[求助]CCNA学习指南(中文第五版)中的一道题

山涧清泉

<P><FONT face=宋体 size=3>&nbsp;(书P44/18)How does a host on an Ethernet LAN know when to transmit after a collision has occurred?</FONT></P><P><FONT face=宋体 size=3>&nbsp; A.The destination host sends a request to the source for retransmission</FONT></P><P><FONT face=宋体 size=3>&nbsp; B.The jam signal indicates that the collision has been cleared</FONT></P><P><FONT face=宋体 size=3>&nbsp; C.The hosts will attempt to resume transmission after a time delay has expried</FONT></P><P><FONT face=宋体 size=3>&nbsp; D.An electric pulse indicates that the collision has cleared</FONT></P><P><FONT face=宋体 size=3>&nbsp; E.The router on the segment will signal that the collision has cleared</FONT></P><P><FONT face=宋体 size=3>(课后参考答案选的是G呀!很明显没有G这个选项呀!应该要选那个呢?)</FONT></P>

头点什么

<FONT color=#2222dd>应该是C，时间延迟到期之后，再恢复传输。</FONT>