A network engineer needs to ensure that a Cisco switch can discover and be discovered by non-Cisco devices using a standardized protocol at L2. Which protocol should be enabled on the switch?
LLDP
CDP
LACP
DTP
LLDP (Link Layer Discovery Protocol) is a vendor-neutral L2 protocol that allows network devices to advertise their identity and capabilities to neighboring devices, facilitating device discovery in a multi-vendor network. Enabling LLDP on a Cisco switch allows it to interoperate with non-Cisco devices. CDP (Cisco Discovery Protocol) is proprietary to Cisco and only facilitates discovery between Cisco devices. LACP is used for link aggregation, and DTP is used for dynamic trunk negotiation; neither are used for device discovery.
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