Which statement about LLDP is true?
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A. B. C. D.B
LLDP stands for Link Layer Discovery Protocol, and it is an industry-standard protocol that allows network devices to advertise information about themselves to neighboring devices on the network. LLDP is used to exchange information between devices such as device type, hostname, port ID, VLAN ID, and other useful information.
The correct answer to the question is C. The LLDP update frequency is a fixed value. LLDP frames are sent periodically and contain information about the local device. The LLDP update frequency is a fixed value, which means that the amount of time between updates is consistent and determined by the device configuration. By default, the update frequency is 30 seconds.
Answer A is incorrect because LLDP is not a Cisco proprietary protocol. It is an industry-standard protocol that is supported by many network vendors.
Answer B is also incorrect because LLDP is configured on a per-interface basis, not in global configuration mode.
Answer D is also incorrect because LLDP is a link-layer protocol that operates at layer 2 of the OSI model and does not run over the transport layer.
In summary, LLDP is an industry-standard protocol used to advertise information about devices on a network. The update frequency for LLDP frames is a fixed value, and it operates at layer 2 of the OSI model.