单项选择题
A.星型拓扑 B.总线型拓扑
A.CSMA B.TCP/IP C.x.25 D.CSMA/CD
A.19-22-01-63-23 B.192.201.63.252 C.0000.1234.ADFG D.00-00-11-11-11-AA
A.02:50:2E:9B:CA B.02:50:2E:9B:CA:AF C.02:50:2E:9B:CA:AG D.02:50:2E:9B:CA:#1
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