📄 模拟考试5.htm
字号:
value=C>C.0111<BR> <INPUT class=radio name=text1510
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.1111<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>3 </TD>
<TD align=left height=212 width=607>
为了进行差错控制，必须对传送的数据帧进行校验。要检查出d位错，码字之间的海明距离最小值应为(5)。©) <BR>答： <INPUT
class=radio name=text1512 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.d<BR> <INPUT class=radio name=text1512
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.d+l<BR> <INPUT class=radio name=text1512
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.d—1<BR> <INPUT class=radio name=text1512
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.2d+l<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>4 </TD>
<TD align=left height=212 width=607> TCP使用 (7) 次握手协议建立连接。©)
<BR>答： <INPUT class=radio name=text1515
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.1<BR> <INPUT class=radio name=text1515
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.2<BR> <INPUT class=radio name=text1515
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.3<BR> <INPUT class=radio name=text1515
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.4<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>5 </TD>
<TD align=left height=212 width=607> TCP这种建立连接的方法可以防止 (9) 。©)
<BR>答： <INPUT class=radio name=text1518
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.出现半连接<BR> <INPUT class=radio name=text1518
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.无法连接<BR> <INPUT class=radio name=text1518
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.假冒的连接<BR> <INPUT class=radio name=text1518
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.产生错误的连接<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>6 </TD>
<TD align=left height=212 width=607> ATM网络采用 (11) 多路技术传送信元©)
<BR>答： <INPUT class=radio name=text1520
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.统计时分<BR> <INPUT class=radio name=text1520
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.同步时分<BR> <INPUT class=radio name=text1520
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.频分<BR> <INPUT class=radio name=text1520
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.码分<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>7 </TD>
<TD align=left height=212 width=607>
采用短的、固定长度的信元，为使用硬件进行高速，数据交换创造了条件。ATM是为B-ISDN定义的传输和交换方式，可以适应各种不同特性的电信业务，CBR(ConstantBitRate)模拟
(13) 业务©) <BR>答： <INPUT class=radio name=text1522
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.报文交换<BR> <INPUT class=radio name=text1522
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.分组交换<BR> <INPUT class=radio name=text1522
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.电路交换<BR> <INPUT class=radio name=text1522
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.时分交换<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>8 </TD>
<TD align=left height=212 width=607>
ATM是为B-ISDN定义的传输和交换方式，可以适应各种不同特性的电信业务，适用这种业务的ATM适配层是 (14) ©) <BR>答：
<INPUT class=radio name=text1524 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.AAL1<BR> <INPUT class=radio name=text1524
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.AAL2<BR> <INPUT class=radio name=text1524
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.AAL3/4<BR> <INPUT class=radio name=text1524
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.AAL5<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>9 </TD>
<TD align=left height=212 width=607>
设信道带宽为3000Hz，根据尼奎斯特(Nyquist)定理，理想信道的波特率为 (16) 波特©) <BR>答： <INPUT
class=radio name=text1526 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.3000<BR> <INPUT class=radio name=text1526
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.6000<BR> <INPUT class=radio name=text1526
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.12000<BR> <INPUT class=radio name=text1526
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.24000<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>10 </TD>
<TD align=left height=212 width=607>
设信道带宽为3000Hz，根据尼奎斯特(Nyquist)定理，如果该信道信噪比为30dB，则该信道的带宽约为 (18) 。©) <BR>答：
<INPUT class=radio name=text1529 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.10Kb／s<BR> <INPUT class=radio name=text1529
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.20Kb／s<BR> <INPUT class=radio name=text1529
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.30Kb／s<BR> <INPUT class=radio name=text1529
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.40Kb／s<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>11 </TD>
<TD align=left height=212 width=607>
ICMP协议属于TCP／IP网络中的(21)协议©) <BR>答： <INPUT class=radio name=text1534
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.数据链路层<BR> <INPUT class=radio name=text1534
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.网络层<BR> <INPUT class=radio name=text1534
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.传输层<BR> <INPUT class=radio name=text1534
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.会话层<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>12 </TD>
<TD align=left height=212 width=607> ICMP有13种报文，常用的ping程序中使用了
(23) 报文，以探测目标主机是否可以到达。©) <BR>答： <INPUT class=radio name=text1538
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.地址掩码请求／响应<BR> <INPUT class=radio
name=text1538 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.回送请求脏答<BR> <INPUT class=radio name=text1538
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.信息请求／响应<BR> <INPUT class=radio name=text1538
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.时间戳请求／响应<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>13 </TD>
<TD align=left height=212 width=607> 如果网络中出现拥塞，则路由器产生一个_(25)_
报文。©) <BR>答： <INPUT class=radio name=text1542
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.超时<BR> <INPUT class=radio name=text1542
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.路由重定向<BR> <INPUT class=radio name=text1542
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.源端抑制<BR> <INPUT class=radio name=text1542
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.目标不可到达<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>14 </TD>
<TD align=left height=212 width=607>
在IPv6中，地址被扩充为128位，并且为IPv4保留了一部分地址空间。按照IPv6的地址表示方法，以下地址中属于IPv4地址的是 (29) 。©)
<BR>答： <INPUT class=radio name=text1549
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.0000：0000：0000：0000：0000：FFFF：1234：1180<BR>
<INPUT class=radio name=text1549 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.0000：0000：0000：1111：111t：FFFF：1234：1180<BR>
<INPUT class=radio name=text1549 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=C>C.0000：0000：FFFF：FFFF：FFFF：FFFF：1234：1180<BR>
<INPUT class=radio name=text1549 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=D>D.FFFF：FFFF：FFFF：FFFF：FFFF：FFFF：1234：1180<BR></TD></TR>
<TR class=trh1>
<TD align=middle height=212 width=29>15 </TD>
<TD align=left height=212 width=607> (30)
是IPv6的测试床，实际上是一个基于IPv4的虚拟网络，用于研究和测试IPv6的标准、实现以及IPv4向IPv6的转变过程。©) <BR>答：
<INPUT class=radio name=text1550 onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=A>A.6bone<BR> <INPUT class=radio name=text1550
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
value=B>B.6bed<BR> <INPUT class=radio name=text1550
onblur="this.className='radio'"
onfocus="this.className='inputedit';this.select()" type=radio
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