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/2018080911041443949.jpg?sign=bee21380143052a3da3d6dd8737a88a2&t=62d35849" />
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