下列读取PING一次网关的配置正确的命令是（）
- Afor /f "tokens=13" %%I in ('find "Default Gateway" ipconfig.txt') do set GatewayIP=%%I
- Bipconfig /all>ipconfig.txt
- Ccscript %windir%\system32\inetsrv\fcgiconfig.js -add -section:"PHP" ^-extension:php -path:"C:\PHP\php-cgi.exe
- Dping %GatewayIP% -n 1>nul