The XYZ company administrator is subnetting the office network. It is required to divide a class B network segment into several subnets of equal size for office users in various departments, but there is no limit to the size of the subnets. There can be ___ kinds of division methods. (Please fill in Arabic numerals)

Which of the following protocols may run between a frame relay DTE device and a frame relay switch?

According to the needs of users, the administrator needs to create a new VLAN on the switch SWA, and the VLAN needs to include the port Ethernet1/0/2.
According to the above requirements, which of the following commands need to be configured on the switch?

If all 0 and all 1 subnets can be used as effective subnets, the class C address 192.168.1.0 is subnetted with a 26-bit subnet mask, and the number of effective subnets that can be divided is ______.

The PC is connected to the port E1/0/2 of the switch SWA, the IP address is 10.1.1.1, and the MAC address is 00-01-02-01-21-23. To ensure network security, you need to configure MAC+IP+ port binding on port E1/0/2.
Which of the following commands is correct?