In the southbound protocol of the controller, the () protocol is the LSP communication protocol between NCE and PCC. PCC reports LSP status information to NCE, and NCE notifies PCC to update the tunnel LSP.

In the southbound protocol of the controller, the () protocol is the LSP communication protocol between NCE and PCC. PCC reports LSP status information to NCE, and NCE notifies PCC to update the tunnel LSP.
A . PCEP
B . Netconf
C . BGP-LS
D . SNMP

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Answer: A