As shown in the following figure, what routes can R2 learn?

The SWA and SWB are connected by two physical Ethernet links.
The SWA has the following interface configurations:
[SWA]interface GigabitEthernet 1/0/1
[SWA-GigabitEthernet 1/0/1] port link-type trunk
[SWA-GigabitEthernet 1/0/1] port trunk allow-pass vlan 1 0 100
[SWA]interface GigabitEthernet 1/0/2
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[SWA-GigabitEthernet 1/0/2] port link-type trunk
[SWA-GigabitEthernet 1/0/2] port trunk allow-pass vlan 1 10
These two links are aggregated
Assume that the configuration on the SMB is correct.
Which of the following statements are correct in view of this information? (Multiple Choice)

You want to set the DSCP value of VoIP traffic in HW network equipment to EF.
According to the differentiated services model RFC, the flow mark EF should be set as _____.

In an MPLS BGP VPN network that does not enable the MPLS penultimate hop pop-up technology, when the message reaches the last hop PE, the message has two layers of labels, and the two layers of label values can be the same.

Regarding the difference between NSR and NSF, which one is correct?