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問題 #121
You need to create a certificate signing request (CSR) for HPE Aruba Networking ClearPass's RADIUS/EAP certificate.
What is one guideline you should follow?
答案:C
解題說明:
For a ClearPass RADIUS/EAP server certificate, the certificate identity should clearly represent the ClearPass server or service name that supplicants validate during 802.1X authentication. A fully qualified domain name in the subject common name, without a wildcard, is the safest guideline because it provides a specific and predictable server identity. Wildcard identities are not preferred for EAP server identity validation because they weaken specificity and can create trust ambiguity. A private CA is acceptable in enterprise 802.1X if clients trust its root certificate. RSA versus EC is a compatibility and policy decision, not simply a way to obtain shorter keys. A SAN may include DNS names, but requiring an IP address is not the best general guideline.
問題 #122
HPE Aruba Networking Central displays an alert about an Infrastructure Attack that was detected.
You go to the Security > RAPIDS events and see that the attack was "Detect adhoc using Valid SSID." What is one possible next step?
答案:A
解題說明:
* RAPIDS Ad-Hoc Detection:
* The alert "Detect ad-hoc using Valid SSID" indicates that a device is broadcasting an SSID that matches a valid network SSID in ad-hoc mode. This can be an indication of an infrastructure attack or misconfiguration.
* Next Steps:
* Use Aruba Central floorplans or AP location data to identify the physical area where the offending device is detected.
* Locate and investigate the device to determine if it is malicious or simply misconfigured.
* Option Analysis:
* Option A: Incorrect. While tuning thresholds is useful for reducing false positives, this step does not directly address a potential threat.
* Option B: Incorrect. Faulty drivers can cause similar behavior, but this step is not immediately actionable without locating the device first.
* Option C: Correct. Floorplans or AP identities help locate the threat's physical area for further investigation.
* Option D: Incorrect. RAPIDS focuses on detecting devices via SSID and MAC, not IP addresses, making this approach less relevant.
問題 #123
A company has HPE Aruba Networking infrastructure devices. The devices authenticate clients to HPE Aruba Networking ClearPass Policy Manager (CPPM). You want CPPM to track information about clients, such as their IP addresses and their network bandwidth utilization. What should you set up on the network infrastructure devices to help that happen?
答案:D
解題說明:
* RADIUS Accounting:
* RADIUS accounting enables network devices to report client session details (e.g., IP addresses, session duration, bandwidth usage) to CPPM.
* Interim updates ensure CPPM receives ongoing updates about the client's session, enabling accurate tracking.
* Option Analysis:
* Option A: Incorrect. Syslog logging sends general system logs, not client session details.
* Option B: Incorrect. Dynamic authorization (CoA) handles session changes but does not provide usage tracking.
* Option C: Correct. RADIUS accounting with interim updates tracks client IP addresses and bandwidth utilization.
* Option D: Incorrect. IF-MAP interfaces are used for metadata sharing, not for RADIUS-based tracking.
問題 #124 
You have downloaded a packet capture that you generated on HPE Aruba Networking Central. When you open the capture in Wireshark, you see the output shown in the exhibit.
What should you do in Wireshark so that you can better interpret the packets?
答案:B
解題說明:
To better interpret the packets shown in the Wireshark capture, you should choose to decode UDP port 5555 packets as ARUBA_ERM and set the Aruba ERM Type to 0. This configuration will allow Wireshark to properly decode and display the Aruba-specific encapsulated remote mirroring (ERM) packets, providing a clearer understanding of the traffic.
1.Decoding Protocols: Selecting the correct protocol decoding in Wireshark ensures that the captured packets are interpreted correctly, displaying the relevant information.
2.Aruba ERM: The packets in the capture are likely encapsulated remote mirroring (ERM) packets specific to Aruba, which require proper decoding settings in Wireshark.
3.Clear Interpretation: By setting the Aruba ERM Type to 0 and decoding the packets as ARUBA_ERM, you can view the encapsulated data accurately.
問題 #125 
All of the switches in the exhibit are AOS-CX switches.
What is the preferred configuration on Switch-2 for preventing rogue OSPF routers in this network?
答案:B
解題說明:
To prevent rogue OSPF routers in the network shown in the exhibit, the preferred configuration on Switch-2 is to configure OSPF authentication on Lag 1 in MD5 mode. This setup enhances security by ensuring that only routers with the correct MD5 authentication credentials can participate in the OSPF routing process. This method protects the OSPF sessions against unauthorized devices that might attempt to introduce rogue routing information into the network.
1.OSPF Authentication: Implementing MD5 authentication on Lag 1 ensures that OSPF updates are secured with a cryptographic hash. This prevents unauthorized OSPF routers from establishing peering sessions and injecting potentially malicious routing information.
2.Secure Communication: MD5 authentication provides a higher level of security compared to simple password authentication, as it uses a more robust hashing algorithm.
3.Applicability: Lag 1 is the primary link between Switch-1 and Switch-2, and securing this link helps protect the integrity of the OSPF routing domain.
Reference: Aruba's AOS-CX switch documentation and OSPF configuration guides detail how to set up MD5 authentication for OSPF to enhance network security against rogue devices.
問題 #126
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