Which of the following descriptions about virtual switches is correct? (Multiple choice)

Which of the following descriptions about virtual switches is correct? (Multiple choice)
A . A virtual switch is a network platform that is simulated through software and has the functions of a physical switch system.
B . The virtual switch provides network connectivity between the virtual machine and the external network
C . It is recommended to create independent management, storage and business virtual machines and divide them into different vlans
D . The management virtual switch carries important messages such as management messages and virtual machine migration messages.

Answer: ABCD