利用TFTP管理交换机配置,作为网络管理员，在交换机上做好配置后，需要将其配置文件做备份，以备将来需要时用； 假设某台交换机的配置文件由于误操作或其它某种原因被破坏了，现在需要从TFTP服务器上的备份配置文件中恢复。

-Using TFTP managed switch configuration, as a network administrator, and do the switch configuration, you need to do a backup of its configuration files to prepare for the future, when necessary use　assumption of a switch configuration file due to some reason or other misuse destroyed, and now need to TFTP server, restore the backup configuration file.