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Which DNS component was introduced to eliminate the large amount of processing time required to perform reverse lookups?
in-addr.arpa domain
What are some websites offering a reverse DNS lookup service?
In computer networking, reverse DNS lookup or reverse DNS resolution is the determination of a domain name that is associated with given IP adress using DNS of the internet.
What DNS component was introduced to eliminate the large amount of processing time required to perform reverse lookups?
in-addr.arpa domain Before reverse lookups were introduced, DNS needed to search all the domains in the DNS namespace to identify the hostname corresponding to an IP address. This took a large amount of processing time. To overcome this problem, the in-addr.arpa domain was created, which contains the required DNS records for reverse lookups. The in-addr.arpa domain is a reserved Internet DNS namespace.
What does reverse DNS lookup mean?
Reverse DNS lookup means one is trying to find the domain name associated with a particular IP address. Forward DNS lookup means one is trying to find the IP address associated with a domain name.
What can one do to resolve a dns?
One looking to resolve their DNS issues should enable reverse look-ups on their DNS server. Next, one should check for duplicate records on their DNS server. Finally, one should compare the records on their DNS server and make the necessary changes.
Which types of DNS zone records are listed in the reverse lookup zone file?
n most DNS lookups, clients typically perform a forward lookup, which is a search based on the DNS name of another computer as stored in an address (A) resource record. This type of query expects an IP address as the resource data for the answered response. DNS also provides a reverse lookup process, enabling clients to use a known IP address during a name query and look up a computer name based on its address. A reverse lookup takes the form of a question, such as "Can you tell me the DNS name of the computer that uses the IP address 192.168.1.20?" DNS was not originally designed to support this type of query. 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. Finally, 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 (A) named RR for the DNS computer name of a host in its forward lookup zone.
What type of DNS zone is used to resolve and IP address to a host name?
The type of DNS zone used to resolve an IP address to a host name is called a Reverse DNS zone. This zone uses PTR (Pointer) records to map an IP address back to its corresponding domain name. Reverse DNS lookups are often used for logging, verification, and security purposes.
Which DNS zone resolves an ip address to a qualified domain name?
reverse lookup
When a DNS server retrieves the host name associated with an IP address what type of look up is it accomplishing?
When a DNS server retrieves the host name associated with an IP address, it is performing a reverse DNS lookup. This process involves querying the DNS database to find the corresponding domain name for a given IP address, typically using a special domain structure that includes the IP address in reverse order. Reverse lookups are often used for various purposes, such as network troubleshooting and security verification.
Which dns zone resolves an ip address to q qualified domain name?
reverse lookup
How exactly does DNS PTR work?
PTR is an abbreviation for pointer record. This pointer record is often used to do a reverse DNS search. DNS means DOMAIN NAME SYSTEM. These searches are done in order to figure out someone's IP address.
What process is used when it is necessary for a computer to convert an IP address into a DNS name?
Reverse name resolution
