HP HPE7-A07 Exam With Confidence Using Practice Dumps

In the design shown:

The BGP peering between agg-sw1 and agg-sw2 is being established using loopback interfaces as the BGP neighbor addresses (10.0.0.2 and 10.0.0.4)

When BGP peering uses loopbacks, you must configure the BGP session to originate updates from the same loopback interface that the neighbor’s address resolves to

Otherwise, the TCP session fails because:

The source IP does not match the configured neighbor remote-IP which is based on the loopback address

Aruba AOS-CX requirement:

“When configuring eBGP or iBGP neighbors using loopback interfaces, apply update-source under the IPv4 unicast address family so BGP uses the correct source interface for peering.”

Comprehensive and Detailed Explanation From Exact Extract of HPE Aruba Networking Switching:

Accurate and trusted time on gateways is essential for audit logs. Aruba gateways and AOS-CX switches support NTP authentication, where the device and the NTP server share cryptographic keys (key-id with MD5/SHA-1 depending on platform). The device accepts time updates only from servers that successfully authenticate, protecting against spoofed NTP responses and time-shifting attacks.

Exact extract:

“Configure NTP authentication to verify time sources. Define an authentication key, mark it as trusted, and associate it with the NTP server. The device will synchronize time only with authenticated servers.”

“Accurate logging relies on NTP. Enabling authentication helps prevent malicious or accidental tampering with system time.”

Thus, enabling and configuring NTP authentication directly secures the time clock against attacks, making B correct.

Option A would block time synchronization; C (a generic ACL) does not provide cryptographic validation; D changes only display/timezone and does not secure the source of time.

References of HPE Aruba Networking Switching documents or Study Guide:

ArubaOS 10 Gateway Management and Security Guide — “Configuring NTP authentication (keys, trusted key, server association).”

Aruba AOS-CX System Management Guide — “Securing NTP and its impact on event/audit logs.”

In a VXLAN environment, unknown unicast traffic, such as ARP requests from H1, which does not have a specific destination MAC address learned by the switch A2, will be flooded out of all interfaces. This flooding behavior is necessary because A2 needs to ensure that the ARP request reaches its intended destination, which might be on any of the interfaces. It's a part of the standard behavior of switches to handle ARP traffic when the destination hardware address is unknown.