You have an FCIP tunnel/circuit bouncing and are experiencing poor performance. You have
issued the portcmd tperf command.
Which statement about the portcmd tperf command is true?

A.
It measures the distance of the link.

B.
It verifies buffer-to-buffer credit link requirements.

C.
It verifies the circuit bandwidth and performance under traffic load.

D.
It verifies the zoning database for device connectivity.