📄 模拟考试26.htm
字号:
value=B>B.设定系统管理员的电子邮件地址<BR> <INPUT class=radio
name=text1965 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.指明服务器运行时的用户账号，服务器进程拥有该账号的所有权限<BR> <INPUT
class=radio name=text1965 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.指定服务器 WWW 管理界面的 URL，包括虚拟目录、监听端口等信息<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>42 </TD>
<TD align=left height=212 width=607> 设置 index.html 或
default.html 为目录下默认文档的指令是__(59)__©) <BR>答： <INPUT class=radio
name=text1966 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.IndexOptions<BR> <INPUT class=radio
name=text1966 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.DirectoryIndex<BR> <INPUT class=radio
name=text1966 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.DirectoryDefault<BR> <INPUT class=radio
name=text1966 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.Indexlgnore<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>43 </TD>
<TD align=left height=212 width=607>
图为曼彻斯特编码这种编码适用的网络是___(2)___。 ©) <BR>
<CENTER><IMG border=0 src="模拟考试26.files/20048131658261.bmp">
</CENTER><BR>答： <INPUT class=radio name=text1969
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.广域网<BR> <INPUT class=radio name=text1969
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.城域网<BR> <INPUT class=radio name=text1969
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.局域网<BR> <INPUT class=radio name=text1969
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.任意网<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>44 </TD>
<TD align=left height=212 width=607> 设某编码体制的编码方法为：输入数据、( m =
1,2,… )，发送时，首先计算 bm = (aM+bm-1 ) MOD 2，发送的编码为 Cm =
bm-bm-1。收到的编码为Cm，其译码方法可表示为___(5)___。©) <BR>答： <INPUT class=radio
name=text1971 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio value=A>A.
C+Cm-1<BR> <INPUT class=radio name=text1971
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.Cm-Cm-1<BR> <INPUT class=radio name=text1971
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio value=C>C.
Cm MOD 2<BR> <INPUT class=radio name=text1971
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.(Cm-Cm-1)MoD 2<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>45 </TD>
<TD align=left height=212 width=607> 元是信元交换的单位。为控制差错，在信元中包括
CRC 校验和，校验和对___(7)___进行校验。 ©) <BR>答： <INPUT class=radio
name=text1973 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.整个信元<BR> <INPUT class=radio name=text1973
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.信元头<BR> <INPUT class=radio name=text1973
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.信元载荷(用户数据)<BR> <INPUT class=radio
name=text1973 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.信元的地址域<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>46 </TD>
<TD align=left height=212 width=607>
信元交换过程中出现拥塞，该信息被记录在信元的___(10)___中。 ©) <BR>答： <INPUT class=radio
name=text1976 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio value=A>A.
GPC<BR> <INPUT class=radio name=text1976
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio value=B>B.
VPI<BR> <INPUT class=radio name=text1976
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.CLP <BR> <INPUT class=radio name=text1976
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.PT<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>47 </TD>
<TD align=left height=212 width=607> 当数据发送完毕，计算机向 MODEM
发送的信号是清除___(13)___©) <BR>答： <INPUT class=radio name=text1979
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio value=A>A.
'DTE就绪'<BR> <INPUT class=radio name=text1979
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.'请求发送'<BR> <INPUT class=radio name=text1979
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.'MODEM就绪'<BR> <INPUT class=radio
name=text1979 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.'允许发送'<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>48 </TD>
<TD align=left height=212 width=607> 计算机向 MODEM 发送的信号后MODEM
随后向计算机发送清除___(14)___信号作为应答。 ©) <BR>答： <INPUT class=radio
name=text1980 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio value=A>A.
'DTE就绪'<BR> <INPUT class=radio name=text1980
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.'请求发送'<BR> <INPUT class=radio name=text1980
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.'MODEM就绪'<BR> <INPUT class=radio
name=text1980 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio value=D>D.
'允许发送'<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>49 </TD>
<TD align=left height=212 width=607> 当使用 RS-232
通信时，通常需要使用速率匹配功能，完成该功能的协议是___(15)___。©) <BR>答： <INPUT class=radio
name=text1981 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.TELNET<BR> <INPUT class=radio name=text1981
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio value=B>B.
XON/XOFF<BR> <INPUT class=radio name=text1981
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.KERMIT<BR> <INPUT class=radio name=text1981
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.XMODEM<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>50 </TD>
<TD align=left height=212 width=607> 对一路信号进行 FSK 调制时，若载波频率为
fc , 调制后的信号频率分别为 f1 和 f2 (f1<F2)，当对多路信号进行调制时，调制后各信号的频谱___(17)___。 <br
©)> 答： <INPUT class=radio name=text1983
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.相同<BR> <INPUT class=radio name=text1983
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.部分重叠<BR> <INPUT class=radio name=text1983
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.连续<BR> <INPUT class=radio name=text1983
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.不重叠且不连续<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>51 </TD>
<TD align=left height=212 width=607> 对一路信号进行 FSK
调制时信号到达接收端后通过___(18)___分离各路信号。 ©) <BR>答： <INPUT class=radio
name=text1984 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.解调器<BR> <INPUT class=radio name=text1984
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.带通滤波器<BR> <INPUT class=radio name=text1984
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.载波发生器<BR> <INPUT class=radio name=text1984
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.终端软件<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>52 </TD>
<TD align=left height=212 width=607> WDM 与 FDM 工作方式相似， WDM
调制的是___(19)___。©) <BR>答： <INPUT class=radio name=text1985
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.时间<BR> <INPUT class=radio name=text1985
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.频率<BR> <INPUT class=radio name=text1985
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.波长<BR> <INPUT class=radio name=text1985
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.相位<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>53 </TD>
<TD align=left height=212 width=607>
网络协议是计算机网络和分布系统中互相通信的___(21)___间交换信息时必须遵守的规则的集合。©) <BR>答： <INPUT
class=radio name=text1987 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.相邻层实体<BR> <INPUT class=radio name=text1987
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.同等层实体<BR> <INPUT class=radio name=text1987
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.同一层实体<BR> <INPUT class=radio name=text1987
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.不同层实体<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>54 </TD>
<TD align=left height=212 width=607> 路由信息协议 RIP 是内部网关协议 IGP
中使用得最广泛的一种基于___(25)___的协议©) <BR>答： <INPUT class=radio name=text1991
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.链路状态路由算法<BR> <INPUT class=radio
name=text1991 onblur="this.className⌨️ 快捷键说明
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