An engineer must configure neighbor discovery between the company router and an ISP. What is the next step to complete the configuration if the ISP uses a third...

An engineer must configure neighbor discovery between the company router and an ISP. What is the next step to complete the configuration if the ISP uses a third-party router?

A. Enable LLDP globally. B. Disable CDP on gi0/0. C. Enable LLDP TLVs on the ISP router. D. Disable auto-negotiation.