为什么一个四级防火墙(一个能够看看所有礼宾负责人到运输层的装置)不能阻挡所有国际CMP的交通?
ICMP是一个IP层面议定书。 为什么我们会利用四级防火墙阻止所有国际CMP的交通。 不能通过阻挡IPresses和港口号来做到这一点?
为阻止该《议定书》,将以下编号列入ICMP 。
港口号是4个接收器,国际CMP是3个接收器。
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