On the MSR router, use the ______ command to view the router's NAT aging time.

You can see the following information on the router MSR-1:
[MSR-1]display acl 3000
Advanced ACL 3000, named -none-, 2 rules,
ACL's step is 5
rule 0 permit ip source 192.168.1.0 0.0.0.255
rule 10 deny ip (19 times matched)
The ACL 3000 has been applied to the correct interface and direction.
From this we can know _______. (Multiple choice)

The PC is connected to the port E1/0/2 of the switch SWA, the IP address is 10.1.1.1, and the MAC address is 00-01-02-01-21-23. To ensure network security, you need to configure MAC+IP+ port binding on port E1/0/2.
Which of the following commands is correct?

In the network environment as shown in the figure, two routers are connected back to back by serial ports, and the rate of the interconnection link should be set to 2Mbps. The correct statement below is ______.

Three MSR routers are connected in the same LAN network, as shown in the figure. Run OSPF on the LAN interconnection network segment of the three routers, and the DR priorities of RTA, RTB, and RTC are 2, 2, and 3 respectively.

Due to the failure of the RTC LAN link, only RTA and RTB are currently working normally, and the OSPF neighbor status between RTA and RTB is stable. So _____ . (Multiple choice)