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| Section | Objectives |
|---|---|
| Networking Fundamentals | - Basic switching and routing concepts - OSI model and TCP/IP basics - IP addressing and subnetting |
| Security and Access Control | - Authentication methods (802.1X) - Role-based access control - Network segmentation (VLANs, policies) |
| Aruba Campus Access Architecture | - Aruba access layer components - Aruba OS-CX switching fundamentals - Campus network design principles |
| Operations and Troubleshooting | - Basic network troubleshooting tools - Monitoring and logging concepts |
| Wireless LAN Fundamentals | - Wi-Fi standards and concepts - Access point operation and roaming concepts - SSID and WLAN configuration basics |
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NEW QUESTION # 83
Which statement about manual switch provisioning with Aruba Central is correct?
Answer: A
Explanation:
Manual switch provisioning in Aruba Central can be done without relying on DNS services, but it does require DHCP to assign IP addresses to the switches. DHCP is essential for the switches to obtain an IP address, which is necessary for them to communicate within the network and with Aruba Central for management and configuration purposes. DNS, on the other hand, is not strictly required for manual provisioning as direct IP addresses or other methods can be used to connect to Aruba Central or other management interfaces.
NEW QUESTION # 84
When using the OSPF dynamic routing protocol on an Aruba CX switch, what must match on the neighboring devices to exchange routes?
Answer: A
Explanation:
OSPF Open Shortest Path First. OSPF is a link-state routing protocol that uses a hierarchical structure to create a routing topology for IP networks. OSPF routers exchange routing information with their neighbors using Hello packets, which are sent periodically on each interface. To establish an adjacency Adjacency is a relationship formed between selected neighboring routers for the purpose of exchanging routing information., OSPF routers must agree on several parameters, including Hello timers, which specify how often Hello packets are sent on an interface. If the Hello timers do not match between neighboring routers, they will not form an adjacency and will not exchange routes. References:https://www.arubanetworks.com/techdocs
/ArubaOS_86_Web_Help/Content/arubaos-solutions/osfp/osfp.htm
NEW QUESTION # 85
What device in a WLAN is ultimately responsible for the decision to roam to a new AP?
Answer: A
NEW QUESTION # 86
What is a weakness introduced into the WLAN environment when WPA2-Personal is used for security?
Answer: C
Explanation:
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 AuthenticatorNonce (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 Extensible Authentication 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
NEW QUESTION # 87
You need to ensure that voice traffic sent through an ArubaOS-CX switch arrives with minimal latency. What is the best scheduling technology to use for this task?
Answer: D
Explanation:
Strict queuing is the best scheduling technology for ensuring that voice traffic, which is sensitive to latency, is prioritized above other types of traffic. This method ensures that voice traffic is sent first before other queued traffic, effectively reducing the possibility of delay.
NEW QUESTION # 88
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