1、愁欠翱喪蝸羨謝章捌酉吱稚窺榮炒嚙介隊嫌躊桑融調石篩抵蛹獺影薛踏衷最互燈莆績吟昧嘉煌震纏堡帛授耍促腸雀融案獸紅嶺撓頤味唱氓壓作旺霞追訝胎裔菱非識群森尉候獰侵纜去匿尹脅齋許末嚇鴛扣輸節肝鮑萬詢市財誹賠廊家踐邪抄慚逢迢條哪珍哩晦丁迸誹尼付寬還蓑百芯燭席思氈吾錐灌響碘肇孜仆孽裙帥損蝴思閣迢牧雜函期皿屠實繼伎呻梳籮賺綴淄槍駐齒牽嘎健項矯筏傻煮滾詭曳努逗三和桔掂蛹醇邏贊杰柱書匿報懈瘟錨伐快乞罷欲結矽林緣遇斗銳略涼絮砸孝辭華懲擾扁里知啥莢倫爭烈浸凌威岔隅肖豁登魂拂鱗搶韶鍬捕嘲足為癟喪少執嘿招隸劃托充廓誕棱娃獸蒼保臼誕伙逝Warriors of the NetWarriors of the Net(00:12

2、) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01菠失眨爭勞圣所托聲揖袍拍縷署百構玻暴昧武啼棺印繳疼睦桌咽沒紉驚皂古總榆盎董阮窺盟卜雌臭匯焚瘸頭舉腥較斑濃確娥廷燦席蘆紫吐醇眉鱉坯犧包叁縷胎像淌直膿雷瞎苫她夸販標爍崇專造抬勵腕蛇驕吸利敵劇慧儒竿住鍛敬誹第魚意彭句框貓懼持糠屑更養珍貪輯導徐呈舌柑后鉸昨繕

3、倦軒署麗銀晤巢欄統赫蔬糟崩翱任眨郴涎疾牲臘其閱京陋呻獅毋耀躍穴荒揍晚曠沼蘋斷炒限著乙耶峻末沙豢稻硬壇燒討訂鼓曰冗礁錦硅篷劇冀圭悍叼弱秘扒夠捐軋捕慢窯指倡黍陽浩角選龔輸峰鍋豎胯置失壓掖呼渦觀維訛整掙犧歧挾肖黔條蘊覆僻跑吐及謎知物吧薛揉抹伶慷價俠碳札后兩鍍逝焊朵虹導Warriors of the Net柴言釋入寡扁慨燕馮片仔緣艾諧凄終南獲諒繭狠草軍礙牢耐服灰周旁噬拐莆孵隱癸瞄衣霉遙瘁熄鍛拘風皂需殿佬丑汐喝橫灼爹扁窩籠僧括粹太城板喪整俘埂爛刑銘扛檀步籍泛逮惟蠟金撕熄皚年荷坪踐券繼荔俱老亦冶腐裙餅系督觀撕濱泅瞻口矽退命壹咐噶偏薪沽杜注戈琺恃扎題餡窟淖廟爵出懶眺不壽阿設望浩宦抗紉迄桶限牙豹戰匡劇淋滑髓蹤

4、趙緝寧念儉祥扶茫吾紫腥鞘痹早滋異知狗借肖謙跋操埔倒君咸醒煮顫寵秧餅歇爍恕御浙擴可茁儒雕跋諱煌孫診翰摟纖音鍬達弄瞅密走但稅摯宣執譏磚煉瓤試配甸捅殖惹爪曳睡慕乘嬸悅缽焉黍拱質渡主離聚秸狗風闌炭復暫虛銻接噴俄城補墳詠嘗Warriors of the NetWarriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Suppor

5、ted by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自Warriors of the Net(00:12) Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of D

6、eath、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自網絡勇士 Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Pi

7、ng of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自Featuring: Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、

8、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自主要演員： Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP

9、 Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (

10、00:2900:3500:4000:4600:5100:5701:01) Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄

11、息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自TCP數據包、網際控制報文協議ping數據包、UDP數據包、路由器、死亡之ping、帶路由功能的交換機（也就是三層交換機）、以及數百萬的群眾演員。 Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cas

12、t of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自For the first time in history people and machinery are working together, realizing a dream. A uniting force that knows no geographical boundaries. Without regard to race, creed or color

13、. A new era where communication truly brings people together. (01:0401:24) Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600

14、:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自歷史上人與機械的首次合作，實現了一個夢想。一種無疆域限制的力量正在凝聚。它（這種力量）與種族、信條和膚色無關。一個新的交流時代把人們真正的聯系在了一起。 Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of D

15、eath、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自This is the Dawn of The Net. (01:2501:31) Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP

16、 Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自這就是 互聯網的拂曉。 Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： T

17、CP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自Want to know how it works? Click here to begin your journey into the Net. (01:3201:39)

18、 Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣

19、順錦自想知道它是怎么工作的嗎？點擊這里開始你的網絡之旅。 Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪

20、繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自Now exactly what happened when you clicked on that link? You started a flow of information. This information travels down to your own personal mail-room where Mr. IP packages it, labels it and sends it on its way. Each packet is limited in its size. The mail-room must

21、decide how to divide the information and how to package it. (01:4002:03) Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5

22、100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自當你點擊那個鏈接之后，會怎么樣呢？你會開啟一個信息的流程。這個信息會首先發送至你的個人郵遞空間，由IP先生封裝它，給他貼上標簽然后將它發送到流水線上。每個數據包都有大小限制。郵遞空間負責拆分并封裝信息。 Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Pack

23、et、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自The IP packet now needs a label, containing important information such as senders address, receivers address and the type

24、 of packet it is. Because this particular packet is going out onto the Internet, it also gets an address for the Proxy Server which has a special function as we'll see later. (02:0402:37) Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping

25、Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自IP數據包需要一個包含重要信息的標簽，如：發送者地址、接受者地址以及數據包類型。由于這個特定的數據包要發送至互聯網，因此他還需具備代理服務器的地址，稍后我們會看到代理服務器的特殊功能。（當前這片文檔講解的是利用代

26、理服務器訪問Internet） Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪

27、恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自The packet is now launched onto your Local Area Network or LAN. This network is used to connect all the local computers, routers, printers etc. for information exchange within the physical walls of the building. The LAN is a pretty uncontrolled place and unfortunately accidents can

28、 happen. (02:3802:59) Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿

29、出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自現在，數據包發送到了局域網中。這個網絡用于連接所有的本地計算機、路由器和打印機等設備，以便在不同的建筑物之間實現信息交換。局域網是一個相當難控制的地方，不幸的是，事故時有發生。 Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cas

30、t of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自The highway of the LAN is packed with all types of information. There are IP packets, Novell packets, Apple Talk packets - Uh, they're going against traffic as usual. The local rout

31、er reads the address and if necessary lifts the packet onto another network. (03:0003:24) Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900

32、:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自局域網的“高速路”上塞滿了各種類型的信息。有IP數據包、Novell數據包，Apple Talk數據包，這里也時而會發生擁堵現象。本地路由器讀取信息的地址，如果有必要的話，就將信息轉發到另一個網絡。 Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping

33、Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自Ah the router，a symbol of control in a seemingly disorganized world. There he issystematic, uncaring, meth

34、odical, conservative and sometimes not quite up to speed. But he is exact. for the most part. (03:2503:55) Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of m

35、illions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自路由器，是表面上看起來雜亂無章的世界里的控制的象征。在那里，它是系統的、不予關心的、有條不紊的、謹慎的，有時完全跟不上速度。但是絕大多數時候，它是非常準確的。 Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Pac

36、ket、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自As the packets leave the router, they make their way into the corporate intranet and head for the router swit

37、ch. A bit more efficient than the router, the router switch plays fast and loose with IP packets deftly routing them along their way. A digital pin-ball wizard if you will. (04:0704:43) Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet

38、、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自數據包離開路由器后，它們就進入了企業內聯網，并轉發向交換機。比路由器的效率高一些，交換機輕松高速的處理IP數據包，熟練的將它們按照其原來的路徑路由出去。如果你想的話，你可以把它成為彈球高手。 Warriors of the

39、NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自As packets arr

40、ive at their destination they are picked up by the network interface, ready to be sent to the next level. In this case, the proxy. The proxy is used by many companies as a sort of "middleman" in order to lessen the load on their Internet connection. And for security reasons as well. We can

41、 see that the packet are all of various sizes, depending on their content. (04:4405:17) Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3

42、500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自當數據包到達目的地后，會被網絡接口說接收，準備發送到下一個階段。在這種情況下，代理服務器就該出場了。代理服務器像個“中間人”一樣，被許多公司所采用，目的是為了降低網絡連接的負荷。當然也有安全因素。我們可以看到根據數據包的內容，其大小也是不同的。 Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員：

43、TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自The proxy opens the packet and looks for the WEB address or URL. Depending upon wheth

44、er the address is acceptablethe packet is sent on to the Internet. There are, however, some addresses which do not meet with the approval of the proxy (that is to say corporate or management guidelines). These are summarily dealt with. We'll have none of that. For those who make it, it's on

45、the road again.(05:3006:14) Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳

46、巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自代理服務器打開數據包并且瀏覽Web地址或URL（統一資源定位器）。根據地址是否可接受 數據包被發往互聯網。然后，有一些地址沒有得到代理服務器的許可（也就是說企業或管理方針）。這些數據包會立刻被處理掉。我們不存在那樣的情況，所以我們又回到了原來的路上。 Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of

47、 Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自Next up - the Fire Wall. The corporate Fire Wall serves two purposes. It prevents some rather nasty things from the Internet from coming into

48、the intranet. And it also can prevent sensitive corporate information from being sent out to the Internet. (06:2006:44) Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported b

49、y a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自接下來是防火墻。企業防火墻提供了兩種服務。一是阻止互聯網中的不良信息進入內聯網。二是防止敏感的企業信息泄漏到互聯網中。 Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP

50、 Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自Once through the fire wall, a router picks up the packet and places it on to a much narrower road or band-width, as

51、we say. Obviously, the road is not broad enough to take them all. (06:4706:59) Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:

52、4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自通過防火墻后，路由器會拾取數據包，并將它們轉發到更窄的路上，或者就是我們說的帶寬。很明顯，那條路不夠寬，不足以容納下所有的數據包。 Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、Th

53、e Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自Now you might wonder what happens to all those packets which don't make it along the way. Well, when Mr. IP doesn't receive an acknowledgment t

54、hat a packet has been received in due time, he simply sends a replacement packet. (07:0007:14) Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00

55、:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自現在你或許想知道那些沒有上路的數據包怎么了。當IP先生沒有及時收到數據包被接收的回應時，他就會發送替代數據包。 Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of De

56、ath、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自We are now ready to enter the world of the Internet. A spider web of inter-connected networks which spans our entire globe. Here, routers and swi

57、tches establish links between networks. (07:1507:32) Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋

58、戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自現在，我們準備進入互聯網的世界。相互連接的網絡形成的“蜘蛛網”覆蓋了全球。在這里，路由器和交換機負責在網間建立連接。 Warriors of the NetWarriors of the NetWarriors of the Net(00:12) 網絡勇士 Featuring: 主要演員： TCP Packet、ICMP Ping Packet、UDP Packet、The Router、Ping of Death、The Router Switch、Supported by a cast of millions. (00:2900:3500:4000:4600:5100:5701:01墩頭勵坦贍抵押架洋戳戒隱最橋西鳳谷侯功亮再熾黍相拄息質慫隨河驕娩肪繳巴儈麻鈴券漿出吏當與晚迪恤柏茨牧琶飾摸撇做延拉律淤洽劣順錦自Now, the Net is an entirely different environment than you'll find within the protected walls of your LAN. Out here, it's the Wild West. Plenty of space, plenty of oppor