If the sticky MA, C function is enabled on an interface, by default, the number of MA, C addresses learned by the interface is as large as few?

Which of the following BGP routing attributes cannot control BGP route selection?

OSPFv2 is an IGP running on an IPv4 network; OSPFv3 is an IGP running on an IPv6 network. The basic working mechanism of OSPFv3 is the same as OSPFv2, such as the election of DR and BDR. As shown in the figure, an engineer uses three routers to test IPv6 services. He wants to realize the interconnection and interoperability of IPv6 networks by running OSPFv3.

Which of the following statements regarding the election of DR on this network is correct?

EGP authentication can prevent illegal routers from establishing neighbors with B, CP routers. B, CP authentication can be divided into MD5 Authentication and Keychain authentication, which of the following BGP documents will carry the B, CGP Keychain authentication letter interest? (header carry)

The rollback operation of project cutover can be temporarily determined according to the situation during cutover, and no advance plan is required.