In the OSPFv3 network shown in the figure, area 1 is a stub area, area 2 is a common area, and area 3 is an NSSA area. The IPv6 address of the R6 Loopback0 interface is 2000::6/128. The Router ID of each device is 10.0.XX, where X is the device number.

Which of the following descriptions are correct? (Multiple choice)

The LSP fast diffusion feature can speed up the diffusion of LSP. Under normal circumstances, when IS-IS receives an LSP from another router, if this LSP is newer than the corresponding LSP in the local LSDB, it updates the LSP in the LSDB and uses a timer to periodically diffuse the updated LSP in the LSDB. When a device with the LSP fast diffusion feature enabled receives one or more newer LSPs, it diffuses LSPs less than the specified number before route calculation to speed up the synchronization process of the LSDB.

On the IS-IS IPv6 network shown in the figure, multi-topology is enabled on all routers.
The IPv6 address of Loopback0 on R4 is 2000::4/128.
The command ipv6 summary 2000::/64 level-1-2 is configured in the IS-IS process of R4.

Which of the following statements is false?

In the OSPF network shown in the figure, the cost value of the link is marked in the figure. R1 has enabled OSPP IP FR and configured the "maximum load-balancing 8" command in the OSPF process. Which of the following is the cost value of reaching 10.35.0/24 in R1's routing table?

IPSG can defend against IP address spoofing attacks. Which of the following descriptions of IPSG are wrong? (Multiple choice)