[求助]大家帮我看看这题

sod

<BR><P>Which statements are true regarding ISDN channels? Select three<BR>A. Each B channel can transmit up to 64 kbps<BR>B. The ISDN B channel carries voice or data<BR>C. the ISDN B channel transmits control information.<BR>D. The D channel transmission rate varies depending on the service used.<BR>E. HDLC or PPP can be used to encapsulate D channel information.<BR>Answer: A, B, D</P><P>我在另一个地方看到答案是abe<IMG src="images/Emotions/18.gif"></P>

我要飞

<P>我觉得应该ABD没错<IMG src="http://www.spoto.net/bbs/images/Emotions/3.gif"></P><P>D通道能封么？！</P>

sod

<P>3Q!</P>

sky

<P>Which statements are true regarding ISDN channels? Select three<BR>A. Each B channel can transmit up to 64 kbps<BR>B. The ISDN B channel carries voice or data<BR>C. the ISDN B channel transmits control information.<BR>D. The D channel transmission rate varies depending on the service used.<BR>E. HDLC or PPP can be used to encapsulate D channel information.<BR>Answer: A, B, D</P><P>the answer is right, </P><P>D channel rate for BRI is 16 kps (max)<BR>D channel rate for PRI is 64 kps (max)<BR>but it&nbsp;may be lesser&nbsp;&nbsp;base on service provice.</P><P><IMG src="http://spoto.net/bbs/images/Emotions/72.gif"></P><P>Which interface commands would you enter on a Catalyst 2900 switch, if your goal<BR>was to bring all VLAN traffic to another directly connected switch? (Select the two<BR>valid responses)<BR>A. Switch(config-if)# vlan all<BR>B. Switch(config-if)# switchport trunk encapsulation dot1q<BR>C. Switch(config-if)# switchport access vlan all<BR>D. Switch(config-if)# switchport mode trunk<BR>E. Switch(config-if)# switchport access vlan 303<BR>Answer: B, D</P><P>the answer is wrong.&nbsp; C,D is correct</P><P>&nbsp;<IMG src="http://spoto.net/bbs/images/Emotions/48.gif"><IMG src="http://spoto.net/bbs/images/Emotions/9.gif"></P><p>［此帖子已被 sky 在 2005-5-20 9:12:14 编辑过］

sod

<P>谢谢两位前辈<IMG src="http://www.spoto.net/bbs/images/Emotions/16.gif"></P><P>我会以你们为目标，努力学NP的，呵呵<IMG src="http://www.spoto.net/bbs/images/Emotions/4.gif"></P>

sky

<P>不客气哦.呵呵，加油.</P><P>SPOTO论坛本来就是给大家讨论问题的地方不是?</P>