Yuav Ua Li Cas Ua Tus IP Chaw Tsim Nyog

Los ntawm Peter Pollock

Rau Is Taws Nem kom muaj peev xwm muab IP chaw nyob ntawm tus neeg rau zaub mov qhia kiag uas koj xav tau txuas rau txhawm rau txhawm rau mus saib lub vev xaib koj xav tau, koj yuav tsum muab qhov chaw nyob ua tiav website. Qhov no hu ua a Txhim Kho Lub Npe Tsis Muaj Npe (FQ D N) Cov.



koj puas tuaj yeem noj meloxicam thiab ibuprofen ua ke?

FQDN yog muaj ntawm peb ntu:



  • Ib lub hostname

  • Tus sau lub npe



  • Txuas ntxiv mus, uas tseem muaj npe hu ua Top-Level Domain (TLD)

Piv txwv li, sau www.dummies.com muaj cov hauv qab no:

  • Tus hostname yogwwwCov.



  • Tus sau lub npe yogdummiesCov.

  • Qhov TLD yog.withCov.

Thaum tshawb xyuas lub vev xaib koj lub computer nyeem qhov chaw nyob ntawm sab xis rau sab laug - thiab qhov no yog vim li cas:

Cov hauv paus ntawm kev tsim Is Taws Nem yog cov teeb tsa ntawm cov npe hu ua Is Taws Nem Qib Lub Npe Servers. Muaj 13 lub hauv paus nameservers thiab lawv muaj txoj haujlwm tseem ceeb: Hauv paus nameservers xa cov ntaub ntawv me me rau txhua lub computer uas thov nws.

Lub Hauv Paus Tsam Cov Ntaub Ntawv muaj IP chaw nyob ntawm lwm cov teeb tsa hu ua TLD nameservers. Muaj qee tus lej ntawm TLD, feem ntau ntawm cov hauv qab no yog:

  • Lub teb chaws-Code Cov lus Theem Siab (ccTLD): Cov no yog suav nrog ob tsab ntawv dhau los ntawm ib teev thiab lawv tau lees paub thoob ntiaj teb raws li cov cai rau ib lub tebchaws tshwj xeeb. Cov no tau tsim los ntawm International Organisation rau Standardization (ISO) thiab muaj npe hu ua ISO 3166 cov lis dej num.

  • Internationalized Top-Theem Thawj (IDN TLD): Cov no yog ccTLDs hauv cov kab-ntawv Latin cov qauv.

  • Sab saum toj-theem thawj (gTLD): Cov thawj thaj chaw feem ntau suav nrog peb tus tsiaj ntawv ua ntej los ntawm lub teev (piv txwv,.with,.org, thiab.nawb), tab sis yuav muaj ntau ntxiv.

Txhua nyias TLD nws muaj nws Tus Ntawv Tso Npe Nameserver nrog nws tus kheej tus IP chaw nyob. Cov lus txhais yooj yim tshaj plaws ntawm nameserver yog server uas tuav cov npe ntawm cov npe sau mapped rau IP chaw nyob ntawm cov servers cov sau npe nyob rau.

Lub Sijhawm Tso Cai Nameserver txhais qhov server ua ib qho uas yog khaws cia feem ntau hloov kho. Koj tuaj yeem muaj cov npe nameservers theem nrab, uas tuav ib daim ntawv theej ntawm cov ntaub ntawv los ntawm Tus Ntawv Tso Cai Nameservers, tab sis yog tias muaj qee qhov tsis sib xws, tus neeg rau lub cim tso cai raug kho raws li qhov muaj tseeb. Txoj Cai yog txhais los ntawm Pib Ntaub Ntawv (SOA).

Yog li, piv txwv li, Tus Kws Tshaj Lij Tshaj Tawm rau TLD.withtuav ib daim npe ntawm txhua tus.withsau npe thiab lawv cov chaw nyob IP, nameserver rau TLD.orgtuav ib daim npe ntawm txhua tus.orgsau npe, thiab li ntawd.

kev ntxhov siab vim kev noj tshuaj

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Thaum koj ntaus FQDN rau hauv koj lub browser - piv txwv, www.google.com - koj tus browser mus rau DNS server thiab nug seb nws puas paub tus IP chaw nyob ntawm www.google.com Cov. Yog tias DNS server tsis paub qhov chaw nyob ces koj tus browser thov a recursive tshawb , uas txhais tau tias DNS server yuav tsum tshawb txhua qhov peev xwm nws tuaj yeem siv tau cov lus teb thiab rov los nrog qhov chaw nyob lossis xov xwm tsis ua tiav.

Tus DNS server ces pib tus kuv kev tshawb nrhiav pom , uas mus ib me ntsis tej yam zoo li no:

Ua ntej nws mus rau Lub Hauv Paus Npe Lub Npe thiab nug, Koj puas paub qhov twg kuv tuaj yeem nrhiav tau www.google.com ? Yog tias tsis yog, koj puas tuaj yeem qhia qhov twg kuv yuav tsum saib? Tus cag lub npe Server hais tias, Tsis yog, tab sis kuv paub qhov twg.withserver yog; mus nug tus.withneeg rau zaub mov. Nws mam li muab cov khoom siv DNS nrog lub chaw nyob IP ntawm.withneeg rau zaub mov.

Qhov DNS server ces mus rau qhov no.withnameserver thiab hais tias, Koj puas paub qhov twg kuv yuav nrhiav tau www.google.com ? Yog tias tsis yog, koj puas tuaj yeem qhia qhov twg kuv yuav tsum saib? Tus.withserver teb, Tsis yog, tab sis kuv paub qhov twg lubGoogle comserver yog. Nws tom qab ntawd xa cov DNS server mus rau Lub Npe Tso Cai Nameserver rauGoogle comCov.

Thaum twg DNS neeg rau zaub mov nug covGoogle comnameserver, DNS server ua ntej kuaj xyuas tias nameserver yog tus sau rau sau, thiab, yog tias nws yog, nug, Koj puas paub qhov twg kuv tuaj yeem nrhiav tau www.google.com ? Yog tias tsis yog, koj puas tuaj yeem qhia qhov twg kuv yuav tsum saib? TusGoogle comnameserver xyuas nws cov cheeb tsam cov ntaub ntawv rau tus tswv tsev ntawd thiab rov qab qhov chaw nyob IP lossis qhia rau DNS server tus hostname tsis muaj nyob.

ntau npaum li cas amoxicillin rau tus dev

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Txhawm rau kom lub npe tsim nyog nws yuav tsum muaj lwm qhov ntxiv ua ntej sau npe, xws liwww., uas yog tus hostname Cov.

Vim tias txoj kev ntawm DNS ua haujlwm, qhov khoom sib txuas ntxiv no, tus tswv tsev saib xyuas yog qhov tseem ceeb. Feem ntau, los ntawm lub neej ntawd, yog tias koj ntaus lub npe sau rau hauv browser thiab tsis suav nrog lub hostname, nws yuav xav tias lub npe ua tsis raug hostname ntawmwwwCov.

Tus Thawj Saib Xyuas Nameserver rau tus sau tuav ib qho kev ntsuas ntawm txhua tus hostnames tau teeb tsa rau qhov ntawd thiab tus IP chaw nyob uas cov hostnames nrhiav pom, hu ua DNS tsam File. Txoj kev uas feem ntau ntawm cov vev xaib tau teeb tsa, tus neeg rau zaub mov uas ua tau lub tsev lub npe kuj tseem ua lub nameserver.

Qhov no tsuas yog ua kom yooj yim thiab them nqi, tab sis nws tsis yog qhov kev xav tau tshaj plaws los ua txhua yam.

Lub zog rov qab yog qhov tseem ceeb ntawm kev txuas ntxiv mus txuas ntxiv ntawm Is Taws Nem thiab yog li, txhua txoj kev dhau los ntawm cov txheej txheem no, ntau cov servers yog qhov ua si. Yog tias ib lossis ob qho tau nqes mus rau hauv qee qhov laj thawj, ntau txaus yuav cia koj tus browser tuaj yeem pom.

Nyob rau txhua theem ntawm kev tshawb nrhiav iterative yog tias DNS server tshem tawm cov IP chaw nyob uas nws tau muab, thiab tom qab ntawd nws rov ua yuam kev thiab koj tus browser qhia cov lus yuam kev ntawd. Lub sheer loj ntawm cov txheej txheem nyob tom qab Internet Hauv Nameservers thiab TLD servers ua rau nws tsis zoo li tias koj lub browser lossis lub DNS server yuav tsis poob ib qho ntawm lawv.

Feem ntau yog tias ib qho xov xwm yuam kev tshwm sim, nws yog ib qho vim tias Tus Neeg Sau Qhia Nameserver rau tus sau tsis tuaj yeem pom lossis vim tias qhov chaw nyob IP ntawm Tus Ntawv Tso Cai Nameserver tau hais tias lub vev xaib tsis raug.