The command to configure a silent interface on a router so that the router does not send OSPF protocol packets is _______.

Execute the displaospf vlink command on the MSR router RTA, the router output is as follows:
OSPF Process 100 with Router ID 3.3.3.3
Virtual Links
Virtual-link Neighbor-ID -> 2.2.2.2, Neighbor-State: Full
Interface: 20.0.0.1 (GigabitEthernet0/1)
Cost: 1 State: P-2-P Tpe: Virtual
Transit Area: 0.0.0.1
Timers: Hello 10, Dead 40, Retransmit 5, Transmit Dela1
Judging from the above output _______.

The command to configure manual route aggregation of RIP protocol on MSR router is ___________.

In the IS-IS network shown in the figure, RTA, RTC, RTD, and RTE establish Level-2 adjacency with each other; RTB, RTA, and RTC establish Level-1 adjacency. After the reasons of each router are stable, RTB selects the next hop as ______ when accessing 192.168.14.1.
If RTC adds the following configuration at this time:
RTC-isis-1] import-route isis level-2 into level-1
Then RTB selects the next hop as ______ when accessing 192.168.4.1 again.

The router uses the Router-ID to generate the NET address of the IS-IS process. The benefits are ______.