单项选择题
A.1500bytes B.1518bytes C.1418bytes D.4500bytes
A.Tree Topology Line B.Time To Live C.Transport Topology Line D.Trunk Transport Line
A.100m B.165m C.185m D.500m
A.对称 B.伺机通过 C.存储转发 D.存储器缓冲区
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