📄 模拟考试21.htm
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onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.向除该端口以外的桥的所有端口转发此帧<BR> <INPUT class=radio
name=text1671 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.向桥的所有端口转发此帧<BR> <INPUT class=radio
name=text1671 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.仅向该端口转发此帧<BR> <INPUT class=radio
name=text1671 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.不转发此帧，而由桥保存起来<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>42 </TD>
<TD align=left height=212 width=607> 图一为两个局域网 LAN1 和 LAN2
通过网桥 1 和网桥 2 互连后形成的网络结构。设站 A
发送一个帧，但其目的地址均不在这两个网桥的地址转发表中，这样结果会是该帧__(18)__。©) <BR>
<CENTER><IMG border=0 src="模拟考试21.files/200481394246wso3x8.gif">
</CENTER><BR>答： <INPUT class=radio name=text1675
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio value=A>A.经桥
1（或桥 2）后被站 B 接收<BR> <INPUT class=radio name=text1675
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio value=B>B.被桥
1（或桥 2 ）丢弃<BR> <INPUT class=radio name=text1675
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.在整个网络中无限次地循环下去<BR> <INPUT class=radio
name=text1675 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio value=D>D.经桥
1 ( 或桥 2 ）到达 LAN2，再经桥 2 ( 或桥 1 ）返回 LAN1 后被站 A 吸收<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>43 </TD>
<TD align=left height=212 width=607> 在使用路由器 R 的 TCP/IP
网络中，两主机通过一路由器互联，提供机器之间通信的层是__(22)__©) <BR>答： <INPUT class=radio
name=text1688 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.应用层<BR> <INPUT class=radio name=text1688
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.传输层<BR> <INPUT class=radio name=text1688
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio value=C>C.
IP层<BR> <INPUT class=radio name=text1688
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.网络接口层<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>44 </TD>
<TD align=left height=212 width=607> 对照 ISO/OSI
参考模型各个层中的网络安全服务，在网络层可以采用__(28)__来处理信息内外网络边界流动和建立透明的安全加密信道©) <BR>答：
<INPUT class=radio name=text1697 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.防窃听技<BR> <INPUT class=radio name=text1697
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.防火墙技术<BR> <INPUT class=radio name=text1697
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.防病毒技术<BR> <INPUT class=radio name=text1697
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.防拒认技术<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>45 </TD>
<TD align=left height=212 width=607> 对照 ISO/OSI
参考模型各个层中的网络安全服务，为了将低层安全服务进行抽象和屏蔽，最有效的一类做法是可以在传输层和应用层之间建立中间件层次实现通用的安全服务功能，通过定义统一的安全服务接口向应用层提供__(30)__安全服务。©)
<BR>答： <INPUT class=radio name=text1701
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.身份认证<BR> <INPUT class=radio name=text1701
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.访问控制 <BR> <INPUT class=radio name=text1701
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.身份认证、访问控制和数据加密<BR> <INPUT class=radio
name=text1701 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.数据加密<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>46 </TD>
<TD align=left height=212 width=607> TCP
是一个面向连接的协议，为了提高效率，又引入了滑动窗口协议，协议规定重传__(33)__的分组©) <BR>答： <INPUT
class=radio name=text1708 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.未被确认及至窗口首端的所有分<BR> <INPUT class=radio
name=text1708 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.未被确认<BR> <INPUT class=radio name=text1708
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.未被确认及至退回N值的所有分组<BR> <INPUT class=radio
name=text1708 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.仅丢失的<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>47 </TD>
<TD align=left height=212 width=607> TCP
是一个面向连接的协议，为了提高效率，又引入了滑动窗口协议，这种分组的数量最多可以__(34)__©) <BR>答： <INPUT
class=radio name=text1710 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.是任意的<BR> <INPUT class=radio name=text1710
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.1个<BR> <INPUT class=radio name=text1710
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.大于滑动窗口的大小<BR> <INPUT class=radio
name=text1710 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.等于滑动窗口的大小<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>48 </TD>
<TD align=left height=212 width=607> TCP
是一个面向连接的协议，为了提高效率，又引入了滑动窗口协议，TCP协议采用滑动窗口协议解决了__(35)__。 ©) <BR>答：
<INPUT class=radio name=text1712 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.端到端的流量控制<BR> <INPUT class=radio
name=text1712 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.整个网络的拥塞控制<BR> <INPUT class=radio
name=text1712 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.端到端的流量控制和网络的拥塞控制<BR> <INPUT class=radio
name=text1712 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.整个网络的差错控制 <BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>49 </TD>
<TD align=left height=212 width=607> SNMP
协议管理操作中管理代理主动向管理进程报告事件的操作是__(38)__。©) <BR>答： <INPUT class=radio
name=text1715 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.get-request<BR> <INPUT class=radio
name=text1715 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.get-response<BR> <INPUT class=radio
name=text1715 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.trap<BR> <INPUT class=radio name=text1715
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.set-request<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>50 </TD>
<TD align=left height=212 width=607> CMOT
是要在__(40)__上实现公共管理信息服务协议（CMIS）的服务，它是一个过渡性的解决方案，希望过渡到 OSI 网络管理协议被广泛采用。 ©)
<BR>答： <INPUT class=radio name=text1719
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.TCP/IP 协议族<BR> <INPUT class=radio
name=text1719 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.X.25 协议族<BR> <INPUT class=radio
name=text1719 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.帧中继协议族<BR> <INPUT class=radio name=text1719
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.ATM 协议族<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>51 </TD>
<TD align=left height=212 width=607>
N-ISDN一路话音占用的数据传输率是__(44)__©) <BR>答： <INPUT class=radio
name=text1726 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.3KHz<BR> <INPUT class=radio name=text1726
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.3.4KHz<BR> <INPUT class=radio name=text1726
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.64Kbps<BR> <INPUT class=radio name=text1726
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.128Kbps <BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>52 </TD>
<TD align=left height=212 width=607> 当计算机需要通过相连的 MORDEM
发送数据时，依次设置的信号是__(50)__。©) <BR>答： <INPUT class=radio name=text1957
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.MODEM就绪→
DTE就绪→请求发送→允许发送→发数据→清请求发送→清允许发送→清MODEM就绪→清DTE就绪<BR>
<INPUT class=radio name=text1957 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.MODEM就绪→DTE就绪→请求发送→允许发送→发数据→清请求发送→清允许发送→清DTE就绪→清MODEM就绪<BR>
<INPUT class=radio name=text1957
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.DTE就绪→MODEM就绪→请求发送→允许发送→发数据→清请求发送→清允许发送→清MODEM就绪→清DTE就绪<BR>
<INPUT class=radio name=text1957
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.DTE就绪→MODEM就绪→请求发送→允许发送→发数据→清请求发送→清允许发送→清DTE就绪→清MODEM就绪<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>53 </TD>
<TD align=left height=212 width=607> 当进行 VP 交换时，VPI 和 VCI
的变化情况是__(53)__。©) <BR>答： <INPUT class=radio name=text1960
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.VPI变化，VCI不变<BR> <INPUT class=radio
name=text1960 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.VPI不变，VCI变化<BR> <INPUT class=radio
name=text1960 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.VPI变化，VCI变化<BR> &nbs⌨️ 快捷键说明
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