What is domain name resolution?
Domain name resolution is a conversion process from domain name to IP address. Domain name is a set of address translation system specially established to facilitate everyone's memory. Users who want to access the server on the Internet must eventually use the IP address. Domain name resolution is the process of converting domain names to IP addresses. Domain name resolution is completed by an intelligent DNS server
What is domain name resolution?
What is IP reverse resolution?
The server and the domain name system have two zones, namely "forward lookup zone" and "reverse lookup zone". The forward lookup zone is the domain name resolution mentioned by Bian Xiao, and the reverse lookup zone is the IP reverse resolution. Its function is to obtain the domain name pointed by the IP address by querying the PTR record. Of course, the PTR record of the IP address is necessary to successfully obtain the domain name.
PTR record is a kind of mail exchange record, including A record and PTR record. The record resolves the name to the address, while the PTR record resolves the address to the name. Address refers to the IP address of the client, and name refers to the fully qualified domain name of the client. The purpose of reverse query is achieved by querying PTR records, which is why you can find the domain name Whois information through the IP address.
A What is the record?
(Address) record is used to specify the IP address record corresponding to the host name (or domain name). Users can point the server website under the domain name to their own network server. At the same time, you can also set the secondary domain name of your own domain name.
What are MX records?
Mail routing records. Users can point the mail server under the domain name to their own mail server, and then control all mailbox settings themselves. You only need to fill in the online IP address of your server, and then you can transfer all the mail under your domain name to the corresponding server mail set by yourself.
The function of the reverse domain name resolution system (ReverseDNS) ensures that correct mail exchange records are valid. This is the most common problem (especially in foreign mail systems). More email providers use reverse domain name resolution systems to find the source of information.
Due to the widespread use of this method, domains that do not correctly publish reverse domain name resolution system information may have more frequent mail returns. Therefore, while completing the forward domain name resolution, you should also apply for reverse address resolution from your line access provider (ISP), especially foreign enterprise emails, to reduce the possibility of rejection by foreign institutions.
The reverse domain name resolution verification is actually performed by the server of the other party. If we do not do reverse resolution, the reverse resolution verification of the server of the other party will fail, so the server of the other party will reject the email sent by us because we are unknown senders. This is why, after excluding other reasons (such as being blacklisted by the other party, having no MX record, using a dynamic IP address, etc.), we cannot send letters to the mail server without reverse resolution
I believe you should Neutrino network 'I have a general understanding of domain name resolution after the small series, so I hope you can remember Register domain name The following domain name resolution.
