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[求助]问个七号信令的题目 [复制链接]

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发表于 2008-2-25 16:32:00 |只看该作者 |倒序浏览

<p class="4" style="MARGIN: 8pt 0cm 8pt 3cm; TEXT-INDENT: 0cm;"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体;">七号信令中，请按由高至低的优先级顺序，写出基本差错控制方法时发送信令单元的优先级顺序 <span lang="EN-US"><span style="mso-spacerun: yes;">     </span><span style="mso-spacerun: yes;"> </span></span>：<span lang="EN-US"><p></p></span></span></p><p class="MsoNormal" style="MARGIN: 4pt 0cm 4pt 103.05pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo2; tab-stops: list 103.05pt;"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体;"><span style="mso-list: Ignore;">A、</span></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体;">标志码<span lang="EN-US"><span style="mso-spacerun: yes;">      </span><p></p></span></span></p><p class="MsoNormal" style="MARGIN: 4pt 0cm 4pt 103.05pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo2; tab-stops: list 103.05pt;"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体;"><span style="mso-list: Ignore;">B、</span></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体;">新的消息信令单元<span lang="EN-US"><span style="mso-spacerun: yes;">       </span><p></p></span></span></p><p class="MsoNormal" style="MARGIN: 4pt 0cm 4pt 103.05pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo2; tab-stops: list 103.05pt;"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体;"><span style="mso-list: Ignore;">C、</span></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体;">链路状态信令单元<span lang="EN-US"><span style="mso-spacerun: yes;">      </span><p></p></span></span></p><p class="MsoNormal" style="MARGIN: 4pt 0cm 4pt 3cm;"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体;">D </span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体;">、填充信令单元<span lang="EN-US"><span style="mso-tab-count: 1;">
</span><p></p></span></span></p><p class="MsoNormal" style="MARGIN: 4pt 0cm 4pt 3cm;"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体;">E</span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体;">、未得到证实和收到负证实的消息信令单元<span lang="EN-US"><p></p></span></span></p><p class="MsoNormal" style="MARGIN: 4pt 0cm 4pt 3cm;"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体;">正确答案：<span lang="EN-US">ABCDE</span></span></p><p class="MsoNormal" style="MARGIN: 4pt 0cm 4pt 3cm;"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体;"><span lang="EN-US"></span></span></p><p class="MsoNormal" style="MARGIN: 4pt 0cm 4pt 3cm;"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体;"><span lang="EN-US">想知道这个答案对吗我怎么觉得优先级的话应该先发送未证实的消息呢？</span></span></p>

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