According to the definition of the OSI seven-layer reference model, _____ is responsible for providing flow control, checking the correctness of data transmission, and providing support for multiple upper-layer protocols. (Multiple choice)

The Serial 0/0 and Serial 0/1 interfaces of the router of the Shenzhen branch of XYZ company are connected to two different ISPs through two WAN lines, and through these two ISPs, you can visit the website of the Beijing head office at 202.102.100.2, in Shenzhen. The following static routes are configured on the router of the branch office:
ip route-static 202.102.100.2 24 Serial 0/0 preference 10
ip route-static 202.102.100.2 24 Serial 0/1 preference 100
So which of the descriptions of these two routes is correct? (multiple choice)

The IP address 10.0.10.63 and the mask 255.255.255.224 represent a ______.

The WAN link between the only two routers MSR-1 and MSR-2 in the customer network adopts the PPP protocol, and the two ends learn each other's routes by configuring RIP. Currently, the route learning is normal, and now it is in the RIP of MSR-1. The following commands are added to the configuration:
[MSR-1-rip-1] silent-interface all
So ______ . (Multiple choice)

The customer's network connection looks like:
HostA------MSR-1------MSR-2--------MSR-3------HostB
The IP address configuration has been completed on all devices. To realize that HostA can access HostB, which of the following statements is correct regarding routing configuration? (multiple choice)