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[General] HPE6-A78 Testing Engine, HPE6-A78 Deutsch Prüfungsfragen

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【General】 HPE6-A78 Testing Engine, HPE6-A78 Deutsch Prüfungsfragen

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HP Aruba Certified Network Security Associate Exam HPE6-A78 Prüfungsfragen mit Lösungen (Q14-Q19):14. Frage
You are deploying an Aruba Mobility Controller (MC). What is a best practice for setting up secure management access to the ArubaOS Web UP
  • A. Install a CA-signed certificate to use for the Web UI server certificate.
  • B. Change the default 4343 port tor the web UI to TCP 443.
  • C. Make sure to enable HTTPS for the Web UI and select the self-signed certificate Installed in the factory.
  • D. Avoid using external manager authentication tor the Web UI.
Antwort: A
Begründung:
For securing management access to the ArubaOS Web UI of an Aruba Mobility Controller (MC), it is a best practice to install a certificate signed by a Certificate Authority (CA). This ensures that communications between administrators and the MC are secured with trusted encryption, which greatly reduces the risk of man-in-the-middle attacks. Using a CA-signed certificate enhances the trustworthiness of the connection over self-signed certificates, which do not offer the same level of assurance.
:
ArubaOS documentation on management access security.

15. Frage
Your company policies require you to encrypt logs between network infrastructure devices and Syslog servers. What should you do to meet these requirements on an ArubaOS-CX switch?
  • A. Set up RadSec and then enable Syslog as a protocol carried by the RadSec tunnel.
  • B. Specify the Syslog server with the UDP option and then add an CPsec tunnel that selects Syslog.
  • C. Specify the Syslog server with the TLS option and make sure the switch has a valid certificate.
  • D. Specify a priv key with the Syslog settings that matches a priv key on the Syslog server.
Antwort: C
Begründung:
To ensure secure transmission of log data over the network, particularly when dealing with sensitive or critical information, using TLS (Transport Layer Security) for encrypted communication between network devices and syslog servers is necessary:
Secure Logging Setup: When configuring an ArubaOS-CX switch to send logs securely to a Syslog server, specifying the server with the TLS option ensures that all transmitted log data is encrypted.
Additionally, the switch must have a valid certificate to establish a trusted connection, preventing potential eavesdropping or tampering with the logs in transit.
Other Options:
Option B, Option C, and Option D are less accurate or applicable for directly encrypting log data between the device and Syslog server as specified in the company policies.

16. Frage
How can hackers implement a man-in-the-middle (MITM) attack against a wireless client?
  • A. The hacker connects a device to the same wireless network as the client and responds to the client's ARP requests with the hacker device's MAC address.
  • B. The hacker uses spear-phishing to probe for the IP addresses that the client is attempting to reach. The hacker device then spoofs those IP addresses.
  • C. The hacker uses a combination of software and hardware to jam the RF band and prevent the client from connecting to any wireless networks.
  • D. The hacker runs an NMap scan on the wireless client to find its MAC and IP address. The hacker then connects to another network and spoofs those addresses.
Antwort: A
Begründung:
A man-in-the-middle (MITM) attack involves an attacker positioning themselves between a wireless client and the legitimate network to intercept or manipulate traffic. HPE Aruba Networking documentation often discusses MITM attacks in the context of wireless security threats and mitigation strategies.
Option D, "The hacker connects a device to the same wireless network as the client and responds to the client's ARP requests with the hacker device's MAC address," is correct. This describes an ARP poisoning (or ARP spoofing) attack, a common MITM technique in wireless networks. The hacker joins the same wireless network as the client (e.g., by authenticating with the same SSID and credentials). Once on the network, the hacker sends fake ARP responses to the client, associating the hacker's MAC address with the IP address of the default gateway (or another target device). This causes the client to send traffic to the hacker's device instead of the legitimate gateway, allowing the hacker to intercept, modify, or forward the traffic, thus performing an MITM attack.
Option A, "The hacker uses a combination of software and hardware to jam the RF band and prevent the client from connecting to any wireless networks," is incorrect. Jamming the RF band would disrupt all wireless communication, including the hacker's ability to intercept traffic. This is a denial-of-service (DoS) attack, not an MITM attack.
Option B, "The hacker runs an NMap scan on the wireless client to find its MAC and IP address. The hacker then connects to another network and spoofs those addresses," is incorrect. NMap scans are used for network discovery and port scanning, not for implementing an MITM attack. Spoofing MAC and IP addresses on another network does not position the hacker to intercept the client's traffic on the original network.
Option C, "The hacker uses spear-phishing to probe for the IP addresses that the client is attempting to reach. The hacker device then spoofs those IP addresses," is incorrect. Spear-phishing is a delivery method for malware or credentials theft, not a direct method for implementing an MITM attack. Spoofing IP addresses alone does not allow the hacker to intercept traffic unless they are on the same network and can manipulate routing (e.g., via ARP poisoning).
The HPE Aruba Networking AOS-8 8.11 User Guide states:
"A common man-in-the-middle (MITM) attack against wireless clients involves ARP poisoning. The hacker connects a device to the same wireless network as the client and sends fake ARP responses to the client, associating the hacker's MAC address with the IP address of the default gateway. This causes the client to send traffic to the hacker's device, allowing the hacker to intercept and manipulate the traffic." (Page 422, Wireless Threats Section) Additionally, the HPE Aruba Networking Security Guide notes:
"ARP poisoning is a prevalent MITM attack in wireless networks. The attacker joins the same network as the client and responds to the client's ARP requests with the attacker's MAC address, redirecting traffic through the attacker's device. This allows the attacker to intercept sensitive data or modify traffic between the client and the legitimate destination." (Page 72, Wireless MITM Attacks Section)
:
HPE Aruba Networking AOS-8 8.11 User Guide, Wireless Threats Section, Page 422.
HPE Aruba Networking Security Guide, Wireless MITM Attacks Section, Page 72.

17. Frage
What purpose does an initialization vector (IV) serve for encryption?
  • A. It makes encryption algorithms more secure by ensuring that same plaintext and key can produce different ciphertext.
  • B. It enables programs to convert easily-remembered passphrases to keys of a correct length.
  • C. It helps parties to negotiate the keys and algorithms used to secure data before data transmission.
  • D. It enables the conversion of asymmetric keys into keys that are suitable for symmetric encryption.
Antwort: A
Begründung:
The primary purpose of an Initialization Vector (IV) in encryption is to ensure that the same plaintext encrypted with the same encryption key will produce different ciphertext each time it is encrypted. This variability is crucial for securing repetitive data patterns and preventing certain types of cryptographic attacks, such as replay or pattern analysis attacks. The IV adds randomness to the encryption process, making it more secure by ensuring that encrypted messages are unique, even if the plaintext and key remain unchanged. This prevents attackers from deducing patterns or inferring any useful information from repeated ciphertext.

18. Frage
You have a network with AOS-CX switches for which HPE Aruba Networking ClearPass Policy Manager (CPPM) acts as the TACACS+ server. When an admin authenticates, CPPM sends a response with:
Aruba-Priv-Admin-User = 1
TACACS+ privilege level = 15
What happens to the user?
  • A. The user receives administrators access.
  • B. The user receives no access.
  • C. The user receives operators access.
  • D. The user receives auditors access.
Antwort: A
Begründung:
HPE Aruba Networking AOS-CX switches support TACACS+ for administrative authentication, where ClearPass Policy Manager (CPPM) can act as the TACACS+ server. When an admin authenticates, CPPM sends a TACACS+ response that includes attributes such as the TACACS+ privilege level and vendor-specific attributes (VSAs) like Aruba-Priv-Admin-User.
In this scenario, CPPM sends:
TACACS+ privilege level = 15: In TACACS+, privilege level 15 is the highest level and typically grants full administrative access (equivalent to a superuser or administrator role).
Aruba-Priv-Admin-User = 1: This Aruba-specific VSA indicates that the user should be granted the highest level of administrative access on the switch.
On AOS-CX switches, the privilege level 15 maps to the administrator role, which provides full read-write access to all switch functions. The Aruba-Priv-Admin-User = 1 attribute reinforces this by explicitly assigning the admin role, ensuring the user has unrestricted access.
Option A, "The user receives auditors access," is incorrect because auditors typically have read-only access, which corresponds to a lower privilege level (e.g., 1 or 3) on AOS-CX switches.
Option B, "The user receives no access," is incorrect because the authentication was successful, and CPPM sent a response granting access with privilege level 15.
Option D, "The user receives operators access," is incorrect because operators typically have a lower privilege level (e.g., 5 or 7), which provides limited access compared to an administrator.
The HPE Aruba Networking AOS-CX 10.12 Security Guide states:
"When using TACACS+ for administrative authentication, the switch interprets the privilege level returned by the TACACS+ server. A privilege level of 15 maps to the administrator role, granting full read-write access to all switch functions. The Aruba-Priv-Admin-User VSA, when set to 1, explicitly assigns the admin role, ensuring the user has unrestricted access." (Page 189, TACACS+ Authentication Section) Additionally, the HPE Aruba Networking ClearPass Policy Manager 6.11 User Guide notes:
"ClearPass can send the Aruba-Priv-Admin-User VSA in a TACACS+ response to specify the administrative role on Aruba devices. A value of 1 indicates the admin role, which provides full administrative privileges." (Page 312, TACACS+ Enforcement Section)
:
HPE Aruba Networking AOS-CX 10.12 Security Guide, TACACS+ Authentication Section, Page 189.
HPE Aruba Networking ClearPass Policy Manager 6.11 User Guide, TACACS+ Enforcement Section, Page 312.

19. Frage
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