比如
http://www.newegg.com/Product/Product.aspx?Item=N82E16833704200&cm_re=power_line_networking_adapter-_-33-704-200-_-Product
http://www.newegg.com/Product/Product.aspx?Item=N82E16833181529&cm_re=power_line_networking_adapter-_-33-181-529-_-Product
一头接router,另一头接各种设备,包括Wifi Access Point