To configure Trunk on the link between Ethernet switches and allow the transmission of VLAN 10 and VLAN 20 information, you must configure ______ on the switch.

Two MSR routers MSR-1 and MSR-2 are connected through the WAN and dynamically complete remote route learning through RIPv2.
After stable for 2 minutes, the RIP update message from MSR-2 is received on MSR-1, which contains the route with Cost of 14, then ______. (Multiple choice)

The customer's network connection looks like:
HostA----GE0/0--MSR-1--S1/0-----WAN-----S1/0--MSR-2--GE0/0----HostB
It is known that the IP address of GE0/0 of MSR-2 is 2.2.2.1/24. The network is currently operating normally, and the hosts HostA and HostB on both sides can communicate with each other. Now the following routing is configured on MSR-2:
ip route-static 2.2.2.1 24 NULL 0
So ______ . (Multiple choice)

It is required to set a subnet mask to divide a class B network 172.16.0.0 into seven subnets, and each subnet should contain as many hosts as possible, so the subnet mask should be _____. (Dotted decimal format) slightly

The main link of the WAN of a company's MSR router is a synchronous and asynchronous serial port, which is connected to the operator's network through a V.35 cable; the router also uses an ISDN BRI interface as a backup link.
Regarding the line bandwidth, which of the following statements are correct? (multiple choice)