Basic principles of switches

The basic principle and configuration of the switch:
1. Draw a picture to illustrate the format of the Ethernet frame?
Answer:
2. Draw a picture to illustrate the standard format of the MAC address?
Answer:
3. What is the length range of a standard Ethernet frame?
Answer: 72~1500
4. Use the table to compare the functions and entry methods of the four command line modes of Cisco switches?
Answer: User mode: In this mode, users are greatly restricted and can only view some statistical information.
Privileged mode: In this mode, users can view and modify the configuration of Cisco devices.
Global configuration mode: In this mode, users can modify the switch Global configuration
interface mode: different from the global mode, the configuration made by the user in this mode is set for the f0/1 interface
5. Briefly describe the working principle of the switch?
Answer: The switch learns the MAC address table according to the source MAC address of the port, and decides how to forward the data frame according to the destination MAC address of the data frame. If it is available, it will be unicast, if not, it will be broadcast
. 6. Currently in user mode, which commands can be executed in sequence Change the hostname of the switch to switch?
Answer:
7. What are the methods to return to privileged mode from global mode or interface mode?
Answer: You need to enter the disable command. No matter which mode you are in, you can return to the previous mode by entering the "exit" command. In the global mode or interface mode, you can return to the privileged mode by entering the "end" command.
8. On the Cisco switch What command can be executed sequentially to enter the interface mode of f0/1 from user mode?
Answer: Enble
Config terminal
Interface fastethernet0/1
9. The switch prompt is "sw1(config-if)#", what command can be executed in order to view the system IOS name and version information?
Answer: do show version
10. When you execute the show mac-address-table dynamic command on the Cisco switch, what information can be obtained? The MAC address table is equivalent to a database inside the switch, which records the correspondence between the MAC address and the interface number.
Answer: You can see the correspondence between the MAC address and the interface number.