone connecting to an 802.1X-enabled port with a PC likely connected behind the phone. The phone needs to send traffic tagged with VLAN 12. In the AOS-CX VSF/CX switching world, the dynamic assignment of the voice VLAN is handled within the user role, not with static switchport voice vlan commands. The role assigned to the phone (the "voice" role) must specify VLAN 12 as its allowed VLAN, which acts as the tagged voice VLAN. The edge port itself is configured as a general or trunk port to allow these tagged frames.

Correct Option:

D. As the allowed trunk VLAN in the "voice" role (and not in the edge port settings)
This is correct. On AOS-CX switches, the voice VLAN is dynamically assigned via the user role. The "voice" role should be configured with the vlan trunk allowed 12 command. When the phone authenticates and is assigned the "voice" role, the switch will permit frames tagged with VLAN 12 from that device. The physical edge port must be configured as a trunk port (switchport mode trunk) to allow tagged frames, but the specific VLAN 12 does not need to be statically allowed on the port; it is dynamically permitted by the role.

Incorrect Option:

A. As the trunk native VLAN on edge ports and the trunk native VLAN on the "voice" role
This is incorrect. The native VLAN is for untagged traffic. VoIP phone traffic is typically tagged. Configuring VLAN 12 as the native VLAN would mean the phone should send untagged traffic, which is not standard practice. Furthermore, assigning the native VLAN in the role is not the mechanism for voice VLAN assignment.

B. As a trunk allowed VLAN on edge ports and the trunk native VLAN in the "voice" role
This is incorrect and mixes concepts. While statically allowing VLAN 12 on the trunk port would work, it is not necessary with dynamic roles and bypasses the centralized policy. More importantly, defining VLAN 12 as the native VLAN in the "voice" role is wrong, as it would instruct the phone to use an untagged PVID for its voice traffic, which is incorrect.

C. As the trunk native VLAN in the "voice" role (and not in the edge port settings)
This is incorrect. As explained above, the native VLAN is for untagged traffic. VoIP phones send tagged traffic. Configuring the voice VLAN as the native VLAN in the role would not achieve the goal of having the phone tag its traffic for VLAN 12. The correct command in the role is vlan trunk allowed.

Reference:
HPE Aruba Networking CX Security Configuration Guide

The official documentation details how to configure user roles for dynamic voice VLAN assignment using the vlan trunk allowed command within the role configuration.

Link: HPE Aruba Networking CX Security Guide (See content on "Configuring 802.1X" and "User Roles")

Summary:
The requirement is to analyze a specific device's communication behavior, including metrics like the number of unique destinations it contacts. This is a function of network traffic analysis and flow monitoring. ClearPass Device Insight (CPDI) is specifically designed for this purpose. It performs deep packet inspection and NetFlow/sFlow analysis to build a detailed profile of each device, which includes a "Network Activity" view showing communication patterns, top talkers, protocols used, and the volume of connections to different destinations.

Correct Option:

C. HPE Aruba Networking ClearPass Device Insight (CPDI) under a device's network activity
This is correct. ClearPass Device Insight goes beyond basic discovery and profiling. Its core function is to monitor and analyze network traffic flows for each endpoint. Within the CPDI dashboard, when you drill down into a specific device's details, the "Network Activity" or similar section provides a clear, at-a-glance view of its communication patterns, including the number of destinations, source/destination IPs, ports, and protocols, allowing the security team to track its behavior.

Incorrect Option:

A. HPE Aruba Networking ClearPass Insight Endpoints and Network Dashboards
This is incorrect. ClearPass Insight (now often integrated into the main UI) provides high-level reporting and dashboards on ClearPass service usage, authentication trends, and overall network health. It is focused on the performance and logging of the ClearPass policy manager itself, not on the detailed communication patterns of individual endpoints on the network.

B. HPE Aruba Networking ClearPass Policy Manager (CPPM) live monitoring Access Tracker
This is incorrect. The Access Tracker tool in CPPM is designed for real-time troubleshooting of authentication and authorization sessions. It shows details like who is authenticating, what service they are using, and what role they were assigned. It is a session and policy tool, not a network traffic flow analysis tool. It does not show how many destinations a device is communicating with.

D. AOS-CX Analytics Dashboard using the system-installed NAE agent
This is incorrect. The Network Analytics Engine (NAE) on AOS-CX switches is used for automated operational scripting and monitoring switch-level events (e.g., interface errors, CPU spikes). While it can be scripted to monitor traffic, its dashboard is not designed to provide an at-a-glance, centralized view of individual endpoint communication patterns across the network. CPDI is the dedicated solution for this security-focused visibility.

Reference:
HPE Aruba Networking ClearPass Device Insight

The official product page and datasheets highlight its capabilities in monitoring endpoint network activity and communication patterns for security analysis.

Link: HPE Aruba Networking ClearPass Device Insight

Summary:
The requirement is for ClearPass to dynamically change a client's access level (enforcement profile) based on new information, such as a change in device posture or profile, after the initial login. This is achieved through a RADIUS function called Change of Authorization (CoA). For CoA to work, the network equipment (the APs in this case) must be able to accept and act on CoA commands sent from ClearPass. This capability is enabled by configuring Dynamic Authorization on the APs, which opens a separate listening port for these re-authorization requests.

Correct Option:

B. In the RADIUS server settings for CPPM, enable Dynamic Authorization.
This is correct. Enabling Dynamic Authorization on the APs for the ClearPass RADIUS server entry is the essential step. This configuration instructs the APs to listen for CoA packets from ClearPass. When ClearPass determines that a client's session needs to be re-evaluated (e.g., posture changes from "Healthy" to "Quarantine"), it sends a CoA request to the AP. The AP then forces the client to re-authenticate, allowing ClearPass to apply a new enforcement profile based on the updated information.

Incorrect Option:

A. In the security settings, configure dynamic denylisting.
This is incorrect. Dynamic denylisting (or blacklisting) is a feature that temporarily blocks clients based on failed authentication attempts or other attack signatures. It is a reactive security measure and is not the mechanism used for dynamically updating a live, authenticated client's access permissions based on changing attributes from ClearPass.

C. In the WLAN profiles, enable interim RADIUS accounting.
This is incorrect. Interim accounting updates are periodic messages sent from the AP to the RADIUS server to report session statistics (duration, data usage). While ClearPass can use accounting data for monitoring and reporting, it is a one-way communication from the AP to ClearPass. It is not the mechanism for ClearPass to initiate a change (CoA) back to the AP. CoA and accounting are separate RADIUS functions.

D. In the RADIUS server settings for CPPM, enable querying the authentication status.
This is incorrect. There is no standard RADIUS setting called "querying the authentication status" on the AP. This option does not facilitate the bidirectional communication required. The ability for ClearPass to push a re-authentication command to the AP is handled by the Dynamic Authorization (CoA) client configuration on the AP, not a status query.

Reference:
HPE Aruba Networking Central AOS-10 Configuration Guide

The official documentation for configuring APs in Central details the steps to enable Dynamic Authorization for a RADIUS server to support Change of Authorization (CoA).

Link: HPE Aruba Networking Central Documentation (See content on "Configuring RADIUS Servers" and "Dynamic Authorization")

Summary:
DHCP Snooping and Dynamic ARP Inspection (DAI) rely on a binding table that is built dynamically. The DHCP Snooping Binding Table contains mappings of IP addresses to MAC addresses learned from DHCP transactions. When the switch reboots, this table is lost, causing DAI to drop all ARP packets until new DHCP leases are obtained, which disrupts network connectivity. To minimize this disruption, the binding table can be saved to non-volatile (external) storage and reloaded upon reboot, allowing DAI to function immediately.
Correct Option:

C. Save the IP-to-MAC bindings to external storage.
This is correct. AOS-CX provides a feature to save the dynamically learned DHCP snooping binding table to the switch's flash memory or an external storage location. Upon reboot, the switch can reload these bindings, repopulating the table. This allows Dynamic ARP Inspection (DAI) to validate ARP packets immediately, preventing a network outage while waiting for clients to renew their DHCP leases. This directly minimizes disruption time after a reboot.

Incorrect Option:

A. Configure the switch to act as an ARP proxy.
This is incorrect. An ARP proxy responds to ARP requests on behalf of other hosts, which is used in specific routing scenarios (e.g., for hosts on the same subnet but separated by a router). It does not solve the problem of DAI dropping packets due to a missing binding table after a reboot. It is unrelated to the operation of DHCP Snooping and DAI.

B. Create static IP-to-MAC bindings for the DHCP and DNS servers.
This is incomplete and insufficient. While creating static bindings for critical servers is a good practice to ensure they are always trusted, it only protects traffic to and from those specific servers. The core disruption after a reboot is caused by the loss of bindings for all the client endpoints. Manually creating static entries for every client is not scalable, making this an impractical solution for minimizing widespread disruption.

D. Configure the IP helper address on this switch, rather than a core routing switch.
This is incorrect. The ip helper-address command is used to relay DHCP broadcast requests from a client VLAN to a DHCP server on a different subnet. The location of this configuration (access layer vs. core) is a design decision and does not impact the persistence of the DHCP snooping binding table across switch reboots. It does not help resolve the DAI disruption problem.

Reference:
HPE Aruba Networking CX Security Configuration Guide

The official documentation details the commands for saving the DHCP snooping database to a file to preserve bindings across reboots.

Link: HPE Aruba Networking CX Security Guide (See content on "DHCP Snooping" and the dhcp-snooping database command)

Summary:
The enforcement rule is triggered when ClearPass Profiler detects a "Conflict," meaning the same MAC address has been seen with two different profiling fingerprints (e.g., as a "Windows" device and later as a "PXE Boot" device). This is common with devices that perform network boot (PXE), as their pre-OS environment and final OS have different network stacks. To prevent these legitimate devices from being incorrectly quarantined, you can configure cluster-wide profiler parameters to ignore conflicts between specific, known device pairs (like PXE and Windows).

Correct Option:

C. Whether the company has devices that use PXE boot
This is the most direct and common scenario requiring conflict ignore rules. A device using PXE boot will initially be profiled as a "PXE" device. Once it loads its full operating system (e.g., Windows), it will be profiled as a "Windows" device, creating a conflict for the same MAC address. Knowing that PXE boot is used in the environment is the key information that determines if you need to configure the cluster-wide parameter to ignore conflicts between PXE and the final OS type.

Incorrect Option:

A. Whether the company has rare Internet of Things (IoT) devices
This is incorrect. While rare IoT devices might be difficult to profile accurately, they typically do not cause the specific "Conflict" scenario defined in the rule. A rare device might be misclassified or unclassified, but it wouldn't frequently flip between two distinct, known profiles for the same MAC address. The conflict rule is for devices that legitimately present two different identities over time.

B. Whether some devices are incapable of captive portal or 802.1X authentication
This is incorrect. A device's capability to authenticate is unrelated to the profiling conflict. Non-authenticating devices are handled by other means, such as a MAB service. Whether a device authenticates or not does not change the fact that Profiler will still attempt to identify it, and a PXE-booting device that doesn't authenticate would still cause a conflict.

D. Whether some devices are running legacy operating systems
This is incorrect. A legacy OS will typically have a consistent, though perhaps outdated, fingerprint. It will be profiled as that single OS type (e.g., "Windows XP") and not switch to a different profile, thus not triggering a conflict. The conflict issue is specifically about a single device exhibiting multiple distinct profiles, which is characteristic of a boot process like PXE, not simply running an old OS.

Reference:
HPE Aruba Networking ClearPass Policy Manager Profiler Guide

The official documentation details how profiling conflicts work and how to configure global settings to ignore common, legitimate conflicts such as those caused by PXE boot sequences.

Link: HPE Aruba Networking ClearPass Documentation Portal (See sections on "Endpoint Profiling" and "Configuring Profiler Cluster-Wide Parameters")

Summary:
The requirement is for Windows domain computers to perform machine and user authentication within a single 802.1X session. This is known as machine and user authentication. Tunneled EAP (TEAP) is specifically designed for this purpose. It establishes a secure outer tunnel using a machine certificate. Inside this tunnel, both machine authentication (e.g., via EAP-TLS) and subsequent user authentication can occur seamlessly without requiring a second EAP handshake, providing a fast and secure connection experience.

Correct Option:

A. TEAP
This is correct because TEAP supports "Inner Method Chaining," which allows multiple authentication types (like machine and user credentials) to be validated within a single EAP session. The machine authenticates first to establish the secure tunnel, and then the user credentials are passed inside that same tunnel. This satisfies the requirement for both authentications in one session and is natively supported by Windows for 802.1X.

Incorrect Option:

B. PEAP MSCHAPv2
This is incorrect. PEAP-MSCHAPv2 is designed primarily for user authentication. While a machine can authenticate using PEAP, it would require two separate EAP sessions: one for the machine and another for the user. This results in a noticeable delay (a "double logon") during the user login process and does not meet the requirement for a single, combined session.

C. EAP-TTLS
This is incorrect. Like PEAP, EAP-TTLS creates a tunnel for inner authentication methods. However, it does not support the standardized inner method chaining that TEAP provides. It is not the standard or most efficient method for achieving combined machine and user authentication in a single session within a Windows domain environment.

D. EAP-TLS
This is incorrect. EAP-TLS is a certificate-based authentication method. It can be used for either machine authentication (using a machine certificate) or user authentication (using a user certificate), but not both simultaneously within a single session. To achieve both, you would need two separate EAP-TLS sessions, which does not meet the single-session requirement.

Reference:
HPE Aruba Networking ClearPass Policy Manager User Guide

The official documentation details the configuration of EAP methods, including TEAP, and explains its use cases, specifically highlighting its capability for inner method chaining to support both machine and user authentication.

Link: HPE Aruba Networking ClearPass Documentation Portal (See sections on "Configuring Authentication Services" and "EAP Protocols")

Summary:
The question focuses on enabling HPE Aruba Networking ClearPass Policy Manager (CPPM) to collect HTTP User-Agent strings for device profiling in a network with HPE Aruba Networking APs and AOS-CX switches. HTTP User-Agent strings are critical for identifying device types and characteristics. The solution must ensure CPPM receives HTTP traffic or related data from client devices across the network.

Correct Option: A. Add the CPPM server's IP address to the IP helper list in all client VLANs on routing switches.
Explanation: Adding the CPPM server's IP address to the IP helper list on routing switches enables the forwarding of DHCP and other broadcast traffic to CPPM. This allows CPPM to capture DHCP options, including User-Agent strings, which are often embedded in DHCP requests. This method is efficient as it leverages existing network infrastructure to relay relevant traffic to CPPM for profiling without requiring complex configurations like mirroring or redirection.

Incorrect Option: B. Schedule periodic subnet scans of all client subnets on CPPM.
Explanation: Periodic subnet scans on CPPM involve active scanning of network subnets to discover devices, but this method does not specifically capture HTTP User-Agent strings. Subnet scans are more suited for identifying active devices via protocols like SNMP or ARP, not for real-time HTTP traffic analysis. This approach is less effective for the specific requirement of collecting HTTP User-Agent strings for profiling.

Incorrect Option: C. Configure mirror sessions on the APs and switches to copy client HTTP traffic to CPPM.
Explanation: Configuring mirror sessions to send HTTP traffic to CPPM is technically complex and resource-intensive. It requires setting up port mirroring on all APs and switches, which may not scale well in large networks and could overwhelm CPPM with excessive traffic. Additionally, this method is not a standard practice for collecting User-Agent strings, as it captures all traffic, not just relevant data.

Incorrect Option: D. On the APs and switches, configure a redirect to ClearPass Guest in the role for devices being profiled.
Explanation: Redirecting traffic to ClearPass Guest is typically used for guest authentication or captive portal scenarios, not for device profiling via HTTP User-Agent strings. This approach forces devices to a guest portal, which is irrelevant to collecting User-Agent data. It does not provide CPPM with the necessary HTTP traffic or DHCP information for accurate device profiling.

Reference:
HPE Aruba Networking Official Documentation: https://www.arubanetworks.com/support-services/

ClearPass Policy Manager Configuration Guide: https://www.arubanetworks.com/techdocs/ClearPass/