There are many kinds of WAN interfaces. Which of the following descriptions of WAN interfaces is correct is ______. (Multiple choice)

When viewing the configuration, if there are many configuration commands and one screen cannot be displayed completely, after displaying one screen, you can press ___ to display the next page.

The correct sequence of the steps in the startup process of detecting the router system is _________. (Fill in the code of each step one by one, there can be no spaces in between, such as: ABCD)

If you want to check which VLANs currently exist on the switch, which one of the following commands is required?

On the MSR router, each functional module has its corresponding information display command. Generally, to view the operating information of each functional module, you need to run the corresponding display commands one by one. In order to collect more information at one time and facilitate daily maintenance or problem location, you can execute the ______ command in any view to display the current statistical information of the main functional modules of the system.