Cov Kev Pabcuam Tseem Ceeb ntawm Internet
Internet tau tsim ntev ua ntej peb tau pom nws lawm. Niaj hnub no peb tsis muaj peev xwm xav txog lub neej tsis muaj nws. Peb txoj kev ntawm lub neej cia siab rau cov kev pabcuam hauv web tab txawm tias peb tsis muaj lub PC. Nws nyuaj rau pom tau lub neej tsis muaj internet vim nws tsis yooj yim xav txog lub neej tsis muaj hluav taws xob peb xyoo dhau los.
Internet yog tiag tiag thoob ntiaj teb, network tsuas yog. Qhov kev pab yog dab tsi pub rau peb xa xov los yog los ua kom khiav. Muaj ntau cov neeg ntseeg hais tias internet yog WWW (World Wide Web) thiab lwm txoj kev. Qhov tseeb, WWW tsuas yog ib qho nrog cov kev pabcuam uas muaj nyob hauv internet. Cov kev pabcuam hauv internet xws li ISP (Internet provider), Email, WWW thiab Spam.
ISP
Yog li ntawd koj tuaj yeem txuas rau hauv lub vas sab koj yuav tsum muaj daim ntawv cog lus los ntawm kev siv ISP. Kev nkag mus rau hauv internet yuav ua tau nyob rau hauv cov xov tooj analog, ISDN (Cov Kev Pab Cov Kev Pab Digital), ntau yam xDSL (x Digital Subscriber Line) technologies, FTTH (fiber ntau hauv tsev), wireless networks, cable network, thiab lwm yam. sib txawv tab sis nws 's tsis nquag tau 100 Mbit \ / s li zoo li 1 Gbit \ / s ntawm FTTH. Tsis hais txog qhov kev sib txuas ceev, kev siv internet yog qhov tseem ceeb heev.
Email
Xa cov lus tshaj tawm hauv xov tooj yog ntawm cov kev pabcuam tsis zoo hauv internet. Yog li ntawd koj tuaj yeem xa thiab tau txais cov lus koj yuav tsum muaj tsawg kawg yog ob lub xa neeg xa ntawv, ib qho rau xa thiab ib qho rau kev nrhiav cov lus. Txij li email chaw nyob yog tiag tiag ib qho yuav tsum tau ua rau yuav luag txhua lub lag luam, tsis yog hauv online, txhua lub tuam txhab muaj tsawg kawg yog ib tus neeg xa ntawv. Zoo hmoo muaj ntau ntau cov chaw xa email dawb. Ib qho ntawm nrov tshaj plaws thiab nto moo yog Gmail, dawb email los ntawm Google. Tsis muaj tus Gmail tus account koj raug mob ntau heev.
WWW
Tej zaum WWW yog qhov feem ntau siv cov websites. Qhov no tej zaum yuav yog vim li cas ho txhais tau tias www yog txhais tau tias zoo nkaus li internet rau ntau tus neeg. Siv qhov homepage yog ib qho yuav tsum tau ua. Tsis yog rau tuam txhab lag luam tiam sis ntxiv rau cov zej zog, cov koom haum, cov koom haum thiab cov tib neeg. Sau koj lub blog yog nrov heev hnub no. Vim tias cov chaw no muaj kev sib txig sib luag ntawm cov neeg muab kev pab hauv internet. Cov nqi qis, tsim kom muaj ib lub website yog yooj yim zoo nkauj thiab yuav luag txhua tus muaj peev xwm muaj nws lub website.
Spam
Spam tsis yog kev pabcuam hauv online tiam sis nws yog ib qhov kev tshawb fawb ntawm cov nqi pheej yig lossis txawm tias dawb hauv internet. Nws yooj yim heev los tsim kev sib tham thiab xa mus rau txhua qhov chaw nyob. Thiab xa nws yog dab tsi tag nrho rau ib qho zoo kawg xov tooj ntawm cov ntaub ntawv sib cuag hauv ntiaj teb no tsis muaj qhov sib txawv. Email spam yog teeb meem loj. Muaj ntau lub lag luam uas muag anti-spam khoom lossis cov kev pabcuam. Ib qho zoo heev pov thawj anti-spam siv los ntawm Gmail. Koj yuav tsis tshua tau email. Tus spam loj hauv internet. Muaj ntau ntau cov nplooj ntawv tsis muaj cov ntsiab lus tseem ceeb. Thaum koj tab tom sim nrhiav ib yam dab tsi nws yog qhov koj yuav pom zoo li cov nplooj ntawv.
Ntawm chav kawm, tseem muaj lwm yam kev pabcuam rau hauv internet. Xa IP packets yog yooj yim txhua tus niaj hnub siv lossis cov khoom siv tshuab electronics yog ib qho txuas ntawm ethernet. Tsis txhob xav tsis thoob txog kev sib txuas lus hauv internet.
fiber network daws hauv FOCC, ib qho loj tshaj plaws fiber ntau optic cable supplier. Raws li fiber optics ua si lub luag haujlwm tseem ceeb hauv Internet Networks tam sim no, peb sim ua kom zoo tshaj plaws los muab cov khoom zoo fiber ntau optic kom tau raws li lub khw xav tau.