The routing policy tools that can be used by BGP mainly include Filter-policy and Route-policy. Fiter-policy can only filter routes, and Route-policy can only modify routes.

There are multiple types of MAC address entries on the switch. Which of the following types of entries can discard messages by matching the source MAC address of the received message, thereby achieving the purpose of filtering out illegal users.

As shown in the figure, an enterprise hopes to achieve secure mutual visits between the headquarters and branches, as well as business isolation between the R&D area and the non- R&D area without changing the network deployment.

To meet this requirement, the administrator deploys BGP/MPLS IP VPN in the network. Which of the following descriptions of this scenario are correct? (Multiple choice)

Large and midsize enterprise networks can be divided into the access layer, aggregation layer, and core layer. Network engineers need to work out a migration solution for the operations to be performed at any layer, as long as the operations affect services on the live network.

Which of the following community attributes can ensure that the propagation scope of BGP routing entries is only within the AS?