https://blog.csdn.net/qq_38265137/article/category/7126126
vlan基础知识:https://blog.csdn.net/qq_38265137/article/details/80390759
接入层、汇聚层和核心层交换机的特点:https://blog.csdn.net/Linux7985/article/details/78838132
https://blog.csdn.net/qq_38265137/article/category/7126126
vlan基础知识:https://blog.csdn.net/qq_38265137/article/details/80390759
接入层、汇聚层和核心层交换机的特点:https://blog.csdn.net/Linux7985/article/details/78838132