Qhov Sib txawv ntawm Rov Qab Saib Zej Zog thiab Forward Lookup Zone

Qhov Sib txawv ntawm Rov Qab Saib Zej Zog thiab Forward Lookup Zone
Qhov Sib txawv ntawm Rov Qab Saib Zej Zog thiab Forward Lookup Zone

Video: Qhov Sib txawv ntawm Rov Qab Saib Zej Zog thiab Forward Lookup Zone

Video: Qhov Sib txawv ntawm Rov Qab Saib Zej Zog thiab Forward Lookup Zone
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Reverse Lookup Zone vs Forward Lookup Zone

Domain Name System (DNS) yog lub npe hu ua lub npe uas siv los ntawm txhua qhov chaw txuas nrog hauv internet. DNS txhais cov npe sau npe, uas muaj txiaj ntsig zoo rau tib neeg, hauv IP chaw nyob cuam tshuam nrog cov peev txheej hauv internet los nrhiav lawv thoob plaws ntiaj teb. Txhua zaus siv IP chaw nyob, DNS txhais lub npe rau hauv tus IP chaw nyob. Forward lookup cheeb tsam tuav lub npe tswv rau IP chaw nyob sib raug zoo. Thaum lub khoos phis tawj thov qhov chaw nyob IP rau ib lub npe tswv tsev tshwj xeeb, thaj chaw saib pem hauv ntej tau nug kom tau txais qhov tshwm sim. Ntawm qhov tod tes, Rov qab saib thaj chaw muaj qhov chaw nyob IP los tuav lub npe kos npe. Thaum lub khoos phis tawj thov lub npe tswv tsev rau qhov chaw nyob IP tshwj xeeb, qhov chaw rov qab saib yog nug kom tau cov lus teb.

Zoo saib pem hauv ntej yog dab tsi?

Thaj chaw saib pem hauv ntej muaj daim ntawv qhia nruab nrab ntawm cov npe tswv thiab IP chaw nyob. Thaum lub khoos phis tawj thov qhov chaw nyob IP los ntawm kev muab lub npe tswv tsev (uas yog tus neeg siv ntau tus phooj ywg), thaj chaw saib rau pem hauv ntej yog nug kom pom tus IP chaw nyob rau lub npe tswv tsev. Piv txwv li, thaum koj ntaus www.cnn.com hauv koj tus browser, thaj chaw saib tom ntej yuav raug nug thiab tus IP chaw nyob 157.166.255.19 yuav raug xa rov qab, uas yog qhov chaw nyob IP ntawm qhov chaw ntawd. Thaum ib qho kev saib rau pem hauv ntej raug xa mus rau DNS server, DNS server tshawb nrhiav ib hom ntaub ntawv khaws tseg cuam tshuam nrog tus tswv lub npe muab los ntawm kev thov. Ib hom peev txheej yog cov ntaub ntawv DNS uas tuaj yeem siv los taw qhia lub npe sau npe thiab cov npe tswv tsev rau qhov chaw nyob IP zoo li qub. Yog tias tus neeg rau zaub mov DNS pom qhov sib piv A hom ntaub ntawv, nws yuav rov qab mus rau tus neeg siv khoom, nws yuav xa cov lus nug mus rau lwm tus DNS server.

Zoo saib rov qab yog dab tsi?

Rov qab saib thaj chaw muaj daim ntawv qhia uas cuam tshuam IP chaw nyob rau cov npe tswv. Thaum lub khoos phis tawj thov rau lub npe sau los ntawm kev muab tus IP chaw nyob, qhov chaw rov qab saib yog nug kom pom tus tswv lub npe rau qhov chaw nyob IP muab. Piv txwv li, yog tias tus neeg siv xav nrhiav tus tswv lub npe rau tus IP chaw nyob 157.166.255.19, qhov chaw rov qab saib yuav raug nug thiab nws yuav xa rov qab tus tswv lub npe www.cnn.com. Qhov rov qab saib tsam muaj PTR cov ntaub ntawv khaws tseg. PTR cov ntaub ntawv tso cai ua qhov rov qab saib los ntawm taw qhia tus IP chaw nyob rau tus tswv tsev / lub npe sau npe. Thaum ua qhov rov qab saib, cov ntaub ntawv PTR no tau siv los taw rau Cov ntaub ntawv khaws tseg.

Dab tsi yog qhov txawv ntawm Reverse Lookup Zone thiab Forward Lookup Zone?

Qhov sib txawv tseem ceeb ntawm thaj chaw saib pem hauv ntej thiab qhov chaw rov qab saib yog qhov chaw saib xyuas pem hauv ntej yog siv los daws cov lus nug yav tom ntej uas tus neeg siv thov tus IP chaw nyob los ntawm kev muab tus tswv lub npe, thaum rov qab saib tsam yog siv los daws qhov rov qab. nrhiav cov lus nug uas tus neeg siv khoom thov lub npe tswv los ntawm kev muab tus IP chaw nyob. Thaj chaw saib rau pem hauv ntej muaj Ib hom ntaub ntawv cov ntaub ntawv uas tuaj yeem taw qhia qhov chaw nyob IP rau lub npe tswv tsev. Qhov rov qab saib thaj tsam muaj PTR cov ntaub ntawv uas tuaj yeem taw qhia tus tswv lub npe rau qhov chaw nyob IP muab.

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