An MSR router needs to learn routing information through RIP, and the following configuration is made on the router: rip 1 network 0.0.0.0 Then the correct explanation for this configuration is ______.

The two MSR routers MSR-1 and MSR-2 are interconnected back-to-back through their S1/0 interfaces, and their GigabitEthernet0/0 interfaces are respectively connected to the client hosts HostA and HostB: HostA----GE0/0--MSR-1 --S1/0---------S1/0--MSR-2--GE0/0----HostB
By configuring the IP address and routing, HostA can communicate with HostB in the current network. Now the following ACL configuration is added to the router MSR-1:
acl number 3000
rule 0 deny icmp icmp-type echo
interface GigabitEthernet0/0
ip address 192.168.0.1 255.255.255.0
firewall packet-filter 3000 inbound
So which of the following statements are correct? (Multiple choice questions)

Among the STP port states listed below, which are unstable intermediate states? (multiple choice)

The interface information of a router is displayed as follows:
Serial0/0 current state: UP
Line protocol current state: DOWN
Physical layer is synchronous, Baudrate is 64000 bps
Interface is DCE, Cable type is V35, Clock mode is DCECLK
What kind of protocol may be encapsulated or run on this interface?

Which of the following statements about optical fiber are correct? (multiple choice)