As shown in the picture, PC1 and RTA establish connection through ISATAP tunnel, RTA and RTB establish 6to4 tunnel, all configurations are correct. If PC1 obtains the IPv6 address correctly, then send out the message whose destination address is PC2 (2002:201:2:2009::2). Then the IPv4 destination address encapsulated in the message sent from PC1 is ______; and the IPv4 source address encapsulated in the message sent from RTA is ______.

In the topology shown in the figure, the following configurations are performed on RTA and RTB respectively:
RTA-ospf-1-area-0.0.0.1]network 192.168.0.0 0.0.0.255
RTA-ospf-1-area-0.0.0.1]network 192.168.1.0 0.0.0.255
RTA-ospf-1-area-0.0.0.1]network 192.168.2.0 0.0.0.255
RTA-ospf-1-area-0.0.0.1]network 192.168.3.0 0.0.0.255
RTA-ospf-1-area-0.0.0.1]network 192.168.4.0 0.0.0.255 Now it is required that the RTC cannot learn the routes configured in the above RTA, what configuration can be performed on the router?

In the network shown in the figure, RTA, RTB, RTC, RTD are in the same AS, and the IBGP connection as shown in the figure is established.

Which of the following statements about BGP reflector settings is true?

In the following statement about PBR (polic-based-route, policy-based routing) load balancing application, the wrong one is ______________.

The DD (Database Description) message in the OSPF protocol has the function of ______.