HPE6-A85過去問、HPE6-A85入門知識

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HP HPE6-A85 Exam Syllabus Topics:

Section	Weight	Objectives
Troubleshooting	4%	- Troubleshooting methodologies - Common network issues resolution
Network Resiliency and Virtualization	8%	- Virtual switching concepts - Redundancy and fault tolerance - Infrastructure device management
Performance Optimization	3%	- QoS principles and implementation
Authentication and Authorization	6%	- Access control methods - AAA concepts and operation
Network Stack	7%	- OSI Model layers and architectural elements - TCP/IP stack concepts
WLAN	18%	- Roaming and mobility basics - WLAN security and SSID setup - AP configuration and groups - Radio Frequency (RF) attributes
Connectivity	10%	- Infrastructure deployment principles - Foundational networking architectures
Switching	19%	- Campus architecture design - Layer 2/Layer 3 technologies - Aruba CX switch configuration - VLANs, trunking and STP
Management and Monitoring	7%	- Network monitoring tools - Health and performance assessment - Aruba Central management platform
Routing	9%	- Static routing configuration - Routing topology design - Dynamic routing protocols
Security	9%	- ACLs and traffic filtering - ClearPass integration basics - Wired and wireless security policies - Security standards and concepts

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HP Aruba Certified Campus Access Associate Exam 認定 HPE6-A85 試験問題 (Q91-Q96):

質問 # 91
When using the OSPF dynamic routing protocol on an Aruba CX switch, what must match on the neighboring devices to exchange routes?

A. DR configuration
B. Hello timers
C. ECMP method
D. BDR configuration

正解：B

解説：
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.

質問 # 92
A customer has just implemented user and device certificates via a company-wide Group Based Policy (GPO). Which EAP method requires client certificates when authenticating to the network?

A. PEAP
B. EAP-TTLS
C. EAP-TEAP
D. EAP-TLS

正解：D

解説：
EAP-TLS is an authentication method that requires client certificates when authenticating to the network. It provides mutual authentication between the client and the server using public key cryptography and digital certificates.

質問 # 93
You put in a few show commands on switches EDGE1 and CORE1 to attempt to gather information to troubleshoot the issue Use the show command output images to determine the reason for the EDGE1 uplink being down

A. LACP is not configured on the Core uplink
B. Spanning-Tree block state is preventing the Core uplink from having connectivity to the edge
C. The Core is connected to the incorrect physical interlaces
D. The physical interfaces are not members of the correct LAG.

正解：A

解説：
Explanation
LACP is a protocol that allows multiple physical links to be aggregated into a single logical link for increased bandwidth and redundancy. LACP must be configured on both ends of the link for it to work properly. In this case, EDGE1 has LACP configured on its uplink port-channel 1, but CORE1 does not have LACP configured on its corresponding port-channel 1. This causes a mismatch and prevents the link from coming up.
References:https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/1-ove

質問 # 94
What are the characteristics of VSF? (Choose two.)

A. VSF forms virtual device by using proprietary stacking cables.
B. VSF forms a virtual device by using standard 10 Gbps/25 Gbps/50 Gbps ports.
C. VSF helps to simplify the network design by reducing the number of logical devices.
D. VSF-Stacks are primarily used at the core layer.
E. VSF-Stacks are limited to 7 members.

正解：B、C

解説：
VSF combines multiple physical switches into a single logical device, simplifying management and design. It uses standard Ethernet interfaces (such as 10G/25G/50G) for stacking links instead of proprietary cables.

質問 # 95
Which part of the WPA Key Hierarchy is used to encrypt and/or decrypt data''

A. Key Confirmation Key (KCK)
B. Pairwise Temporal Key (PTK)
C. Pairwise Master Key (PMK)
D. number used once (nonce)

正解：B

解説：
The part of WPA Key Hierarchy that is used to encrypt and/or decrypt data is Pairwise Temporal Key (PTK).
PTK is a key that is derived from 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 , 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 subkey that is specifically used for data encryption is TK Temporal Key (TK). TK is also known as Pairwise Transient Key (PTK). TK changes periodically during communication based on time or number of packets transmitted.
The other options are not part of WPA Key Hierarchy because:
* PMK: PMK is not part of WPA Key Hierarchy, but rather an input for deriving PTK.
* KCK: KCK is part of WPA Key Hierarchy, but it is not used for data encryption, but rather for message integrity check.
* Nonce: Nonce is not part of WPA Key Hierarchy, but rather an input for deriving 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

質問 # 96
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