There is a concept of forwarding equivalence class (FEC-Fowarding Equivalence Class) in MPLS, so FEC does not Can the allocation be made based on which of the following criteria?

IS-IS is a link-state routing protocol that uses the SPF algorithm for route calculation. As shown in the figure, a campus deploys both IPv4 and IPv6 and runs IS-IS to achieve network interconnection. R2 only supports IPv4. Which of the following statements is true about the topology calculation of this network?

According to this picture, we can judge?
<Huawei>display ospf Isdb router self-originate OSPF Process 1 with Router ID 10.0.12J Area: 0.0.0.0 Type:Router Lsid: 10.0.12 J Adv rtr: 10.0.12.1 Ls age: 312 Len: 36 Options : A, BR E
\seq#:80000013
1 chksum : 0xc61c
I Link count: 1
1 * Link ID: 10.0.12.2
I Data : 10.0.12.1
, Link Type: TransNet
. Metric : 1

In the absence of a header, the Domain ID of each OSPF process running on the router and the process ID of the process Be consistent and can be modified under the process through the domain-id command

OSPF is deployed in a campus to achieve network interworking, and OSPF is also enabled on the GEO/0/2 interface of R3. Area1 is deployed as an NSSA area, and the device addresses are shown in the figure. An engineer configures a static route on R3 to access the loopback interface address of R4, and imports the static route in the 0SPF process. At this point, in the Type5 LSA received by R1, the forwarding address (FA) is____. (Note: Please fill in the IP address without mask)