On a half-duplex Ethernet LAN, two hosts attempt to send data simultaneously, resulting in a collision. Following this collision, what will the hosts do? (Select all valid answers)

A． The destination host sends a request to the source for retransmission.

B． The jam signal indicates that the collision has been cleared.

C． The hosts will attempt to resume transmission after a time delay has expired.

D． An electrical pulse indicates that the collision has cleared.

E． The router on the segment will signal that the collision has cleared.

F． The hosts will do nothing, as the higher layers are responsible for data error correction and re-transmission.

[名词解释] half-duplex trsansmission半双工传输

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[单选题]In the Ethernet LAN，an algorithm was chosen to dynarnically adapt to the number of stations trying to senD．It is called (71) ．(71) A．backward learningB．binary exponential backoffC．spanning treeD．CRC

[单选题]In the Ethernet LAN, an algorithm was chosen to dynamically adapt to the number of stations trying to send. It is caned(71).A．backward learningB．binary exponential backoffC．spaanning treeD．CRC

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[单选题] 10BaseT is an Ethernet LAN term meaning a maximum transfer rate of 10Mbps that uses baseband signaling and twisted pair cabling. A 10BaseT Ethernet LAN has a （71） topology.（71）A．starB．ringC．busD．none of the above

[单选题] 在关于①Ethernet ②Token Bus ③ATM LAN ④FDDI ⑤Token Ring 的组合中，属于共享介质局域网的是（9） 。（9）A．①②③④B．①②④⑤C．②③④⑤D．①③④⑤

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[单选题]lan O'Sullivan, CFA, is the owner and sole employee of two companies, a pub