HPE7-A01 practice question 9 of 25

You must ensure the HPEAruba network you are configuring for a client is capable of plug-and-play provisioning of access points. What enables this capability?

Full set: 117 questions
Answer options
A: UCC Service
B: LLDP-MED Correct answer
C: SRTP
D: CSMA
Correct Answer:
B. LLDP-MED
Explanation

LLDP-MED (Link Layer Discovery Protocol - Media Endpoint Discovery) enables plug-and-play provisioning. It is an extension to LLDP that allows network switches to automatically provide configuration information to connected endpoints, such as access points (APs) and VoIP phones. The switch can advertise network policies, including the correct management VLAN ID, Power over Ethernet (PoE) levels, and Quality of Service (QoS) priorities. The AP uses this information to configure itself, join the correct network segment, and subsequently discover its mobility controller, streamlining the deployment process without manual intervention.

Why Incorrect

A. UCC Service: The Unified Communications and Collaboration (UCC) service is designed to optimize and prioritize real-time application traffic like voice and video, not for initial hardware provisioning of network devices.
C. SRTP: Secure Real-time Transport Protocol (SRTP) is a security profile for RTP that provides encryption and authentication for real-time media streams. It is unrelated to device provisioning.
D. CSMA: Carrier-Sense Multiple Access (CSMA) is a media access control protocol that governs how devices on a shared network medium transmit data. It is a fundamental networking concept, not a provisioning feature.

References

1. ArubaOS-Switch Management and Configuration Guide (K.16.01): Chapter 18, "LLDP and LLDP-MED Configuration," page 381. The guide states, "LLDP-MED (Link Layer Discovery Protocol-Media Endpoint Discovery) is an extension to LLDP that supports interoperability between... endpoint devices and network devices... It provides a standard protocol for a switch to automatically configure endpoint devices for... VLAN ID, 802.1p priority, and DSCP values." This automatic configuration is the basis of plug-and-play.

2. Aruba Campus Wireless Networks Validated Reference Design (Version 16.10): Section "AP Provisioning," page 21. This document describes the AP boot process where an AP must discover its controller. It notes, "The AP must be on a network that has IP connectivity to the mobility controller." LLDP-MED is a primary mechanism used by the switch to place the AP into the correct VLAN to establish this initial IP connectivity.

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