As shown in the figure, all routers run OSPF. Which of the following statements is correct?

When configuring source NAT with no-pat configuration parameters, which of the following statements is correct?

BGP 4+ runs between the two routers. The neighbor relationship is normal. However, the BGP routing table of the local router does not have neighbor's routing entry. What is the possible reason? (Multiple Choice)

The Level-1-2 IS will send Level-2 LSPs to the level-1 IS Level-1 area in the domain. If the ATT position in the Level-2 LSP is 1, it means the area Access to the external area through level-1-2 IS.

VXLAN uses BGP EVPN to establish a tunnel. What kind of packets are used?