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| Section | Objectives |
|---|---|
| Topic 1: Networking Fundamentals | - OSI model and TCP/IP basics - Basic switching and routing concepts - IP addressing and subnetting |
| Topic 2: Aruba Campus Access Architecture | - Campus network design principles - Aruba access layer components - Aruba OS-CX switching fundamentals |
| Topic 3: Security and Access Control | - Authentication methods (802.1X) - Role-based access control - Network segmentation (VLANs, policies) |
| Topic 4: Wireless LAN Fundamentals | - SSID and WLAN configuration basics - Access point operation and roaming concepts - Wi-Fi standards and concepts |
| Topic 5: Operations and Troubleshooting | - Basic network troubleshooting tools - Monitoring and logging concepts |
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73. Frage
What is the recommended VSF topology? (Select two.)
Antwort: A,B
Begründung:
Explanation
Only: Daisy chain plus MAD and ring are the recommended VSF topologies for Aruba switches. They provide high availability and redundancy for the VSF stack. MAD (Multiple Active Detection) is a mechanism to detect and resolve split-brain scenarios in a VSF stack.
References:https://www.arubanetworks.com/techdocs/AOS-CX/10.04/HTML/5200-6790/GUID-D6EF042E-EEE
74. Frage
Which feature can network administrators use to centralized RF planning and optimization service when using an Aruba mobility master architecture?
Antwort: B
Begründung:
AirMatch is a feature that provides centralized RF planning and optimization service for Aruba wireless networks. It uses cloud-based algorithms and machine learning to optimize the RF performance and user experience.
References: https://www.arubanetworks.com/assets/ds/DS_AirMatch.pdf
75. Frage
What is a weakness introduced into the WLAN environment when WPA2-Personal is used for security?
Antwort: B
Begründung:
The weakness introduced into WLAN environment when WPA2-Personal is used for security is that PMK Pairwise Master Key (PMK) is a key that is derived from PSK Pre-shared Key (PSK) is a key that is shared between two parties before communication begins , which are both fixed. This means that all users who know PSK can generate PMK without any authentication process. This also means that if PSK or PMK are compromised by an attacker, they can be used to decrypt all traffic encrypted with PTK Pairwise Temporal Key (PTK) is a key that is derived from PMK, ANonce Authenticator Nonce (ANonce) is a random number generated by an authenticator (a device that controls access to network resources, such as an AP), SNonce Supplicant Nonce (SNonce) is a random number generated by supplicant (a device that wants to access network resources, such as an STA), AA Authenticator Address (AA) is MAC address of authenticator, SA Supplicant Address (SA) is MAC address of supplicant using Pseudo-Random Function (PRF). PTK consists of four subkeys: KCK Key Confirmation Key (KCK) is used for message integrity check, KEK Key Encryption Key (KEK) is used for encryption key distribution, TK Temporal Key (TK) is used for data encryption, MIC Message Integrity Code (MIC) key. .
The other options are not weaknesses because:
* It uses X 509 certificates generated by a Certification Authority: This option is false because WPA2- Personal does not use X 509 certificates or Certification Authority for authentication. X 509 certificates and Certification Authority are used in WPA2-Enterprise mode, which uses 802.1X and EAP ExtensibleAuthentication Protocol (EAP) is an authentication framework that provides support for multiple authentication methods, such as passwords, certificates, tokens, or biometrics. EAP is used in wireless networks and point-to-point connections to provide secure authentication between a supplicant (a device that wants to access the network) and an authentication server (a device that verifies the credentials of the supplicant). for user authentication with a RADIUS server Remote Authentication Dial-In User Service (RADIUS) is a network protocol that provides centralized authentication, authorization, and accounting (AAA) management for users who connect and use a network service .
* The Pairwise Temporal Key (PTK) is specific to each session: This option is false because PTK being specific to each session is not a weakness but a strength of WPA2-Personal. PTK being specific to each session means that it changes periodically during communication based on time or number of packets transmitted. This prevents replay attacks and increases security of data encryption.
* It does not use the WPA 4-Way Handshake: This option is false because WPA2-Personal does use the WPA 4-Way Handshake for key negotiation. The WPA 4-Way Handshake is a process that allows the station and the access point to exchange ANonce and SNonce and derive PTK from PMK. The WPA 4- Way Handshake also allows the station and the access point to verify each other's PMK and confirm the installation of PTK.
References: https://en.wikipedia.org/wiki/Wi-Fi_Protected_Access#WPA_key_hierarchy_and_management
https://www.cwnp.com/wp-content/uploads/pdf/WPA2.pdf
76. Frage
What are two advantages of a UXl? (Select two.)
Antwort: B,C
Begründung:
A UXI (User Experience Insight) is a device that simulates user behavior and tests network performance from the user perspective. It can check different applications, such as HTTP, VOIP, or Office 365, and measure metrics such as latency, jitter, packet loss, and throughput.References:https://www.arubanetworks.com
/products/networking/user-experience-insight/
A User Experience Insight (UXI) sensor, such as those used in Aruba networks, is designed to mimic client behavior and test the performance of various network services and applications from the user's perspective. It can simulate user activities and measure the quality of experience for different applications, including HTTP, VOIP, and cloud services like Office 365, providing valuable insights into network performance and user experience.
77. Frage
A customer with 1,860 employees has just implemented user and device certificates via a company-wide Group Based Policy (GPO). When authenticating to the network, which EAP method chains user and machine authentication in one RADIUS session?
Antwort: C
Begründung:
EAP-TEAP supports EAP chaining, allowing both machine and user certificate authentication within a single RADIUS session, which aligns with GPO-based deployments.
78. Frage
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