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

On the MSR router, type the first few letters of a keyword of the command and press ______ to complete the command.

The customer's network connection looks like:
HostA----GE0/0--MSR-1--S1/0-----WAN----S1/0--MSR-2--GE0/0----HostB
On the WAN interface S1/0 of the two routers MSR-1 and MSR-2, only the PPP protocol is encapsulated and the IP address is configured. Currently, HostA and HostB can ping each other. Add the command ppp authentication-mode chap under MSR-1 interface S1/0, and then execute shutdown and undo shutdown operations on S1/0 of MSR-1.
So ______ . (Multiple choice)

The WAN link between the two routers MSR-1 and MSR-2 uses the PPP protocol, and RIP is configured on the two routers to advertise routing information to each other. At present, you can see the RIP routes advertised by MSR-2 on MSR-1, but you can't see any RIP routes in the routing table of MSR-2. The possible reason is ______. (Multiple choice)

Which of the following statements about IP addresses are correct is ______. (Multiple choice)