1、譯文 計(jì)算機(jī)網(wǎng)絡(luò) 數(shù)據(jù)通信 圖 14數(shù)據(jù)通信鏈路的簡(jiǎn)化框圖。雖然圖中只畫了一個(gè)從設(shè)備，但它代表了多點(diǎn)系統(tǒng)中的典型從設(shè)備。主計(jì)算機(jī)的功能之一是存儲(chǔ)供各種設(shè)備使用的應(yīng)用程序。 端設(shè)備可以是計(jì)算機(jī)、打印機(jī)、鍵盤、 ，它們可以產(chǎn)生要發(fā)送的數(shù)字信息，也可使用所接收的數(shù)字?jǐn)?shù)據(jù)。這種設(shè)備通常在內(nèi)部以字為單位處理數(shù)字信息 在一個(gè)實(shí)際設(shè)備中構(gòu)成一個(gè)字的所有位是并行傳遞的。數(shù)字?jǐn)?shù)據(jù)在發(fā)送一個(gè) 8 對(duì)傳輸線，這是不經(jīng)濟(jì)的。那些在發(fā)送、接收數(shù)據(jù)分別完成并 并轉(zhuǎn)換并進(jìn)行數(shù)據(jù)鏈路管理的所有電路，一般稱為數(shù)據(jù)終端 設(shè)備（ 用異步接收 /發(fā)送。

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5、第 1 頁(yè) 共 3 頁(yè)上海交通大學(xué)繼續(xù)教育學(xué)院模擬試題一. 簡(jiǎn)單填空題（每空 1 分，共 20 分）1. OSI 模型中，通常是__數(shù)據(jù)鏈路__層負(fù)責(zé)將比特流或字符流轉(zhuǎn)換成幀格式。2. HUB 是工作在__物理__層的設(shè)備。3. 對(duì)于網(wǎng)絡(luò)模型來說，路由器是工作在__網(wǎng)絡(luò)__層的設(shè)備。4. FTP、Telnet 等屬于_應(yīng)用___層的協(xié)議。5. HFC 用到了 __FDM__和_TDM___兩種多路復(fù)用技術(shù)。6. 一路電話的帶寬為__64__ Kbps。7. 100Mbps 的以太網(wǎng)的波特率是__125__波特。8. BGP 協(xié)議采用路由算法是基于__距離矢量__的。9. RIP 采用的路由算法是__D-V__算法，OSPF 采用的路由算法。

6、1 / 22電大計(jì)算機(jī)網(wǎng)絡(luò)本科期末復(fù)習(xí)考試資料小抄一、是非題1計(jì)算機(jī)網(wǎng)絡(luò)主要是達(dá)到資源共享和網(wǎng)絡(luò)安全的和諧統(tǒng)一。 ()2實(shí)體是層次模型中每一層用于實(shí)現(xiàn)該層功能的活動(dòng)元素。 ( )3IP 地址是 TCP/IP 協(xié)議族中傳輸層所定義的協(xié)議內(nèi)容。 ()4在信息、數(shù)據(jù)、信號(hào)三者關(guān)系中，數(shù)據(jù)是用來表達(dá)信號(hào)。 ()5數(shù)字信號(hào)既可以是離散的也可以是連續(xù)的。 ()6復(fù)用技術(shù)主要是用來提高信道的利用率，通常使用數(shù)據(jù)壓縮技術(shù)來實(shí)現(xiàn)。()7數(shù)據(jù)交換技術(shù)的主要功能是實(shí)現(xiàn)兩個(gè)用戶數(shù)據(jù)的交換。 ()81EEE802.3 協(xié)議通常被稱為以太網(wǎng)協(xié)議，包含了兩大主流協(xié)議即 CSMA/CD 協(xié)。

7、最新電大小抄電大計(jì)算機(jī)網(wǎng)絡(luò)本科期末復(fù)習(xí)考試資料小抄一、是非題1計(jì)算機(jī)網(wǎng)絡(luò)主要是達(dá)到資源共享和網(wǎng)絡(luò)安全的和諧統(tǒng)一。 ()2實(shí)體是層次模型中每一層用于實(shí)現(xiàn)該層功能的活動(dòng)元素。 ( )3IP 地址是 TCP/IP 協(xié)議族中傳輸層所定義的協(xié)議內(nèi)容。 ()4在信息、數(shù)據(jù)、信號(hào)三者關(guān)系中，數(shù)據(jù)是用來表達(dá)信號(hào)。 ()5數(shù)字信號(hào)既可以是離散的也可以是連續(xù)的。 ()6復(fù)用技術(shù)主要是用來提高信道的利用率，通常使用數(shù)據(jù)壓縮技術(shù)來實(shí)現(xiàn)。()7數(shù)據(jù)交換技術(shù)的主要功能是實(shí)現(xiàn)兩個(gè)用戶數(shù)據(jù)的交換。 ()81EEE802.3 協(xié)議通常被稱為以太網(wǎng)協(xié)議，包含了兩大主流協(xié)議即 CSMA/。