步骤 1：设置测试环境
1 创建测试环境
- 打开命令提示符（Windows）或命令行界面（macOS，Linux）。
- 输入以下命令创建一个测试目录：
mkdir test
- 创建一个测试文件夹：
mkdir test
2 创建测试环境
- 使用以下命令创建一个测试环境：
mkdir test
- 创建一个测试文件夹：
mkdir test
3 创建测试设备
- 使用以下命令创建路由器和交换机：
echo 'create router name 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