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HP HPE7-A07 Exam Syllabus Topics:

Topic	Details
Topic 1	Troubleshooting: This topic of the HP HPE7-A07 exam assesses skills of a senior HP RF network engineer in troubleshooting. It also assesses the ability to remediate issues in campus networks. It is vital for ensuring network reliability and minimizing downtime in critical environments.
Topic 2	Routing: This Aruba Certified Campus Access Mobility Expert Written exam section measures the ability to design and troubleshoot routing topologies and functions, ensuring that data efficiently navigates through complex networks, a key skill for HP solutions architects.
Topic 3	Switching: Senior HP RF network engineers must demonstrate proficiency in implementing and troubleshooting Layer 2 3 switching, including broadcast domains and interconnection technologies. This ensures seamless and efficient data flow across network segments.
Topic 4	Network Resiliency and Virtualization: This section of the Aruba Certified Campus Access Mobility Expert Written exam assesses the expertise of a senior HP RF network engineer in designing and troubleshooting mechanisms for resiliency, redundancy, and fault tolerance. It is crucial for maintaining uninterrupted network services.
Topic 5	Performance Optimization: The Aruba Certified Campus Access Mobility Expert Written exam focuses on analyzing and remediating performance issues within a network. It measures the ability of a senior RF network engineer to fine-tune network operations for maximum efficiency and speed.

HP Aruba Certified Campus Access Mobility Expert Written Exam Sample Questions (Q78-Q83):

NEW QUESTION # 78
An OSPF router has learned a path to an external network by both an E1 and an E2 advertisement. Both routes have the same path cost. Which path will the router prefer?

A. Both routes will be suppressed until the path conflict has been resolved.
B. The router will prefer the E2 path.
C. The router will prefer the E1 path.
D. The router will use both paths equally utilizing ECMP.

Answer: C

Explanation:
In HPE Aruba Networking (AOS-CX and AOS-Switch) OSPF implementation, the routing behavior for external routes (Type 5 LSAs) distinguishes between two types of external advertisements:
* E1 (Type-1 external) - The total path cost is calculated as the sum of the internal cost to reach the ASBR (Autonomous System Boundary Router) plus the external cost as advertised in the LSA.
* E2 (Type-2 external) - The external cost is considered independent of the internal OSPF path cost to reach the ASBR. Thus, the metric used is only the external cost from the LSA.
When both an E1 and an E2 route exist to the same external destination, OSPF gives preference to the E1 route, regardless of metric values, because the E1 route represents a more accurate total cost to the destination (including internal OSPF cost).
Extract (as per HPE Aruba OSPF Technical Overview and AOS-CX Routing Guide):
"When both Type-1 (E1) and Type-2 (E2) external LSAs for the same destination are present, the router always prefers the Type-1 route. Type-1 routes include both internal and external costs in the total metric, while Type-2 routes use only the external cost. The E1 path is therefore considered more precise and is selected as the preferred route." This is consistent across Aruba's OSPF implementation and follows standard OSPF behavior as defined by the protocol (RFC 2328).
Therefore, when both E1 and E2 routes are available and have the same overall cost, the router will always prefer the E1 path.
References:* HPE Aruba Networking AOS-CX Routing Configuration Guide - OSPF External Route Preference (Section: OSPF External LSAs).* HPE Aruba Certified Switching Professional (ACSP) Study Guide - OSPF Route Selection and External Type Behavior.* HPE ArubaOS-Switch Management and Configuration Guide - OSPF External Route Types (E1 vs E2).

NEW QUESTION # 79
Exhibit.

A customer is reporting mat connectivity is Tailing for some wireless client Devices. What are your conclusions from the capture? (Select two.)

A. The network is using WPA2-PSK key management.
B. The client is not receiving an IP address.
C. The client does not have an ARP entry for me default gateway.
D. The client does not support beamforming.
E. The network is using WPA3-SAE key management.

Answer: A,B

Explanation:
The capture shows messages related to WPA key management, indicating WPA2-PSK is being used. Also, the capture includes a DHCP request from the client but no corresponding DHCP ACK, suggesting the client is not receiving an IP address, which could explain the connectivity failure.

NEW QUESTION # 80
You want to configure an MTU of 9198 for a routed lag interface on a CX 6300 switch. Which configuration achieves this?

Answer: B

Explanation:
In the context of ArubaOS-CX, particularly with the 6300 series switches, setting the MTU on a routed Link Aggregation Group (LAG) interface requires the interface lag id command in the configuration, specifying the LAG interface you're configuring. The ip mtu command is then used to set the desired MTU size for that LAG. Option A correctly shows this configuration process, where the MTU is set to 9198 for the LAG interface, in line with the requirements for routing larger frames, which could be necessary for certain applications or data flows that require jumbo frames.
The information related to the configuration of Aruba switches is consistent with the principles and guidelines found in the technical documentation for the ArubaOS-CX 6300 series switches, which emphasizes the importance of correct MTU settings for network performance and stability.

NEW QUESTION # 81
Exhibit.

A university runs its own TV station in the city The IT department deploys a multimedia server so the TV productions can be sent out to the entire campus over the IP network using multicast-based communications in order to improve the bandwidth consumption. PlM sparse Mode and IGMP snooping features are enabled.
When wireless users join the multicast groups, all users connected to the same WLAN experience poor network performance. However, wired users are not affected in this way While troubleshooting the network administrator saves the packet captures shown in the exhibit and concludes that all users even those not joining the multicast group, receive the same multicast flow at slow speeds.
Which features should the network administrator enable to fix the problem?

A. UCC QoS correction and Multicast Transmission Optimization
B. Dynamic Multicast Optimization and Multicast Transmission Optimization
C. ARP broadcast conversion into unicast and Multicast Transmission Optimization
D. Dynamic Multicast Optimization and UCC QoS correction

Answer: B

Explanation:
Dynamic Multicast Optimization (DMO) and Multicast Transmission Optimization are features that can help address issues with multicast traffic in wireless environments. DMO optimizes the way multicast traffic is transmitted over the air by converting multicast streams into unicast streams to the clients that need them.
This reduces unnecessary traffic for clients that have not subscribed to the multicast group and can improve overall network performance. Multicast Transmission Optimization adjusts the transmission rate of multicast frames to ensure they are sent at optimal speeds, addressing the issue of multicast flow being received at slow speeds by all users.

NEW QUESTION # 82
Refer to the exhibit.

A customer is reporting that connectivity is failing for some wireless client devices. What is your conclusion based on the capture?

A. The SSID is using WPA3-Enterprise key management
B. The client does not have an ARP entry for the default gateway
C. The client has not obtained an IP address on this network previously
D. The AP is using 20MHz wide 5GHz channels

Answer: B

Explanation:
In the provided frame capture, we can clearly observe the following sequence of events:
* 802.11 Association and 4-Way Handshake:
* The client (MAC 20:0d:b0:41:5d:b6) associates with the AP (b8:3a:5a:84:24:30).
* The EAPOL 4-way handshake successfully completes (Key Messages 1-4), indicating that the client has successfully joined the secured SSID.
* This rules out authentication issues or WPA3 key management errors.
* DHCP Exchange:
* The client sends a DHCP Request, and the server responds with a DHCP ACK, confirming that the client has successfully obtained an IP address.
* Example in the capture:
* DHCP Request - Transaction ID 0xd3da62ef
* DHCP ACK - Transaction ID 0xd3da62ef
This confirms that DHCP negotiation completed successfully.
* ARP Requests and Replies:
* After DHCP completion, an ARP broadcast is seen:
* Who has 192.168.10.17? Tell 192.168.10.158
This is a normal ARP request from another device trying to reach 192.168.10.17.
* However, we also see ARP replies for:
* 192.168.10.1 is at 00:1c:7f:7b:d2:4d
This indicates the default gateway responding with its MAC address.
* Analysis of the Connectivity Issue:Even though the gateway is sending ARP replies, the repeated ARP responses for 192.168.10.1 in the capture suggest that the client is not caching or acknowledging the ARP entry for the default gateway. This behavior is consistent with a client that does not have a valid or populated ARP entry for its default gateway, leading to traffic failures beyond the local subnet.
This could be due to:
* Incorrect ARP response handling on the client.
* Firewall or driver issues preventing the ARP reply from being processed.
* Power-save or roaming conditions where the ARP table did not update properly.
Exact Extract from HPE Aruba Networking Switching and WLAN Troubleshooting Documentation:
"If a client successfully completes the 4-way handshake and DHCP exchange but fails to pass traffic beyond the local subnet, check for ARP resolution issues.
Missing or invalid ARP entries for the default gateway can prevent Layer 3 connectivity even though the wireless association is successful."
"Wireshark traces showing repeated ARP replies from the gateway indicate that the gateway is responding, but the client may not be updating its ARP cache, leading to connectivity failures." Hence, the conclusion is that the client's ARP entry for the default gateway is missing or invalid, explaining why connectivity fails despite successful association and DHCP negotiation.
Why the Other Options Are Incorrect:
* B. The SSID is using WPA3-Enterprise key management:The handshake shown (EAPOL 4 messages) uses the standard WPA2/AES (EAPOL-Key) exchange. There are no SAE or WPA3 transition frames present.
"WPA3 uses SAE or 802.1X with PMF indicators; the frame capture shows standard WPA2 key exchange."
* C. The client has not obtained an IP address on this network previously:The DHCP Request and ACK exchange confirm that the client has obtained an IP address (192.168.10.158). This option is invalid.
"A completed DHCP ACK indicates the client successfully received an IP address."
* D. The AP is using 20MHz wide 5GHz channels:The frame capture shows VHT/HE announcements, which indicate High Efficiency (HE) capabilities and channel sounding, not 20MHz restrictions.
Channel width has no relation to the connectivity failure described.
"VHT/HE frames are part of 802.11ac/ax operation and do not indicate channel width problems." References of HPE Aruba Networking Switching Documents or Study Guide:
* Aruba WLAN Troubleshooting and Analysis Guide - "ARP, DHCP, and Gateway Reachability Troubleshooting."
* ArubaOS 10 Wireless Fundamentals and Diagnostics Guide - "802.11 Association, 4-Way Handshake, and ARP Behavior."
* Aruba Client Connectivity Troubleshooting Guide (AOS-10 and AOS-8) - "Identifying ARP Cache Issues Post-DHCP Assignment."
* Aruba Network Access and Layer 2 Troubleshooting Guide - "Role of ARP in Wireless Client Connectivity."

NEW QUESTION # 83
......

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