Forward and Reverse IP Lookups

Cov txheej txheem:

Forward and Reverse IP Lookups
Forward and Reverse IP Lookups
Anonim

Hauv kev sib tham, IP chaw nrhiav yog tus txheej txheem ntawm kev txhais lus ntawm IP chaw nyob thiab cov npe sau npe hauv internet. Forward IP chaw nrhiav hloov lub npe hauv internet mus rau tus IP chaw nyob. Rov qab IP chaw lookup converts tus IP chaw nyob rau lub npe. Rau cov neeg siv computer feem ntau, cov txheej txheem no tshwm sim tom qab qhov xwm txheej.

IP Chaw Nyob yog dab tsi?

Ib qhov chaw nyob hauv internet raws tu qauv (IP chaw nyob) yog tus lej tshwj xeeb uas tau muab rau lub khoos phis tawj xws li khoos phis tawj, smartphone, lossis ntsiav tshuaj txhawm rau txheeb xyuas nws hauv lub network.

IPv4 chaw nyob yog 32-ntsis tus lej thiab muab txog 4 billion tus lej ua tau. Qhov tshiab tshaj plaws ntawm IP raws tu qauv (IPv6) muaj yuav luag tsis muaj qhov txwv tsis pub muaj qhov chaw nyob tshwj xeeb. Piv txwv li, qhov chaw nyob IPv4 zoo li 151.101.65.121; qhov chaw nyob IPv6 zoo li 2001: 4860: 4860:: 8844.

Vim li cas IP chaw nrhiav tshwm sim

Ib tus IP chaw nyob yog ib txoj hlua ntev ntawm cov lej uas nyuaj rau nco ntsoov thiab ua rau muaj kev ua yuam kev. Qhov no yog vim li cas URLs tau siv los mus rau cov vev xaib. URLs tau yooj yim rau kev nco thiab ntaus kom raug. Tom qab qhov xwm txheej, txawm li cas los xij, ib qho URL raug muab txhais ua tus lej IP chaw nyob kom thauj khoom lub vev xaib thov.

Feem ntau, qhov URL (feem ntau hu ua lub vev xaib chaw nyob) tau nkag mus rau hauv lub vev xaib browser ntawm lub khoos phis tawj lossis lub xov tooj ntawm tes. Qhov URL mus rau lub router lossis modem, uas ua haujlwm rau pem hauv ntej lub npe server (DNS) nrhiav siv lub rooj sib tham. Qhov tshwm sim IP chaw nyob txheeb xyuas lub vev xaib. Cov txheej txheem tsis pom rau tus neeg siv, leej twg pom tsuas yog lub vev xaib sib raug rau URL hauv qhov chaw nyob.

Cov neeg siv feem ntau tsis tshua xav tau kev txhawj xeeb nrog rov qab saib IP. Lawv feem ntau siv rau kev daws teeb meem hauv network, feem ntau kom paub cov npe sau npe ntawm tus IP chaw nyob uas ua rau muaj teeb meem.

Nrhiav Kev Pabcuam

Ntau qhov kev pabcuam hauv internet txhawb nqa ob qho tib si rau pem hauv ntej thiab rov qab IP nrhiav rau cov chaw nyob pej xeem. Hauv Is Taws Nem, cov kev pabcuam no vam khom rau ntawm Lub Npe Lub Npe thiab lub npe hu ua DNS lookup thiab thim rov qab DNS saib kev pabcuam.

Image
Image

Nyob hauv ib lub tsev kawm ntawv lossis cov koom haum hauv cheeb tsam network, kev nrhiav tus IP chaw nyob kuj tuaj yeem ua tau. Cov tes hauj lwm no siv cov npe servers sab hauv uas ua haujlwm piv rau cov DNS servers hauv internet

Ntxiv rau DNS, Qhov Kev Pab Cuam Hauv Is Taws Nem yog lwm lub thev naus laus zis uas tuaj yeem siv los tsim cov kev pabcuam saib IP ntawm cov tes hauj lwm ntiag tug.

Lwm Txoj Kev Sau Npe

Ua ntej qhov chaw nyob IP dynamic, ntau lub lag luam me tsis muaj npe servers. Cov tes hauj lwm no tau tswj xyuas tus IP ntiag tug los ntawm cov ntaub ntawv tswv tsev uas muaj cov npe ntawm IP chaw nyob zoo li qub thiab cov npe sib txuas hauv computer. Qhov kev tshawb nrhiav IP no tseem siv tau rau qee lub khoos phis tawj Unix. Nws kuj tseem siv rau hauv tsev network uas tsis muaj routers thiab nrog qhov chaw nyob IP zoo li qub.

Dynamic Host Configuration Protocol (DHCP) cia li tswj tus IP chaw nyob hauv lub network. DHCP-based networks cia siab rau DHCP server kom tswj hwm cov ntaub ntawv. Hauv ntau lub tsev thiab cov lag luam me, lub router yog DHCP server.

A DHCP server lees paub ntau qhov chaw nyob IP, tsis yog ib tus IP chaw nyob. Raws li qhov tshwm sim, tus IP chaw nyob yuav txawv lub sijhawm tom ntej uas URL nkag mus. Siv ntau qhov chaw nyob IP tso cai rau ntau tus neeg tuaj saib lub vev xaib ib txhij.

Cov kev pabcuam siv hluav taws xob tau muab nrog lub khoos phis tawj network ua haujlwm tso cai rau kev saib IP chaw nyob ntawm ob qho tib si LANs thiab hauv internet. Hauv Windows, piv txwv li, cov lus txib nslookup (nkag mus rau hauv Command Prompt window) txhawb kev nrhiav siv lub npe servers thiab host files.

Image
Image

Cov lus txib yog tib yam rau macOS thiab nkag mus rau hauv lub qhov rais Terminal.

Image
Image

Public nslookup sites hauv internet suav nrog Kloth.net, Network-Tools.com, thiab CentralOps.net.

Pom zoo: