An enterprise network administrator needs to set a subnet mask to divide the Class C network 211.110.10.0 that he is responsible for into at least 10 subnets. How many subnet masks can be used for division? (multiple choice)

On the MSR router, by default, the configuration file is suffixed with ______.

Three MSR routers are connected in the same LAN network, as shown in the figure. Run OSPF on the LAN interconnection network segment of the three routers, and the DR priorities of RTA, RTB, and RTC are 2, 2, and 3 respectively.

Due to the failure of the RTC LAN link, only RTA and RTB are currently working normally, and the OSPF neighbor status between RTA and RTB is stable. So _____ . (Multiple choice)

DNS works on the ______ of the OSI reference model.

When using the ping command on the MSR router, you can use the ______ parameter to set the length of the sent ICMP packet. size