【单选题】【消耗次数：1】
防火墙为电子商务系统提供安全保障，下列不属于其提供安全保障的是（）。
①
保障关键部门不受到来自内部或者外部的攻击
②
确保所有电子商务应用都是授权访问，为通过Internet与远程访问的雇员、客户、供应商提供安全通道
③
保障财务部门的电脑不被他人搬走或者损坏D
④
保证电子商务系统平台不受到入侵
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