初級(jí)通信工程師考試每日一練【10、31】

備考初級(jí)通信工程師，做題是必不可少的，以下是小編為大家整理的初級(jí)通信工程師考試每日一練，更多考試相關(guān)資訊可關(guān)注希賽通信工程師頻道。

1、科技工作者進(jìn)行科技活動(dòng)的出發(fā)點(diǎn)和歸宿是（）。
A．造福人民、振興祖國(guó)

B．熱愛專業(yè)、忠于職責(zé)
C．實(shí)事求是、追求真理
D．勇于探索、敢于創(chuàng)新
2、當(dāng)固定電話用戶有事外出時(shí)，為及時(shí)接聽電話，可登記使用（）業(yè)務(wù)。
A．呼叫等待 B．遇忙回叫
C．呼出限制 D．無條件轉(zhuǎn)移
3、下列協(xié)議中，屬于文件傳送協(xié)議的是（）。
A、SNMP  B、UDP C、FTP  D、RIP
4、在通信專業(yè)中，MAC的英文全稱是（），調(diào)制的英文通常翻譯為（）。
A、Media access control  B、media access concect
C、medtiple access control  D、multiple access connect
A、adjust  B、medies
C、modulation D、modulator
5、【A popular service that has attercted the interest of companies and has home users alike is the sending of voice signals over an IP-based network,such as the Internet.The practice of making telephone calls over the internet has had a number of different names,including packet voice,voice over packet,voice over the internet,internet telephone,and Voice over Ip（Voip）.But it appears the industry has settled on the term”Voice ove IP”in reference to the internet protocol,which controls the transfer of data over the internet.There are currently three ways to deliver VoIp to users,the first technique is found at the corporate level.Many companies are offering VoIP systerms that operate over a local area network.These systems involve a fair amount of equipment,such as VoIP servers,special IP-enabled telephones,and routers that can direct telephone calls.Today a large portion of corporate sites have converted their older internal telephone systems to VoIP systems that opreate over a LAN,thus converging two systems into one.A second common solution is the one often encountered at home.Using existing telephones,a special converter is added between the telephone and a high speed internet（DSL or cable modem）connection.The converter digitizes the voice signal and creates a stream of packets that are then sent over an ip connection.The third technique involves smart cell phones.Never cell technologies are all packet-based,thus requiring a telephone call to be converted to digital packets and sending those packets over IP networks.】
From the paragraph above，a popular service that has attracetd the interest of companies and home users,is termed as（）.The data transfer over the Internet is controlled by the（）.At corporate level,many companies have replaced their older internal telephone systerms with（）that oprerate over a local area network.
A、voice over the internet
B、voice over packet
C、Voice over IP
D、internet telephony
A、packet B、internet protocol C、industry  D、VoIp servers
A、VoIP systems  B、IP-enablde telephones C、VoIP servers  D、routers
6、電信條例規(guī)定，經(jīng)營(yíng)基礎(chǔ)電信業(yè)務(wù)的公司的股權(quán)結(jié)構(gòu)中，國(guó)有股權(quán)或股份不得少于（）。
A．40% B．50%  C．51%  D．61%
7、能夠在通信_(tái)中以較低成本迅速靈活地引人新業(yè)務(wù)的是（）技術(shù)。
A．虛擬網(wǎng)  B．智能網(wǎng) C．移動(dòng)通信  D．程控交換
8、下列業(yè)務(wù)中，能同時(shí)處理多種媒體格式信息的是（）。
A．短信  B．彩信  C．緊急呼叫  D．語音信箱
9、閱讀下面的短文，回答問題
[When an IP packet arrives at a router,generally the router looks at the destination address of the packet,and forwards the packet to one of its network interfaces.The forwarding decision is usually done by looking up the destination address from another data structure called a forwarding table.The forwarding table is created by the router using the routing table and possible routing policies existing in the router.The router then creates a table where it lists which networks are accessible through which of the router’s network interfaces.An IP router looks at every IP packet individually and does the forwarding decision on a packet-by-packet basis.If something changes in the router’s routing table,a packet can take a different route from a preceding packet even if it has the same destination.]
From the paragraph above，we can see that the router（）a forwarding table according to the routing table and possible routing policies existing in the router.When an IP packet arrives at a router,the（）part of packet is normally checked by the router.An IP router checks every IP
Packet individually and makes the forwarding decision based on（）.
A．is generating  B．generate C．is generated D．generates
A．forwarding table  B．network interfaces
C．routing policies  D．destination address
A．the destination address and network interfaces
B．forwarding table and network interfaces
C．the destination address and forward table
D．routing policies and routing table
10、光纖通信的特點(diǎn)之一是傳輸頻帶寬，傳輸容量大。在零色散波長(zhǎng)窗口，單模光纖都具有（47）吉赫•千米（GHz•km）的帶寬。
A.1至2 B.幾十 C.幾千  D.幾十萬

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