ǰ  


     Ժͱ֯

     ǡTCP/IPϵСϵеľ1[Stevens 1994]2[Wright and Stevens 1995]ֳ֣ÿָ˲ͬݡ

     (1) TCPЭ飬ͨT/TCPǶTCPչĿʹͻ-졢Ч͸ɿĿʵʡӿʼʱTCP֣ӽʱTIME_WAIT״̬ĳʱ䡣ǽῴڿͻ-УT/TCPUDP൱T/TCPпɿԺӦԣUDP˵ǺܴĸĽ

     ģһͻ󣬽ǷӦ(ʡ(transaction)ݿеݿезύͻ)

     (2) TCP/IPӦãرHTTP(ıЭ飬WWWĻ)NNTP(ŴЭ飬UsenetϵͳĻ)

     (3) UnixЭ顣ЩЭUnixеTCP/IPʵжṩģUnixʵҲṩЩЭṩ˽֮ͨ(IPC)һֶΣTCP/IPһĲڽӿڡͻͬһʱUnixЭͨҪTCP/IPһ

     һ֣T/TCPĽܣֳַС֡1~4½Э飬˴ʵ˵ġЩҪǶԾ124.7ڵĲ䣬T/TCPֻ˼򵥵Ľܡ2С֣5~12£T/TCP4.4BSD-Lite(2иĴ)еȷʵ֡T/TCPʵֳ19949²ŷѾǱ1һԺˣʱ2ҲˣT/TCPϸʵеʵϸڶֻ÷ڱϵľ3ˡ

     ڶ֣HTTPNNTPӦãǾ1ĵ25~30нTCP/IPӦõھ1InternetķչHTTPõ˼УNNTPʹ10ÿ˴Լ75%T/TCPHTTP˵ҲǷǳõģTCPݴʱ䣬ΪʱӵĽͲʱռʱĴͷڷæWebϣǧͬҲϱ仯ĿͻHTTP(ҲTCP)ĸ߸ʹãҲṩΨһԶԷȷеķпĻ(14)Թ۲1;2иTCP/IPԡ

     еUnixЭԭ׼ھ2нܵģھ2Ѷ1200ҳɾȥˡΪTCP/IP⡷ϵмTCP/IPЭ鲻棬UnixЭ鼸15ǰѾBSDTCP/IPʵ4.2BSDзˡ죬κһӲںжƵʹãǵʹڸں̨û֪ǵĴڡڴӲںг䵱UnixܵĻ⣬ǵһûǵͻͷͬһ(͵ǹվ)ʱX WindowϵͳUnixĲҲڽ֮䴫Ҳǽ֮ͨŵһǿ󹤾ߡUnixЭõĲAPI(Ӧñ̽ӿ)TCP/IPõĲAPIͬģUnixЭСĴ仯ṩһ򵥵ֶǿӦõܡ

     ֵÿֶԶĶ

     

     뱾ϵǰһһΪҪTCP/IPιдģдӦõĳԱάTCP/IPļϵͳԱԼճоTCP/IPӦó򽻵û

     һ͵ڶTCP/IPԭĻϤTCP/IPĶӦÿϵľ1[Stevens 1994]ԱTCP/IPЭ鼯һȫ˽⡣һֵǰ벿(1~4£TCP/IPеĸ)2޹أֱĶ벿(5~12£T/TCPʵ)ҪϤ4.4 BSD-LiteЩھ2нܡ

     дǰοЩοԱ⣬ԼԾ1;2ݣΪҪ˽ϸݵĶṩġڱõױнܵнṹͺ(ĸ˳)ʼҳĽοб˾2еĶ壬ýοбҲг˾2еĶ塣

     ԴȨ

     4.4BSD-LiteԴ(Դ)İȨ˵

     6·ɱԴİȨ˵

     ӡˢ

     ҪʾϢʱúʾ룬Courrier壬ע͡

     ǰϵͳΪͳʾһ(sun)˵ĸִеġõĳͨĸд(TelnetTcpdump)Աʽ

     ⱾУǽһӵע˵ʵϸеʷ׶Ρ

     W. Richard Stevens

     Tucson, Arizona

     199511

     rstevens@noao.edu

     http://www.noao.edu/~rstevens

     

 


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