Which command is used to enable LLDP globally on a Cisco IOS ISR?
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A. B. C. D. E.A.
Link Layer Discovery Protocol (LLDP) is an industry standard protocol that allows devices to advertise, and discover connected devices, and there capabilities (same as CDP of Cisco)
To enable it on Cisco devices, we have to use this command under global configuration mode: Sw(config)# lldp run.
The correct answer to enable LLDP (Link Layer Discovery Protocol) globally on a Cisco IOS ISR (Integrated Services Router) is A. lldp run.
LLDP is a protocol that allows network devices to advertise information about themselves, such as their identity, capabilities, and connected neighbors, to other devices on the network. Enabling LLDP globally on a Cisco IOS ISR ensures that the router will advertise its own information and receive information from other devices on the network.
The command "lldp run" is used to enable LLDP globally on a Cisco IOS ISR. This command must be entered in global configuration mode, which can be accessed by entering "configure terminal" from privileged EXEC mode.
The other options listed in the question are not correct for enabling LLDP on a Cisco IOS ISR. "lldp enable" and "lldp transmit" are not valid commands in Cisco IOS, and "cdp run" and "cdp enable" are commands used for enabling CDP ( Cisco Discovery Protocol), which is a similar protocol to LLDP used in Cisco networks.
In summary, to enable LLDP globally on a Cisco IOS ISR, the correct command is "lldp run", entered in global configuration mode.