In order to study the working mechanism of OSPFv3, an engineer built a network topology as follows. The configurations of R1 and R2 are as follows. What types of LSAs are exchanged between R1 and R2? (Multiple choice)

The RSTP protocol provides a variety of protection functions. For example, when the edge port is configured in the protection state, the processing method after the edge port receives the BPDU message is:

Regarding the stub area in the OSPF protocol, the following statement which is correct? (Multiple Choice)

Which of the following description is wrong about the MAC address spoofing attack?

VRRP priority cannot be set to 0, so the device which send VRRP packets of priority 0 will stop adding VRRP backup group, and inform the backup device immediately become a Master device, without waiting for Master_Down_Interval timer expires.