The following statement about the upgrade of H3C network equipment is correct ______ . (Multiple choices)

The following statement about the upgrade of H3C network equipment is correct ______ . (Multiple choices)
A . Using Xmodem to upgrade can achieve the same speed as FTP
B . When using FTP to upgrade, the device can be used as an FTP server or client
C . When the device cannot be booted to the command line mode and the operating system software needs to be upgraded, Xmodem and TFTP modes can be used
D . In an environment where the client and server are not easy to interact with, you can use TFTP to upgrade

Answer: BCD

Explanation:

Xmodem upgrade speed snail