A routing protocol is a link state routing protocol, then which of the following characteristics should this routing protocol have? (multiple choice)

The customer's router is connected to the operator's network through DCC, so which of the following interfaces on the router can realize DCC dial-up?

The three MSR routers RTA, RTB, and RTC are connected to the same frame relay network through their respective S1/0 interfaces. This frame relay network can provide enough PVC resources. As a network engineer, you need to assign IP addresses to these frame relay interfaces.
Which of the following statements is incorrect?

Two empty-configured MSR routers MSR-1 and MSR-2 are interconnected back-to-back through their respective S1/0 interfaces, and their respective GigabitEthernet0/0 interfaces
Connect the client hosts HostA and HostB respectively:
HostA----GE0/0--MSR-1--S1/0---------S1/0--MSR-2--GE0/0----HostB
Then make the following configuration on the two routers:
Configuration on MSR-1:
[MSR-1]interface GigabitEthernet 0/0
[MSR-1-GigabitEthernet0/0]ip add 192.168.1.1 24
[MSR-1]interface Serial 1/0
[MSR-1-Serial1/0]ip address 30.3.3.1 30
[MSR-1]rip
[MSR-1-rip-1]network 0.0.0.0
Configuration on MSR-2:
[MSR-2]interface GigabitEthernet 0/0
[MSR-2-GigabitEthernet0/0] ip address 10.10.10.1 24
[MSR-2]interface Serial 1/0
[MSR-2-Serial1/0]ip address 30.3.3.2 30
[MSR-2]rip
[MSR-2-rip-1]network 10.10.10.0
[MSR-2-rip-1]network 30.3.3.1
According to the above configuration, the WAN interface between the two routers can communicate with each other, other physical links in the network are good, and the two hosts HostA,
HostB can ping the address of their gateway GigabitEthernet0/0, so the following statement is correct _____.

A router is connected to the operator's network through the Serial1/0 interface. To configure a default route on this router to achieve the purpose of accessing the Internet, which of the following configurations must be correct and effective?