HP HPE6-A78 Exam With Confidence Using Practice Dumps

In an AOS-CX switch environment, 802.1X authentication is used to authenticate clients connecting to ports, and roles are assigned based on the authentication outcome and configuration. The roles mentioned in the question—fallback, auth, and critical—have specific purposes in the AOS-CX port-access configuration:

Auth role (roleB): This role is applied when a client successfully authenticates via 802.1X and no specific role is assigned by the RADIUS server (e.g., via an Aruba-User-Role VSA). It is the default role for successful authentication.

Fallback role (roleA): This role is applied when no authentication method is attempted (e.g., the client does not support 802.1X or MAC authentication and no other method is configured).

Critical role (roleC): This role is applied when the switch cannot contact the RADIUS server (e.g., during a server timeout or failure), allowing the client to have limited access in a "critical" state.

In this scenario, the client successfully authenticates via 802.1X, and CPPM does not send an Aruba-User-Role VSA. Since authentication is successful, the switch applies the auth role (roleB) as the default role for successful authentication when no specific role is provided by the RADIUS server.

Option A, "The client receives roleC," is incorrect because the critical role is only applied when the RADIUS server is unreachable, which is not the case here since authentication succeeded.

Option B, "The client is denied access," is incorrect because the client successfully authenticated, so access is granted with the appropriate role.

Option D, "The client receives roleA," is incorrect because the fallback role is applied only when no authentication is attempted, not when authentication succeeds.

The HPE Aruba Networking AOS-CX 10.12 Security Guide states:

"When a client successfully authenticates using 802.1X, the switch assigns the client to the auth role configured for the port, unless the RADIUS server specifies a different role via the Aruba-User-Role VSA. If no Aruba-User-Role VSA is present in the Access-Accept message, the auth role is applied." (Page 132, 802.1X Authentication Section)

Additionally, the guide clarifies the roles:

"Auth role: Applied after successful 802.1X or MAC authentication if no role is specified by the RADIUS server."

"Fallback role: Applied when no authentication method is attempted."

"Critical role: Applied when the RADIUS server is unavailable." (Page 134, Port-Access Roles Section)

The company wants to deploy an open WLAN for guests with the following requirements:

Guests connect without entering a password (open authentication).

Guests are redirected to a welcome web page and log in (captive portal).

Encryption is provided for devices that support it.

Open WLAN with Captive Portal: An open WLAN means no pre-shared key (PSK) or 802.1X authentication is required to connect. A captive portal can be used to redirect users to a web page where they must log in (e.g., with guest credentials). This meets the requirement for guests to connect without a password and then log in via a web page.

Encryption for Capable Devices: The company wants to provide encryption for devices that support it, even on an open WLAN. Opportunistic Wireless Encryption (OWE) is a WPA3 feature designed for open networks. OWE provides encryption without requiring a password by negotiating unique encryption keys for each client using a Diffie-Hellman key exchange. OWE in transition mode allows both OWE-capable devices (which use encryption) and non-OWE devices (which connect without encryption) to join the same SSID, ensuring compatibility.

Option A, "Opportunistic Wireless Encryption (OWE) and WPA3-Personal," is incorrect. WPA3-Personal requires a pre-shared key (password), which conflicts with the requirement for guests to connect without entering a password.

Option B, "Captive portal and WPA3-Personal," is incorrect for the same reason. WPA3-Personal requires a password, which does not meet the open WLAN requirement.

Option C, "WPA3-Personal and MAC-Auth," is incorrect. WPA3-Personal requires a password, and MAC authentication (MAC-Auth) does not provide the web-based login experience (captive portal) specified in the requirements.

Option D, "Captive portal and Opportunistic Wireless Encryption (OWE) in transition mode," is correct. An open WLAN with OWE in transition mode allows guests to connect without a password, provides encryption for OWE-capable devices (e.g., WPA3 devices), and supports non-OWE devices without encryption. The captive portal ensures that guests are redirected to a welcome web page to log in, meeting all requirements.

The HPE Aruba Networking AOS-8 8.11 User Guide states:

"Opportunistic Wireless Encryption (OWE) is a WPA3 feature that provides encryption for open WLANs without requiring a password. In OWE transition mode, the WLAN supports both OWE-capable devices (which use encryption) and non-OWE devices (which connect without encryption) on the same SSID. This is ideal for guest networks where encryption is desired for capable devices, but compatibility with all devices is required. A captive portal can be configured on an open WLAN to redirect users to a login page, such as captive-portal guest-login, ensuring a seamless guest experience." (Page 290, OWE and Captive Portal Section)

Additionally, the HPE Aruba Networking Wireless Security Guide notes:

"OWE in transition mode is recommended for open guest WLANs where encryption is desired for devices that support it. Combined with a captive portal, this setup allows guests to connect without a password, get redirected to a login page, and benefit from encryption if their device supports OWE." (Page 35, Guest Network Security Section)

In an HPE Aruba Networking AOS-8 solution, the Wireless Intrusion Prevention (WIP) system is used to detect and classify rogue Access Points (APs). When a rogue AP is detected, the AOS system provides various pieces of information about the detected radio, such as the SSID, BSSID, match method, match type, confidence level, and the devices that detected the rogue AP. The goal is to locate the physical rogue device, which requires identifying its approximate location in the network environment.

Option A, "The detecting devices," is correct. The "detecting devices" refer to the authorized APs or radios that detected the rogue AP’s signal. This information is critical for locating the rogue device because it provides the physical locations of the detecting APs. By knowing which APs detected the rogue AP and their signal strength (RSSI) readings, you can triangulate the approximate location of the rogue AP. For example, if AP-1 in Building A and AP-2 in Building B both detect the rogue AP, and AP-1 reports a stronger signal, the rogue AP is likely closer to AP-1 in Building A.

Option B, "The match method," is incorrect. The match method (e.g., "Plus one," "Eth-Wired-Mac-Table") indicates how the rogue AP was classified (e.g., based on a BSSID close to a known MAC or its presence on the wired network). While this helps understand why the AP was classified as rogue, it does not directly help locate the physical device.

Option C, "The confidence level," is incorrect. The confidence level indicates the likelihood that the AP is correctly classified as rogue (e.g., 90% confidence). This is useful for assessing the reliability of the classification but does not provide location information.

Option D, "The match type," is incorrect. The match type (e.g., "Rogue," "Suspected Rogue") specifies the category of the classification. Like the match method, it helps understand the classification but does not aid in physically locating the device.

The HPE Aruba Networking AOS-8 8.11 User Guide states:

"When a rogue AP is detected by the Wireless Intrusion Prevention (WIP) system, the ‘detecting devices’ information lists the authorized APs or radios that detected the rogue AP’s signal. This is the most useful information for locating the rogue device, as it provides the physical locations of the detecting APs. By analyzing the signal strength (RSSI) reported by each detecting device, you can triangulate the approximate location of the rogue AP. For example, if AP-1 and AP-2 detect the rogue AP, and AP-1 reports a higher RSSI, the rogue AP is likely closer to AP-1." (Page 416, Rogue AP Detection Section)

Additionally, the HPE Aruba Networking Security Guide notes:

"To locate a rogue AP, use the ‘detecting devices’ information in the AOS Detected Radios page. This lists the APs that detected the rogue AP, along with signal strength data, enabling triangulation to pinpoint the rogue device’s location." (Page 80, Locating Rogue APs Section)