2022年01月11日来源:信管网 作者:cnitpm
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网络工程师每日一练试题内容(2022/1/10)
试题1: MIDI enables people to use (1) computers and electronic musical instruments . There are actually three components to MIDI, the communications " (2) ", the Hardware interface and a distribution (3) called "Standard MIDI Files". In the context of the WWW, the most interesting component is the (4) Format. In principle, MIDI files contain sequences of MIDI Protocol messages. However, when MIDI Protocol (5) are stored in MIDI files, the events are also time-stamped for playback in the proper sequence. Music delivered by MIDI files is the most common use of MIDI today.
(1)A、personal
B、electronic
C、multimedia
D、network
(2)A、device
B、protocol
C、network
D、controller
(3)A、format
B、text
C、wave
D、center
(4)A、Video
B、Faxmail
C、Graphic
D、Audio
(5)A、messages
B、packets
C、frame
D、information
8个9600b/s的信道按时分多路复用在一条线路上传输,在统计TDM情况下,假定每个子信道有80%的时间忙,复用线路的控制开销为5%,那么复用线路的带宽为 ( ) 。
A、32kb/s
B、64 kb/s
C、72 kb/s
D、96 kb/s
在Windows操作系统中,与访问Web无关的组件是 ( ) 。
A、DNS
B、TCP/IP
C、IIS
D、WINS
ADSL采用 (1)技术把PSTN线路划分为话音、上行和下行三个独立的信道,同时提供电话和上网服务。采用ADSL联网,计算机需要通过(2) 和分离器连接到电话入户接线盒。
(1)A.对分复用
B.频分复用
C.空分复用
D.码分多址
(2)A.ADSL交换机
B.Cable Modem
C.ADSL Modem
D.无线路由器
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