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HP Aruba Certified Network Security Associate Exam Sample Questions (Q21-Q26):

NEW QUESTION # 21
What are some functions of an AruDaOS user role?

A. The role determines which wireless networks (SSiDs) a user is permitted to access
B. The role determines which control plane ACL rules apply to the client's traffic
C. The role determines which authentication methods the user must pass to gain network access
D. The role determines which firewall policies and bandwidth contract apply to the clients traffic

Answer: C

NEW QUESTION # 22
You have deployed a new Aruba Mobility Controller (MC) and campus APs (CAPs). One of the WLANs enforces 802.IX authentication lo Aruba ClearPass Policy Manager {CPPM) When you test connecting the client to the WLAN. the test falls You check Aruba ClearPass Access Tracker and cannot find a record of the authentication attempt You ping from the MC to CPPM. and the ping is successful.
What is a good next step for troubleshooting?

A. Renew CPPM's RADIUS/EAP certificate
B. Reset the user credentials
C. Check connectivity between CPPM and a backend directory server
D. Check CPPM Event viewer.

Answer: D

Explanation:
When dealing with a failed 802.1X authentication attempt to a WLAN enforced by Aruba ClearPass Policy Manager (CPPM) where no record of the attempt is seen in ClearPass Access Tracker, a good next troubleshooting step is to check the CPPM Event Viewer. Since you are able to successfully ping from the Mobility Controller to CPPM, this indicates that there is network connectivity between these two devices. The lack of a record in Access Tracker suggests that the issue may not be with the RADIUS/EAP certificate or user credentials, but possibly with the ClearPass service itself or its reception of authentication requests. The Event Viewer can provide detailed logs that might reveal internal errors or misconfigurations within CPPM that could prevent it from processing authentication attempts properly.

NEW QUESTION # 23
You have configured a WLAN to use Enterprise security with the WPA3 version.
How does the WLAN handle encryption?

A. Traffic is encrypted with AES and keys derived from a PMK shared by all clients on the WLAN.
B. Traffic is encrypted with AES and keys derived from a unique PMK per client.
C. Traffic is encrypted with TKIP and keys derived from a unique PMK per client.
D. Traffic is encrypted with TKIP and keys derived from a PMK shared by all clients on the WLAN.

Answer: B

Explanation:
WPA3-Enterprise is a security protocol introduced to enhance the security of wireless networks, particularly in enterprise environments. It builds on the foundation of WPA2 but introduces stronger encryption and key management practices. In WPA3-Enterprise, authentication is typically performed using 802.1X, and encryption is handled using the Advanced Encryption Standard (AES).
WPA3-Enterprise Encryption: WPA3-Enterprise uses AES with the Galois/Counter Mode Protocol (GCMP) or Cipher Block Chaining Message Authentication Code Protocol (CCMP), both of which are AES-based encryption methods. WPA3 does not use TKIP (Temporal Key Integrity Protocol), which is a legacy encryption method used in WPA and early WPA2 deployments and is considered insecure.
Pairwise Master Key (PMK): In WPA3-Enterprise, the PMK is derived during the 802.1X authentication process (e.g., via EAP-TLS or EAP-TTLS). Each client authenticates individually with the authentication server (e.g., ClearPass), resulting in a unique PMK for each client. This PMK is then used to derive session keys (Pairwise Transient Keys, PTKs) for encrypting the client's traffic, ensuring that each client's traffic is encrypted with unique keys.
Option A, "Traffic is encrypted with TKIP and keys derived from a PMK shared by all clients on the WLAN," is incorrect because WPA3 does not use TKIP (it uses AES), and the PMK is not shared among clients in WPA3-Enterprise; each client has a unique PMK.
Option B, "Traffic is encrypted with TKIP and keys derived from a unique PMK per client," is incorrect because WPA3 does not use TKIP; it uses AES.
Option C, "Traffic is encrypted with AES and keys derived from a PMK shared by all clients on the WLAN," is incorrect because, in WPA3-Enterprise, the PMK is unique per client, not shared.
Option D, "Traffic is encrypted with AES and keys derived from a unique PMK per client," is correct. WPA3-Enterprise uses AES for encryption, and each client derives a unique PMK during 802.1X authentication, which is used to generate unique session keys for encryption.
The HPE Aruba Networking AOS-8 8.11 User Guide states:
"WPA3-Enterprise enhances security by using AES encryption with GCMP or CCMP. In WPA3-Enterprise mode, each client authenticates via 802.1X, resulting in a unique Pairwise Master Key (PMK) for each client. The PMK is used to derive session keys (Pairwise Transient Keys, PTKs) that encrypt the client's traffic with AES, ensuring that each client's traffic is protected with unique keys. WPA3 does not support TKIP, which is a legacy encryption method." (Page 285, WPA3-Enterprise Security Section) Additionally, the HPE Aruba Networking Wireless Security Guide notes:
"WPA3-Enterprise requires 802.1X authentication, which generates a unique PMK for each client. This PMK is used to derive AES-based session keys, providing individualized encryption for each client's traffic and eliminating the risks associated with shared keys." (Page 32, WPA3 Security Features Section)
:
HPE Aruba Networking AOS-8 8.11 User Guide, WPA3-Enterprise Security Section, Page 285.
HPE Aruba Networking Wireless Security Guide, WPA3 Security Features Section, Page 32.

NEW QUESTION # 24
A client is connected to a Mobility Controller (MC). These firewall rules apply to this client's role:
ipv4 any any svc-dhcp permit
ipv4 user 10.5.5.20 svc-dns permit
ipv4 user 10.1.5.0 255.255.255.0 https permit
ipv4 user 10.1.0.0 255.255.0.0 https deny_opt
ipv4 user any any permit
What correctly describes how the controller treats HTTPS packets to these two IP addresses, both of which are on the other side of the firewall:
10.1.20.1
10.5.5.20

A. Both packets are permitted.
B. Both packets are denied.
C. The first packet is permitted, and the second is denied.
D. The first packet is denied, and the second is permitted.

Answer: D

Explanation:
In an HPE Aruba Networking AOS-8 Mobility Controller (MC), firewall rules are applied based on the user role assigned to a client. The rules are evaluated in order, and the first matching rule determines the action (permit or deny) for the packet. The client's role has the following firewall rules:
ipv4 any any svc-dhcp permit: Permits DHCP traffic (UDP ports 67 and 68) from any source to any destination.
ipv4 user 10.5.5.20 svc-dns permit: Permits DNS traffic (UDP port 53) from the user to the IP address 10.5.5.20.
ipv4 user 10.1.5.0 255.255.255.0 https permit: Permits HTTPS traffic (TCP port 443) from the user to the subnet 10.1.5.0/24.
ipv4 user 10.1.0.0 255.255.0.0 https deny_opt: Denies HTTPS traffic from the user to the subnet 10.1.0.0/16, with the deny_opt action (which typically means deny with an optimized action, such as dropping the packet without logging).
ipv4 user any any permit: Permits all other traffic from the user to any destination.
The question asks how the MC treats HTTPS packets (TCP port 443) to two IP addresses: 10.1.20.1 and 10.5.5.20.
HTTPS packet to 10.1.20.1:
Rule 1: Does not match (traffic is HTTPS, not DHCP).
Rule 2: Does not match (destination is 10.1.20.1, not 10.5.5.20; traffic is HTTPS, not DNS).
Rule 3: Does not match (destination 10.1.20.1 is not in the subnet 10.1.5.0/24).
Rule 4: Matches (destination 10.1.20.1 is in the subnet 10.1.0.0/16, and traffic is HTTPS). The action is deny_opt, so the packet is denied.
HTTPS packet to 10.5.5.20:
Rule 1: Does not match (traffic is HTTPS, not DHCP).
Rule 2: Does not match (traffic is HTTPS, not DNS).
Rule 3: Does not match (destination 10.5.5.20 is not in the subnet 10.1.5.0/24).
Rule 4: Does not match (destination 10.5.5.20 is not in the subnet 10.1.0.0/16).
Rule 5: Matches (catches all other traffic). The action is permit, so the packet is permitted.
Therefore, the HTTPS packet to 10.1.20.1 is denied, and the HTTPS packet to 10.5.5.20 is permitted.
Option A, "Both packets are denied," is incorrect because the packet to 10.5.5.20 is permitted.
Option B, "The first packet is permitted, and the second is denied," is incorrect because the packet to 10.1.20.1 (first) is denied, and the packet to 10.5.5.20 (second) is permitted.
Option C, "Both packets are permitted," is incorrect because the packet to 10.1.20.1 is denied.
Option D, "The first packet is denied, and the second is permitted," is correct based on the rule evaluation.
The HPE Aruba Networking AOS-8 8.11 User Guide states:
"Firewall policies on the Mobility Controller are evaluated in order, and the first matching rule determines the action for the packet. For example, a rule such as ipv4 user 10.1.0.0 255.255.0.0 https deny_opt will deny HTTPS traffic to the specified subnet, while a subsequent rule like ipv4 user any any permit will permit all other traffic that does not match earlier rules. The 'user' keyword in the rule refers to the client's IP address, and the rules are applied to traffic initiated by the client." (Page 325, Firewall Policies Section) Additionally, the guide notes:
"The deny_opt action in a firewall rule drops the packet without logging, optimizing performance for high-volume traffic. Rules are processed sequentially, and only the first matching rule is applied." (Page 326, Firewall Actions Section)
:
HPE Aruba Networking AOS-8 8.11 User Guide, Firewall Policies Section, Page 325.
HPE Aruba Networking AOS-8 8.11 User Guide, Firewall Actions Section, Page 326.

NEW QUESTION # 25
What is one difference between EAP-Tunneled Layer security (EAP-TLS) and Protected EAP (PEAP)?

A. EAP-TLS requires the supplicant to authenticate with a certificate, hut PEAP allows the supplicant to use a username and password.
B. EAP-TLS creates a TLS tunnel for transmitting user credentials, while PEAP authenticates the server and supplicant during a TLS handshake.
C. EAP-TLS creates a TLS tunnel for transmitting user credentials securely while PEAP protects user credentials with TKIP encryption.
D. EAP-TLS begins with the establishment of a TLS tunnel, but PEAP does not use a TLS tunnel as part of Its process

Answer: A

NEW QUESTION # 26
......

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Jim Moore Jim Moore

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