Given the configuration shown in the exhibit, what is the function of the protect-loopback filter?()<br /> <img src="https://nimg.ppkao.com/2018-08/yiyu/2018080911520220513.jpg?sign=174f7d11eaaf107e43656747aa46e891&t=62d1eecc" />
A、to protect the Routing Engine
B、to protect all interfaces on the device
C、to protect the Packet Forwarding Engine
D、to protect the management interface