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ere are enforceable. Exe files have bee a strange pattern, the pattern shown as Panda Burning incense, and then System blue screen, restart the frequent, hard drive data destruction, serious entire pany All puter LAN will all poisoning. Panda burning incense, only more than half a month, a few varieties have high Of more than 50, and the number of its users infected 重慶郵電大學(xué)移通學(xué)院畢業(yè)設(shè)計(jì)(論文) 31 constantly expanding. Makes infected, Panda burn incense disease The personal drug users has been as high as several million people infected with a few more corporate users is rising exponentially. Network More on the puter work the greater the harm caused by the virus. V. work transmission of the virus Features 1. Infection fast: single machine environment, the virus can only be passed from one puter diskette To another, and in the work can be adopted by the rapid spread of work munication mechanism. According to measurement Set against a typical PC work use in normal circumstances, once a puter workstation sick Drugs, and will be online within 10 minutes in the several hundreds of all infected puters. 2. Proliferation of a wide range: in the work due to the spread of the virus very quickly and spread to enpass a large area, not only the rapid transmission of all LAN puter, but also through remote workstations virus in Inter spread to thousands of miles away. 3. Dissemination in the form of plex and varied: puter viruses in general through the work Station server workstation channels of munication, but in the form of plex and diverse munication. 4. Difficult to pletely wipe: the standalone puter virus carriers sometimes can be deleted documents Or lowlevel formatted drives, and other measures to eliminate the virus pletely, and the work once a puter work Clean stations failed to disinfect the entire work can be reinfected by the virus, or even just pleted removal The work of a workstation is likely to be online by another workstation virus infection. Therefore, Only workstations in addition to killing viruses, and can not solve the virus harm to the work is. 6, the type of work virus As the work increasingly developed, the type of work virus has been increasing, generally summed up as The following categories: 1. Worm It is the use of the transmission mechanism of replication and dissemination work, the mode of transmission is through the work And , the prefix is Worm. For example, in recent years the great harm Nimda virus is Demodex A worm virus. The virus used Microsoft39。而隨著計(jì)算機(jī)技術(shù)的不斷發(fā)展 , 病毒也變得越來(lái)越復(fù)雜和高級(jí) , 新一代的計(jì)算機(jī)病毒充分利用某些常用操作系統(tǒng)與應(yīng)用軟件的低防護(hù)性的弱點(diǎn)不斷肆虐 , 最近幾年隨著因特網(wǎng)在全球的普及 , 將含病毒文件附加在郵件中的情況不斷增多 , 通過(guò)網(wǎng)絡(luò)傳播病毒 , 使得病毒的擴(kuò)散速度也急驟提高 , 受感染的范圍越來(lái)越廣。網(wǎng)絡(luò)病毒是一個(gè)新興的概念 , 在傳統(tǒng)的病毒分類里沒(méi)有網(wǎng)絡(luò)病毒這個(gè)概念 , 由于網(wǎng)絡(luò)的發(fā)展 , 傳統(tǒng)的病毒也就具有了一些網(wǎng)絡(luò)的特性。 四、網(wǎng)絡(luò)病毒的危害 網(wǎng)絡(luò)上病毒破壞性大 , 將直接影響網(wǎng)絡(luò)的工作 , 輕則降低速度 , 影響工作效率 , 重則使網(wǎng)絡(luò)崩潰 , 破壞服務(wù)器信息 , 使多年工作毀于一旦。如 : “熊貓燒香”除了通過(guò)網(wǎng)站帶毒感染用戶之外 , 此病毒還會(huì)通過(guò) 最新漏洞傳播自身 , 通過(guò)網(wǎng)絡(luò)文件共享、默認(rèn)共享、系統(tǒng)弱口令、 U 盤及窗體頂端窗體底端移動(dòng)硬盤等多種途徑傳播。使得感染“熊貓燒香”病毒的個(gè)人用戶已經(jīng)高達(dá)幾百萬(wàn) , 企業(yè)用戶感染數(shù)更是成倍上升。 : 由于病毒在網(wǎng)絡(luò)中擴(kuò)散非???, 擴(kuò)散范圍很大 , 不但能迅速傳染局域網(wǎng)內(nèi)所有計(jì)算機(jī) , 還能通過(guò)遠(yuǎn)程工作站將病毒在一瞬間傳播到千里之外。 六、網(wǎng)絡(luò)病毒的類型 由于網(wǎng)絡(luò)越來(lái)越發(fā)達(dá) ,網(wǎng)絡(luò)病毒的種類也越來(lái)越多 ,大體歸納為以下幾類 : ,它的傳染機(jī)理是利用網(wǎng)絡(luò)進(jìn)行復(fù)制和傳播 , 傳染途徑是通過(guò)網(wǎng)絡(luò)和電子郵件 ,前綴是 Worm。前綴是Macro,一旦打開(kāi)這樣的文檔 ,其中的宏就會(huì)被執(zhí)行 ,于是宏病毒就會(huì)被激活 ,轉(zhuǎn)移到計(jì)算機(jī)上 ,并駐留在 Normal 模板上。如格式化 c 盤 () 、殺手命令(Harm. ) 等。 ,后門病毒的前綴是 Backdoor。 如 : 捆綁重慶郵電大學(xué)移通學(xué)院畢業(yè)設(shè)計(jì)(論文) 37 () 、系統(tǒng)殺手 () 等。 ,捆綁機(jī)病毒的前綴是 : Binder。這些病毒的一般公有的特性是可以感染 windows 操作系統(tǒng)的 *.exe 和 *.dll 文件 , 并通過(guò)這些文件進(jìn)行傳播。 ,破壞性程序病毒的前綴是 : Harm。這一病毒利用了微軟視窗操作系統(tǒng)的漏洞 , 計(jì)算機(jī)感染這一病毒后 , 會(huì)不斷自動(dòng)撥號(hào)上網(wǎng) , 并利用文件中的地址信息或者網(wǎng)絡(luò)共享進(jìn)行傳播 , 最終破壞用戶的大部分重要數(shù)據(jù)。 : 單機(jī)上的計(jì)算機(jī)病毒有時(shí)可通過(guò)刪除帶毒文件或低級(jí)格重慶郵電大學(xué)移通學(xué)院畢業(yè)設(shè)計(jì)(論文) 36 式化硬盤等措施將病毒徹底清除 , 而網(wǎng)絡(luò)中只要有一臺(tái)工作站未能消毒干凈就可使整個(gè)網(wǎng)絡(luò)重新被病毒感染 , 甚至剛剛完成清除工作的一臺(tái)工作站就有可能被網(wǎng)上另一臺(tái)帶毒工 作站所感染。 五、網(wǎng)絡(luò)病毒傳播特點(diǎn) : 在單機(jī)環(huán)境下 , 病毒只能通過(guò)軟盤從一臺(tái)計(jì)算機(jī)帶到另一臺(tái) , 而在網(wǎng)絡(luò)中則可以通過(guò)網(wǎng)絡(luò)通訊機(jī)制迅速擴(kuò)散。中毒癥狀表現(xiàn)為電腦中所有可執(zhí)行的 .exe 文件都變成了一種怪異的圖案 , 該圖案顯示為“熊貓燒香” , 繼而系統(tǒng)藍(lán)屏、頻繁重啟、硬盤數(shù)據(jù)被破壞等 , 嚴(yán)重的整 個(gè)公司局域網(wǎng)內(nèi)所有電腦會(huì)全部中毒。未來(lái)幾年 , 安防市場(chǎng)規(guī)模將達(dá)到 600 億元。 三、網(wǎng)絡(luò)病毒與計(jì)算機(jī)病毒的區(qū)別 原先常見(jiàn)的計(jì)算機(jī)病毒的破壞性無(wú)非就是格式化硬盤 , 刪除系統(tǒng)與用戶文件、破壞數(shù)據(jù)庫(kù)等等。 一、計(jì)算機(jī)病毒 計(jì)算機(jī)病毒的定義計(jì)算機(jī)病毒 (Computer Virus)在《中華人民共和國(guó)計(jì)算機(jī)信息系統(tǒng)安全保護(hù)條例》中被明確定義 , 病毒“指編制或者在計(jì)算機(jī)程序中插入的破壞計(jì)算機(jī)功能或者破壞數(shù)據(jù) , 影響計(jì)算機(jī)使用并且能夠自我復(fù)制的一組計(jì)算機(jī)指令或者程序代碼”。s system and hidden, and then leaked to the outside world User information, hackers virus there is a visual interface to the user39。s reliance on them will keep growing. With With the continuous development of puter technology, the virus has bee increasingly plex and senior, the new generation of Computer viruses make full use of certain monly used operating systems and application software for protection of the weak low Spots have rampant in recent years as the popularity of the Inter in the world, will be attached document containing the virus The situation in the mail has been increasing spread of the virus through the Inter, making the spread of the virus speed Sharp also increased, by an everincreasing scope of the infection. Therefore, the protection of the security of puter works will be Will bee increasingly important. A puter virus The definition of puter virus puter virus (Computer Virus) in the people39。 在短暫的幾個(gè)月的相處時(shí)間里,老師淵博的知識(shí)、敏銳的思路和實(shí)事求是的工作作風(fēng)給我留下了深刻的印象,這將使得我終身受益,謹(jǐn)此向 我的指導(dǎo) 老師 表示衷心的感謝和崇高的敬意。所以,如何規(guī)劃一個(gè)優(yōu)質(zhì)的網(wǎng)絡(luò)環(huán)境,是網(wǎng)吧經(jīng)營(yíng)者必須要考慮的一個(gè)重點(diǎn),網(wǎng)吧網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)設(shè)計(jì)、網(wǎng)吧的綜合布線和網(wǎng)絡(luò)設(shè)備采購(gòu),都 成為組建一個(gè)優(yōu)質(zhì)網(wǎng)絡(luò)的重要環(huán)節(jié)。 重慶郵電大學(xué)移通學(xué)院畢業(yè)設(shè)計(jì)(論文) 26 結(jié)論 網(wǎng)吧所提供的服務(wù),全部與網(wǎng)絡(luò)有關(guān)。 路由器與交換機(jī)的連接與配置 路由器是一種連接多個(gè)網(wǎng)絡(luò)或網(wǎng)段的網(wǎng)絡(luò)設(shè)備,可以將多個(gè)不同網(wǎng)絡(luò)或者網(wǎng)段彼此之間進(jìn)行連接。在一個(gè)有著 2 臺(tái)以上交換機(jī)的網(wǎng)絡(luò)中,由于交換機(jī)的端口速率不一樣,所以它們的連接方式也不一樣。 目前,網(wǎng)吧一般都是由路由器 主交換機(jī) 交換機(jī) 客戶機(jī)的網(wǎng)絡(luò)模式。 重慶郵電大學(xué)移通學(xué)院畢業(yè)設(shè)計(jì)(論文) 24 圖 72 網(wǎng)吧組建方案 網(wǎng)吧的布線 網(wǎng)吧目前所提供的如網(wǎng)頁(yè)瀏覽、在線電影、網(wǎng)絡(luò)游戲、遠(yuǎn)程教育等最基本的服務(wù)都與網(wǎng)絡(luò)有關(guān),網(wǎng)絡(luò)質(zhì)量的好壞直接決定了網(wǎng)吧的生存能力。所有的計(jì)算機(jī)和交換機(jī)以及它們之間連接的雙絞線都是用于同一網(wǎng)絡(luò)之內(nèi)的,所以,路由器上至少有兩個(gè)接口,分別用于內(nèi)網(wǎng)與外網(wǎng)的連接。 (3)交換機(jī) 的選擇:交換機(jī)是有線局域網(wǎng)中最為重要的網(wǎng)絡(luò)設(shè)備之一,它將所有的網(wǎng)絡(luò)設(shè)備集中連接起來(lái)。在整個(gè)網(wǎng)絡(luò)布線當(dāng)中,雙絞線的用量非常大,成