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Successful completion of the HPE6-A84 certification exam is a prerequisite for obtaining the Aruba Certified Network Security Expert certification. Aruba Certified Network Security Expert Written Exam certification is highly respected in the IT industry and can open up job opportunities for IT professionals looking to advance their careers in the field of network security.
HP HPE6-A84 (Aruba Certified Network Security Expert Written) Certification Exam is a highly sought-after certification for individuals looking to advance their careers in the field of network security. Aruba Certified Network Security Expert Written Exam certification is specifically designed to validate the skills and knowledge required to design, implement, and manage secure networks using Aruba’s network security solutions. HPE6-A84 exam is intended for experienced network security professionals who have a thorough understanding of advanced security technologies and best practices.
HP HPE6-A84 exam is a two-hour, multiple-choice exam that consists of 60 questions. HPE6-A84 exam is available in English and Japanese and can be taken online or at an authorized testing center. The passing score for the exam is 75%, and candidates have up to three attempts to pass the exam.
NEW QUESTION # 20
Which element helps to lay the foundation for solid network security forensics?
- A. Enable BPDU protection and loop protection on edqe switch ports
- B. Implementing 802.1X authentication on switch ports that connect to APs
- C. Enabling debug-level information for network infrastructure device logs
- D. Ensuring that all network devices use a correct, consistent clock
Answer: D
Explanation:
Explanation
This is because network forensics relies on the analysis of network traffic data, which is often time-stamped by the devices that generate or transmit it. Having a synchronized and accurate clock across all network devices helps to establish a reliable timeline of events and correlate different sources of evidence12
A: Enable BPDU protection and loop protection on edge switch ports is not related to network security forensics, but rather to preventing network loops and topology changes caused by rogue switches or bridges3
B: Enabling debug-level information for network infrastructure device logs might provide more details about the network activity, but it also consumes more resources and storage, and might not be relevant or useful for forensic analysis. Moreover, debug-level information might not be available for long-term retention or legal purposes4
C: Implementing 802.1X authentication on switch ports that connect to APs is a good security practice to prevent unauthorized access to the network, but it does not directly help with network security forensics. 802.1X authentication does not capture or record network traffic data, which is the main source of evidence for network forensics
NEW QUESTION # 21
You are reviewing an endpoint entry in ClearPass Policy Manager (CPPM) Endpoints Repository.
What is a good sign that someone has been trying to gain unauthorized access to the network?
- A. The entry shows a profile conflict of having a new profile of Computer for a profiled Printer.
- B. The entry shows multiple DHCP options under the fingerprints.
- C. The entry shows an Unknown status.
- D. The entry lacks a hostname or includes a hostname with long seemingly random characters.
Answer: A
NEW QUESTION # 22
You are working with a developer to design a custom NAE script for a customer. You are helping the developer find the correct REST API resource to monitor.
Refer to the exhibit below.
What should you do before proceeding?
- A. Enable the switch to listen to REST API calls on the default VRF.
- B. Make sure that your browser is set up to store authentication tokens and cookies.
- C. Go to the v1 API documentation interface instead of the v10.10 interface.
- D. Use your Aruba passport account and collect a token to use when trying out API calls.
Answer: D
Explanation:
Explanation
The exhibit shows the ArubaOS-CX REST API documentation interface, which allows you to explore the available resources and try out the API calls using the "Try it out" button. However, before you can use this feature, you need to authenticate yourself with your Aruba passport account and collect a token that will be used for subsequent requests. This token will expire after a certain time, so you need to refresh it periodically. You can find more details about how to use the documentation interface and collect a token in the ArubaOS-CX REST API Guide1.
NEW QUESTION # 23
Refer to the exhibit.
A customer requires protection against ARP poisoning in VLAN 4. Below are listed all settings for VLAN 4 and the VLAN 4 associated physical interfaces on the AOS-CX access layer switch:
What is one issue with this configuration?
- A. ARP proxy is not enabled on VLAN 4.
- B. Edge ports are not configured as untrusted for ARP inspection.
- C. LAG 1 is configured as trusted for ARP inspection but should be untrusted.
- D. DHCP snooping is not enabled on VLAN 4.
Answer: B
Explanation:
Explanation
This is because ARP inspection is a security feature that validates ARP packets in a network and prevents ARP poisoning attacks12 ARP inspection works by intercepting, logging, and discarding ARP packets with invalid IP-to-MAC address bindings1 To enable ARP inspection, the switch needs to know which ports are trusted and which are untrusted. Trusted ports are those that connect to authorized DHCP servers or other network devices that are not vulnerable to ARP spoofing. Untrusted ports are those that connect to end hosts or devices that might send forged ARP packets13 In the exhibit, LAG 1 is configured as a trusted port for ARP inspection, which is correct because it connects to the core switch. However, the edge ports (1/1/1-1/1/24) are not configured as untrusted ports for ARP inspection, which is incorrect because they connect to end hosts that might be compromised by an attacker. By default, all ports are untrusted for ARP inspection, but this can be changed by using the command ip arp inspection trust on the interface configuration mode3 Therefore, to protect VLAN 4 against ARP poisoning, the edge ports should be configured as untrusted for ARP inspection by using the command no ip arp inspection trust on the interface configuration mode. This way, the switch will validate the ARP packets received on these ports against the DHCP snooping database or an ARP access-list and drop any invalid packets34
A: ARP proxy is not enabled on VLAN 4. This is not an issue because ARP proxy is an optional feature that allows the switch to respond to ARP requests on behalf of hosts in different subnets5 It is not related to ARP poisoning or ARP inspection.
B: LAG 1 is configured as trusted for ARP inspection but should be untrusted. This is not an issue because LAG 1 connects to the core switch, which is a trusted device that does not send forged ARP packets.
C: DHCP snooping is not enabled on VLAN 4. This is not an issue because DHCP snooping is a separate feature that prevents rogue DHCP servers from offering IP addresses to clients6 It is not directly related to ARP poisoning or ARP inspection, although it can provide information for ARP inspection validation if enabled
NEW QUESTION # 24
When would you implement BPDU protection on an AOS-CX switch port versus BPDU filtering?
- A. Use BPDU protection on edge ports to permanently lock out rogue devices; use BPDU filtering on edge ports to temporarily lock out rogue devices.
- B. Use BPDU protection on edge ports to prevent rogue devices from connecting; use BPDU filtering on inter-switch ports for specialized use cases.
- C. Use BPDU protection on edge ports to protect against rogue devices when the switch implements MSTP; use BPDU filtering to protect against rogue devices when the switch implements PVSTP+.
- D. Use BPDU protection on inter-switch ports to ensure that they are selected as root; use BPDU filtering on edge ports to prevent rogue devices from connecting.
Answer: B
Explanation:
Explanation
BPDU (Bridge Protocol Data Unit) is a message that is exchanged between switches to maintain the spanning tree topology and prevent loops. BPDU protection and BPDU filtering are two features that can be configured on AOS-CX switch ports to enhance security and performance.
BPDU protection is a feature that disables a port if it receives a BPDU, indicating that an unauthorized switch or device has been connected to the port. BPDU protection is typically used on edge ports, which are ports that connect to end devices such as PCs or printers, and are not expected to receive BPDUs. BPDU protection prevents rogue devices from connecting to the network and affecting the spanning tree topology.
BPDU filtering is a feature that prevents a port from sending or receiving BPDUs, effectively isolating the port from the spanning tree topology. BPDU filtering is typically used on inter-switch ports, which are ports that connect to other switches, for specialized use cases such as creating a separate spanning tree domain or reducing the overhead of BPDUs. BPDU filtering should be used with caution, as it can create loops or inconsistencies in the network.
You can find more information about how to configure BPDU protection and BPDU filtering on AOS-CX switch ports in the [Configuring Spanning Tree Protocol - Aruba] page and the [AOS-CX Switching Configuration Guide] page. The other options are not correct because they either use BPDU protection or BPDU filtering on the wrong type of ports or for the wrong purpose. For example, using BPDU protection on inter-switch ports would disable the ports if they receive BPDUs, which are expected in normal operation.
Using BPDU filtering on edge ports would allow rogue devices to connect to the network and create loops or affect the spanning tree topology.
NEW QUESTION # 25
You are setting up Aruba ClearPass Policy Manager (CPPM) to enforce EAP-TLS authentication with Active Directory as the authentication source. The company wants to prevent users with disabled accounts from connecting even if those users still have valid certificates.
As the first part of meeting these criteria, what should you do to enable CPPM to determine where accounts are enabled in AD or not?
- A. Enable OCSP in the EAP-TLS authentication method settings and configure an OCSP override to the domain controller FQDN.
- B. Add an Endpoint Context Server to the domain controller with actions for querying the domain controller for account status.
- C. Add a custom attribute for userAccountControl to the filters in the AD authentication source.
- D. Install a Microsoft Active Directory extension in Aruba ClearPass Guest and set up an HTTP authentication source that points to that extension.
Answer: C
NEW QUESTION # 26
A customer's admins have added RF Protect licenses and enabled WIDS for a customer's AOS 8-based solution. The customer wants to use the built-in capabilities of APs without deploying dedicated air monitors (AMs). Admins tested rogue AP detection by connecting an unauthorized wireless AP to a switch. The rogue AP was not detected even after several hours.
What is one point about which you should ask?
- A. Whether admins set at least one radio on each AP to air monitor mode
- B. Whether APs' switch ports support all the VLANs that are accessible at the edge
- C. Whether admins enabled wireless containment
- D. Whether the customer is using non-standard Wi-Fi channels in the deployment
Answer: A
Explanation:
Explanation
RF Protect is a feature that enables wireless intrusion detection and prevention system (WIDS/WIPS) capabilities on AOS 8-based solutions. WIDS/WIPS allows detecting and mitigating rogue APs, unauthorized clients, and other wireless threats. RF Protect requires RF Protect licenses to be installed and WIDS to be enabled on the Mobility Master (MM).
To use the built-in capabilities of APs for WIDS/WIPS, without deploying dedicated air monitors (AMs), admins need to set at least one radio on each AP to air monitor mode. Air monitor mode allows the AP to scan the wireless spectrum and report any wireless activity or anomalies to the MM. Air monitor mode does not affect the other radio on the AP, which can still serve clients in access mode. By setting at least one radio on each AP to air monitor mode, admins can achieve full coverage and visibility of the wireless environment and detect rogue APs.
If admins do not set any radio on the APs to air monitor mode, the APs will not scan the wireless spectrum or report any wireless activity or anomalies to the MM. This means that the APs will not be able to detect rogue APs, even if they are connected to the same network. Therefore, admins should check whether they have set at least one radio on each AP to air monitor mode.
NEW QUESTION # 27
A company has Aruba gateways that are Implementing gateway IDS/IPS in IDS mode. The customer complains that admins are receiving too frequent of repeat email notifications for the same threat. The threat itself might be one that the admins should investigate, but the customer does not want the email notification to repeat as often.
Which setting should you adjust in Aruba Central?
- A. Report scheduling settings
- B. The IDS policy setting (strict, medium, or lenient)
- C. The allowlist settings in the IDS policy
- D. Alert duration and threshold settings
Answer: D
Explanation:
Explanation
Alert duration and threshold settings are used to control how often and under what conditions email notifications are sent for gateway IDS/IPS events 1. By adjusting these settings, the customer can reduce the frequency of repeat email notifications for the same threat, while still being informed of any critical or new threats.
To adjust the alert duration and threshold settings in Aruba Central, the customer can follow these steps 1:
In the Aruba Central app, set the filter to Global, a group, or a device.
Under Analyze, click Alerts & Events.
Click the Config icon to open the Alert Severities & Notifications page.
Select the Gateway IDS/IPS tab to view the alert categories and severities for gateway IDS/IPS events.
Click on an alert category to expand it and view the alert duration and threshold settings for each severity level.
Enter a value in minutes for the alert duration. This is the time period during which the alert is active and email notifications are sent.
Enter a value for the alert threshold. This is the number of times the alert must be triggered within the alert duration before an email notification is sent.
Click Save.
By increasing the alert duration and/or threshold values, the customer can reduce the number of email notifications for recurring threats, as they will only be sent when the threshold is reached within the duration.
For example, if the customer sets the alert duration to 60 minutes and the alert threshold to 10 for a Critical severity level, then an email notification will only be sent if the same threat occurs 10 times or more within an hour.
NEW QUESTION # 28
Refer to the scenario.
A customer requires these rights for clients in the "medical-mobile" AOS firewall role on Aruba Mobility Controllers (MCs):
Permitted to receive IP addresses with DHCP
Permitted access to DNS services from 10.8.9.7 and no other server
Permitted access to all subnets in the 10.1.0.0/16 range except denied access to 10.1.12.0/22 Denied access to other 10.0.0.0/8 subnets Permitted access to the Internet Denied access to the WLAN for a period of time if they send any SSH traffic Denied access to the WLAN for a period of time if they send any Telnet traffic Denied access to all high-risk websites External devices should not be permitted to initiate sessions with "medical-mobile" clients, only send return traffic.
The exhibits below show the configuration for the role.
What setting not shown in the exhibit must you check to ensure that the requirements of the scenario are met?
- A. That AppRF and WebCC are enabled globally and on the medical-mobile role
- B. That stateful handling of traffic is enabled globally on the MCs' firewalls and on the medical-mobile role.
- C. That denylisting is enabled globally on the MCs' firewalls
- D. That the MCs are assigned RF Protect licenses
Answer: A
NEW QUESTION # 29
You are working with a developer to design a custom NAE script for a customer. The NAE agent should trigger an alert when ARP inspection drops packets on a VLAN. The customer wants the admins to be able to select the correct VLAN ID for the agent to monitor when they create the agent.
What should you tell the developer to do?
- A. Create multiple monitors within the script from which admins can select when they create the agent.
- B. Use this variable, %{vlan-id} when defining the monitor URI in the NAE agent script.
- C. Use a callback action to collect the ID of the VLAN on which admins have enabled NAE monitoring.
- D. Define a VLAN ID parameter; reference that parameter when defining the monitor URI.
Answer: D
Explanation:
Explanation
A custom NAE script is a Python script that defines the monitors, the alert-trigger logic, and the remedial actions for an NAE agent. A monitor is a URI that specifies the data source and the data type that the NAE agent should collect and analyze. For example, to monitor the ARP inspection statistics on a VLAN, the monitor URI would be something like this:
where <vlan-id> is the ID of the VLAN to be monitored.
To allow the admins to select the correct VLAN ID for the agent to monitor when they create the agent, you need to define a VLAN ID parameter in the NAE script. A parameter is a variable that can be set by the user when creating or modifying an agent. A parameter can be referenced in other parts of the script by using the syntax ${parameter-name}. For example, to define a VLAN ID parameter and reference it in the monitor URI, you would write something like this:
This way, when the admins create or modify the agent, they can enter the VLAN ID that they want to monitor, and the NAE script will use that value in the monitor URI.
You can find more information about how to write custom NAE scripts and use parameters in the NAE Scripting Guide
NEW QUESTION # 30
A customer wants CPPM to authenticate non-802.1X-capable devices. An admin has created the service shown in the exhibits below:
What is one recommendation to improve security?
- A. Creating and using a custom MAC-Auth authentication method
- B. Enabling caching of posture and roles
- C. Using Active Directory as the authentication source
- D. Adding an enforcement policy rule that denies access to endpoints with the Conflict flaq
Answer: A
Explanation:
Explanation
MAC Authentication Bypass (MAB) is a technique that allows non-802.1X-capable devices to bypass the
802.1X authentication process and gain network access based on their MAC addresses. However, MAB has some security drawbacks, such as the possibility of MAC address spoofing or unauthorized devices being added to the network. Therefore, it is recommended to use a custom MAC-Auth authentication method that adds an additional layer of security to MAB.
A custom MAC-Auth authentication method is a method that uses a combination of the MAC address and another attribute, such as a username, password, or certificate, to authenticate the device. This way, the device needs to provide both the MAC address and the additional attribute to gain access, making it harder for an attacker to spoof or impersonate the device. A custom MAC-Auth authentication method can be created and configured in ClearPass Policy Manager (CPPM) by following the steps in the Customizing MAC Authentication - Aruba page.
NEW QUESTION # 31
Refer to the scenario.
This customer is enforcing 802.1X on AOS-CX switches to Aruba ClearPass Policy Manager (CPPM). The customer wants switches to download role settings from CPPM. The "reception-domain" role must have these settings:
- Assigns clients to VLAN 14 on switch 1, VLAN 24 on switch 2, and so on.
- Filters client traffic as follows:
- Clients are permitted full access to 10.1.5.0/24 and the Internet
- Clients are denied access to 10.1.0.0/16
The switch topology is shown here:
How should you configure the VLAN setting for the reception role?
- A. Assign a number-based ID to the access layer switches. Then use this variable in the enforcement profile VLAN settings: %(NAS-ID]4.
- B. Assign a consistent name to VLAN 14, 24, or 34 on each access layer switch and reference that name in the enforcement profile VLAN settings.
- C. Configure the enforcement profile as a downloadable role, but specify only the role name and leave the VLAN undefined. Then define a 'reception' role with the correct VLAN setting on each individual access layer switch.
- D. Create a separate enforcement profile with a different VLAN ID for each switch. Add all profiles to the profile list in the appropriate enforcement policy rule.
Answer: B
NEW QUESTION # 32
Refer to the exhibit.
Which IP address should you record as a possibly compromised client?
- A. 10.254.1.21
- B. 10.1.26.151
- C. 10.1.26.1
- D. 10.1J.100
Answer: B
NEW QUESTION # 33
A customer's admins have added RF Protect licenses and enabled WIDS for a customer's AOS 8-based solution. The customer wants to use the built-in capabilities of APs without deploying dedicated air monitors (AMs). Admins tested rogue AP detection by connecting an unauthorized wireless AP to a switch. The rogue AP was not detected even after several hours.
What is one point about which you should ask?
- A. Whether admins set at least one radio on each AP to air monitor mode
- B. Whether APs' switch ports support all the VLANs that are accessible at the edge
- C. Whether admins enabled wireless containment
- D. Whether the customer is using non-standard Wi-Fi channels in the deployment
Answer: A
NEW QUESTION # 34
You want to use Device Insight tags as conditions within CPPM role mapping or enforcement policy rules.
What guidelines should you follow?
- A. Use the Endpoint type for the rule conditions; no extra authorization source is required for services that use policies with these rules.
- B. Use the Endpoints Repository type for the rule conditions; Add Endpoints Repository as a secondary authentication source for services that use policies with these rules.
- C. Use the Application type for the rule conditions; no extra authorization source is required for services that use policies with these rules.
- D. Create an HTTP authentication source to the Central API that queries for the tags. To use that source as the type for rule conditions, add it an authorization source for the service in question.
Answer: A
Explanation:
Explanation
According to the Aruba Cloud Authentication and Policy Overview1, Device Insight tags are stored in the Endpoint Repository and can be used as conditions within CPPM role mapping or enforcement policy rules.
The rule condition type should be Endpoint, and the attribute should be Device Insight Tags. No extra authorization source is required for services that use policies with these rules. Therefore, option D is the correct answer.
Option A is incorrect because creating an HTTP authentication source to the Central API is not necessary to use Device Insight tags as conditions. Device Insight tags are already synchronized between Central and CPPM, and can be accessed from the Endpoint Repository.
Option B is incorrect because using the Application type for the rule conditions is not applicable to Device Insight tags. The Application type is used to match attributes from the Application Authentication source, which is used to integrate with third-party applications such as Microsoft Intune or Google G Suite.
Option C is incorrect because using the Endpoints Repository type for the rule conditions is not valid for Device Insight tags. The Endpoints Repository type is used to match attributes from the Endpoints Repository source, which is different from the Endpoint type. The Endpoints Repository source contains information about endpoints that are manually added or imported into CPPM, while the Endpoint type contains information about endpoints that are dynamically discovered and profiled by CPPM or Device Insight. Adding Endpoints Repository as a secondary authentication source for services that use policies with these rules is also unnecessary and redundant.
NEW QUESTION # 35
The customer needs a way for users to enroll new wired clients in Intune. The clients should have limited access that only lets them enroll and receive certificates. You plan to set up these rights in an AOS-CX role named "provision." The customer's security team dictates that you must limit these clients' Internet access to only the necessary sites. Your switch software supports IPv4 and IPv6 addresses for the rules applied in the "provision" role.
What should you recommend?
- A. Configuring the "provision" role as a downloadable user role (DUR) in CPPM
- B. Assigning the "provision" role to a VLAN and then setting up the rules within a Layer 2 access control list (ACL)
- C. Configuring the rules for the "provision" role with IPv6 addresses, which tend to be more stable
- D. Enabling tunneling to the MCs on the "provision" role and then setting up the privileges on the MCs
Answer: A
Explanation:
Explanation
This is because a downloadable user role (DUR) is a feature that allows the switch to use a central ClearPass server to download user-roles to the switch for authenticated users12 A DUR can contain various attributes and rules that define the access level and privileges of the user, such as VLAN, ACL, PoE, reauthentication period, etc3 A DUR can also be customized and updated on the ClearPass server without requiring any changes on the switch1 A DUR can be used to create a "provision" role that allows users to enroll new wired clients in Intune. The
"provision" role can have limited access that only lets them enroll and receive certificates from the Intune service. The "provision" role can also have rules that restrict the Internet access of the users to only the necessary sites, such as the Intune portal and the certificate authority. The rules can be based on IPv4 or IPv6 addresses, depending on the network configuration and preference2
A: Configuring the rules for the "provision" role with IPv6 addresses, which tend to be more stable. This is not a valid recommendation because it does not address how to create and apply the "provision" role on the switch. Moreover, IPv6 addresses do not necessarily tend to be more stable than IPv4 addresses, as both protocols have their own advantages and disadvantages4
B: Enabling tunneling to the MCs on the "provision" role and then setting up the privileges on the MCs. This is not a valid recommendation because it does not explain how to enable tunneling or what MCs are. Moreover, tunneling is a technique that encapsulates one network protocol within another, which adds complexity and overhead to the network communication5
D: Assigning the "provision" role to a VLAN and then setting up the rules within a Layer 2 access control list (ACL). This is not a valid recommendation because it does not explain how to assign a role to a VLAN or how to create a Layer 2 ACL on the switch. Moreover, a Layer 2 ACL is limited in its filtering capabilities, as it can only match on MAC addresses or Ethernet types, which might not be sufficient for restricting Internet access to specific sites
NEW QUESTION # 36
How does Aruba Central handle security for site-to-site connections between AOS 10 gateways?
- A. It automatically steers traffic away from Internet-based connections to more secure MPLS connections to reduce encryption overhead.
- B. It uses an Aruba proprietary integrity and encryption technologies to secure site-to-site connections, making them resistant to zero day attacks.
- C. It automatically establishes IPsec tunnels for all site-to-site (all HUBs and Branches) connections using keys securely distributed by Central.
- D. It automatically establishes simple-to-manage and highly secure TLSv1.3 tunnels between gateways.
Answer: C
NEW QUESTION # 37
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