Which of the following statements about optical fiber is wrong? (multiple choice)
Connect the two switches with an Ethernet cable, and the MDI type of the interconnection port is configured as across, then the Ethernet cable should be ________.
The 802.11b protocol defines 14 channels in the 2.4GHz frequency band, and there is overlap in the frequency spectrum between adjacent channels. In order to maximize the use of frequency band resources, which set of channels can be used for wireless coverage?
The Ethernet port Ethernet1/0 of the customer router MSR-1 is configured as follows:
interface Ethernet0/0
ip address 192.168.0.1 255.255.255.0
This interface is connected to a three-layer switch, and this three-layer switch is where the default gateway of the network segment 192.168.7.0/24~192.168.83.0/24 of the customer's office network is located.
Now the customer requires that an ACL be configured on the MSR-1 to prohibit all users on the office network from initiating Telnet to the address 192.168.0.1 of the MSR-1, so which of the following configurations is correct?
If the IP address of a host is 130.25.3.135 and the subnet mask is 255.255.255.192, then the network address of the subnet where the host is located is ______.
