Which of the following features are not available in PW OAM?

The function of PW OAM is basically the same as that of Tunnel. The PW OAM mechanism can effectively detect, confirm and locate defects and faults originating from the PW layer network.

Which of the following features are not available in PW OAM?
A . LB
B . Ping
C . BDI
D . FDI

Answer: B