http___www.test-net.org_bs_faq_reverse-lookup-tool__1.xml
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Reverse lookup is a network service used to determinate a domain name that is associated with a given IP address using the Domain Name System (DNS) of the Internet. It takes the form of a question, such as “Can you tell me the DNS name of the computer that uses the IP address 192.168.1.1?” One problem for supporting the reverse query process is the difference in how the DNS namespace organizes and indexes names and how IP addresses are assigned. If the only method to answer the previous question was to search in all domains in the DNS namespace, a reverse query would take too long and require too much processing to be useful. To solve this problem, a special domain, the in-addr.arpa domain, was defined in the DNS standards and reserved in the Internet DNS namespace to provide a practical and reliable way to perform reverse queries. To create the reverse namespace, subdomains within the in-addr.arpa domain are formed using the reverse ordering of the numbers in the dotted-decimal notation of IP addresses. This reversed ordering of the domains for each octet value is needed because, unlike DNS names, when IP addresses are read from left to right, they are interpreted in the opposite manner. When an IP address is read from left to right, it is viewed from its most generalized information (an IP network address) in the first part of the address to the more specific information (an IP host address) contained in the last octets. For this reason, the order of IP address octets must be reversed when building the in-addr.arpa domain tree. The IP addresses of the DNS in-addr.arpa tree can be delegated to companies as they are assigned a specific or limited set of IP addresses within the Internet-defined address classes. Til slutt, the in-addr.arpa domain tree, as built into DNS, requires that an additional resource record (RR) type the pointer (PTR) RR be defined. This RR is used to create a mapping in the reverse lookup zone that typically corresponds to a host (En) named RR for the DNS computer name of a host in its forward lookup zone. Vennligst sjekk denne flotte tjenesten på: http://www.test-net.org/services/bandwidth-meter/ eller gå GRATIS TJENESTER-menyen
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Obrnuti pretragu je mreža službe koristio određivanje domena ime koje je povezan s obzirom IP adresu koristeći Domenu Ime Sustav (DNS) Internet. To uzima oblik pitanje, kao što su “Možete li mi reći DNS ime kompjuter koji koriste IP adrese 192.168.1.1?” Jedan problem za podršku obrnuto upit proces je razlika kako DNS imenskim prostorom organizuje i indeksa imena i kako IP adrese su dodijelili. Ako je jedini način da odgovoriš na prethodne pitanje je da potrazi u sve domena u DNS imenskim prostorom, obrnuta upit bi trajalo predugo i potrebna previše obradu biti koristan. Da riješim ovaj problem, specijalni domena, u addr.arpa domena, je definisana u DNS standardima i rezervirano na Internetu DNS imenskim prostorom osigurati praktične i pouzdan način da se izvede obrnuti upita. Da stvori obrnuti imenskim prostorom, subdomains unutar u-addr.arpa domena su formirani koristeći obrnuto naručivanja brojeve na dnu-decimalni prvi IP adrese. Ovo obrnuto naručio iz domene za svaki octet vrijednost je trebao zbog, za razliku od DNS imena, kada IP adrese su čitati s lijeva na desno, oni su protumačili u suprotnom način. Kada IP adresa je pročitati s lijeva na desno, to se gleda iz svoje većina sistematski informacije (IP adresu mreža) u prvom dijelu adresa određeniji informacije (IP adresu domaćin) sadržane u zadnji octets. Ovo je razlog zbog kojeg, red IP adresu octets mora biti obrnuto kada zgrade u addr.arpa domena drvo. IP adrese DNS-addr.arpa drvo mogu povjeriti da kompanija kao i oni dobijaju posebne ili ograničen set IP adrese u Internet definisanim adresu časove. Konačno, u addr.arpa domena drvo, kao ugrađen u DNS, zahtijeva da dodatnih resursa rekord (RR) type the pointer (PTR) RR definišu. Ovo RR je nekad napravi mapiranje u rikverc pretragu zoni to obično odgovara domaćin (Jedna) zove RR za DNS kompjuter ime domaćin u svom naprijed pretragu zoni. Molim te, provjeri ovo je sjajna u službi: http://www.test-net.org/services/unit-converter/ ili posjetim BESPLATNO USLUGA meni