ahaha 发表于 2003-10-27 21:27:48

question

According to the IEEE 802.3 CSMA/CD specification, which is proper signal for contact 6 of a PHY<br>without an internal crossover MDI Signal?<br>A. Receive +<br>B. Transmit +<br>C. Receive –<br>D. Transmit –

ahaha 发表于 2003-10-27 22:46:47

问题在于without an internal crossover MDI Signal?这是什么意思<br>

westwindy 发表于 2003-10-30 12:34:48

就是不用级联口(交叉)嘛<br>这就是上面贴图中的情况了呗<br>哈<br>我猜的

chinamoon 发表于 2003-10-27 22:34:02

去看看综合布线吧。第6针是如何用的。

飞猴 发表于 2003-10-27 22:38:08

我有做到一题类似的，AHAHA这不是NA的题吧？<br>胡大顺便讲解一下，就是TX和RX两条线～<br>

chinamoon 发表于 2003-10-27 22:39:08

<BLOCKQUOTE><strong>引用</strong>：<HR Size=1>原文由 <b>ahaha</b> 发表:<br>According to the IEEE 802.3 CSMA/CD specification, which is proper signal for contact 6 of a PHY<br>without an internal crossover MDI Signal?<br>A. Receive +<br>B. Transmit +<br>C. Receive –<br>D. Transmit –<HR SIZE=1></BLOCKQUOTE><br><img border=0 src=http://www.spoto.net/bbs/images/upfile/2003102722393.gif onload="javascript:if(this.width>screen.width-300)this.width=screen.width-300">
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