The role of link aggregation is ______.

A PC is connected to the port E1/0/1 of the switch SWA. If you want the switch to perform local authentication on the PC through the 802.1X protocol, which commands need to be configured on the switch? (multiple choice)

Which of the following statements about CSMA/CD is correct is ______. (Multiple choice)

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)