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Which protocol is used for link discovery when OpenFlow switches are separated by a non-OpenFlow switch?
Correct Answer: A
Explanation/Reference: LLDP is used to discover direct links between switches and BDDP is used to discover the switches in the same broadcast domain. Note: Using a link-discovery module, the controller generates both LLDP and broadcast packets (referred to as BDDPs) and sends them to all neighboring switches on a regular basis. Reference: OpenFlow Controller