思科认证
Which of the following are true of Ethernet technology?A．Hosts use a logical ring topology.B．Hosts use a logical bus topologyC．Hosts must wait for an electronic signal to transfer data.D．Hosts are directly connected to a wiring concentrator called a MSAU.
题目
Which of the following are true of Ethernet technology?
A．Hosts use a logical ring topology.
B．Hosts use a logical bus topology
C．Hosts must wait for an electronic signal to transfer data.
D．Hosts are directly connected to a wiring concentrator called a MSAU.
E．None of the above
参考答案和解析
正确答案：B
解析：Explanation:LANtopologiesdefinethemannerinwhichnetworkdevicesareorganized.FourcommonLANtopologiesexist:bus,ring,star,andtree.Thesetopologiesarelogicalarchitectures,buttheactualdevicesneednotbephysicallyorganizedintheseconfigurations.Logicalbusandringtopologies,forexample,arecommonlyorganizedphysicallyasastar.AbustopologyisalinearLANarchitectureinwhichtransmissionsfromnetworkstationspropagatethelengthofthemediumandarereceivedbyallotherstations.OfthethreemostwidelyusedLANimplementations,Ethernet/IEEE802.3networks,including100BaseT,implementabustopology,whichisillustratedinFigure2-3.Somenetworksimplementalocalbustopology.
解析：Explanation:LANtopologiesdefinethemannerinwhichnetworkdevicesareorganized.FourcommonLANtopologiesexist:bus,ring,star,andtree.Thesetopologiesarelogicalarchitectures,buttheactualdevicesneednotbephysicallyorganizedintheseconfigurations.Logicalbusandringtopologies,forexample,arecommonlyorganizedphysicallyasastar.AbustopologyisalinearLANarchitectureinwhichtransmissionsfromnetworkstationspropagatethelengthofthemediumandarereceivedbyallotherstations.OfthethreemostwidelyusedLANimplementations,Ethernet/IEEE802.3networks,including100BaseT,implementabustopology,whichisillustratedinFigure2-3.Somenetworksimplementalocalbustopology.
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