Home » HP » HP0-Y49 » Which open standard allows a switch with PoE support to correctly determine the power requirements of a connected device?
Which open standard allows a switch with PoE support to correctly determine the power requirements of a connected device?
A. ICMP
B. AutoPower
C. LLDP-MED
D. CDP
Correct Answer: C
Explanation/Reference:
The Link Layer Discovery Protocol (LLDP) is a vendor-neutral link layer protocol in the Internet Protocol Suite used by network devices for advertising their identity, capabilities, and neighbors on an IEEE 802 local area network, principally wired Ethernet. Media Endpoint Discovery is an enhancement of LLDP, known as LLDP-MED, that provides the following facilities:
• Auto-discovery of LAN policies (such as VLAN, Layer 2 Priority and Differentiated services settings) enabling plug and play networking.
• Device location discovery to allow creation of location databases and, in the case of Voice over Internet Protocol (VoIP), Enhanced 911 services.
• Extended and automated power management of Power over Ethernet (PoE) end points.
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