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第 4 章 计算机网络中的高层应用
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Transcript of 第 4 章 计算机网络中的高层应用
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4 /
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4.1 DNSDomain Name System 12IP3IP
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1
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2 jackjack.acm.orgacm.orgjack
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63255NICNICCNNICwww.cnnic.net.cn
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CCNIC
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E-mailE-mailE-mail""
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20024
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20021-4
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CCNIC
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P1584-5
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123
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DNSflits.cs.vu.nllinda.cs.yale.eduIP
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8
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cs.vn.nlUDPedu
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edulinda.cs.yale.educs.yale.eduyale.eduyale.educs.yale.edulinda.cs.yale.educs.yale.edu
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Windows 95/98/NTTCP/IPDNSDNSP161 4-7
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CPUSunUNIXSolarisBind
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1named.confnamed/etc2named.ca3named.hostsnamed.revnamed.local4in.namednslookup
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/21234.2
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12TCP/IPUNIXWindows NTLinuxNovell NetWare
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3C/SWWWFTP4
P171 4-9P172 4-10
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LAN123456WAN
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Electronic mail 4.3 E-mail
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OutlookTCPIPSMTPPOP IMAP
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1SMTPSample Mail Transfer Protocol
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2 POP3Post Office Protocol
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OutlookPOP3SMTP
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POP3SMTP
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IMAPInternet Message Access ProtocolPC
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1header2body
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1P175Outlook Express
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123
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ReceivedDateFromToSubjectX-mailerMime-VersionContent-TypeMessage-Id
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1hyper textlinkancorlinkancor 4.4 WWW
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2HTTPHyper Text Transport ProtocolWWWWWWHTTPTCP http://www.jmtvu.net
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3URLUniform Resource LocationURL: http://www.jmtvu.net/pweb/lb/index.asp: //://
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4HTML,TagHTML
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HTML Word FrontPage Dreamweaver
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HTMLHTML
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:H1H6
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5WWWHTMLIE 5.0Commaunicator 4.0
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WWW1WWW2WWW3HTTP
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InternetWebabc.comWebxyz.comHTTPTCPHTTPHTTP
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:WWWURLhttp://www.jmtvu.net/pweb/lb/index.html1URL2DNSwww.jmtvu.netIP3DNS172.16.0.14172.16.0.180TCPTCP
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5WWWGET /pweb/lb/index.htmlHTTP6 www.jmtvu.netindex.html7TCP8index.html9index.html
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Internet Explorer Internet Explorer1Web2 3InternetInternet Explorer
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3
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123Word
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123
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Internet12InternetInternet
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4567
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Internet
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Yahoo1
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2
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3
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4.5 FTPTelnet Telecommunication network protocol1TCP/IPInternet
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2Telnet TelnetTelnet TelnetTCP/IP InternetIP UserID
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Telnet TCP TCP
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Telnet TCP
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3telnettelnet
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12Internet3Telnet4
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File Transfer Protocol1
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TCP/IPdownload upload
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2/C/SClientServerFTPTCPFTP21
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FTPTCP/IP
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FTPFTP
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FTPTCPControl ConnectionFTPData Connection
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3 FTP FTP FTP
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4.6 BBS123
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USENETInternetInternetUsenet,Internet,Newsgroup,InternetInternetUsenet,Netscape,Usenet
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USENETUsers networkUSENETUSENETOutlook ExpressP146-148
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IRCICQ 1WebchatHTML
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2OICQOICQInternetOpenICQOICQOICQNextOICQ
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2OICQOICQInternetOpenICQOICQOICQNextOICQ
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:http://www.hongen.com/pc/tools/nettool/chat/oicq/oicq0101.htm
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3(NetEase)http://popo.163.com
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IPhone1IPIPTCP/IPUDPUDP
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2IPPCPCInternetIPhoneVoxPhoneNetMeetingMediaring TalkCool TalkPCPCIPNet2PhoneIPhone
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IPIP17951+
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3IPVoxPhonehttp://www.voxware.comNet2Phonehttp://www.net2phone.com.cnIPhone5http://www.xjh.com.cn/xiazaizhuangqu.htm
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VODMPEG
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MPEGMoving Picture Expert Group1988MPEG-1MPEG-2VCDDVDMPEG-4MPEG-7MPEG-21
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VR
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P248-2491~46~8 4