subdomain email address

DNS Subdomain Authorization:Here we only show the subdomain authorization for forward parsingThe parent domain is able to parse the a record of the subdomain (not authoritative, because it is not self-parsing),The subdomain cannot resolve the A

Author: syd168 15:09:18 from: Mr. Linux I. Basic DNS knowledgeAs we all know, in network communication, data links Use MAC addresses. The network layer uses IP addresses, and the transport layer uses port numbers,

DNS Subdomain authorizationRole: Applies to the same DNS organizationThe resolution of the parent/child domain is handled by a different DNS serverThe parent DNS server should have the ability to iterate over the sub-domain nameSubordinate

Subdomain authorization: In fact, a larger domain is divided into small areas, each small area can be managed by a group or groups of servers, these servers only resolve domain names within their jurisdiction, resolution requests beyond their scope

A recordThe A (Address) record is used to specify the IP address record corresponding to the Host Name (or domain name. You can direct the website server under this domain name to your web server. You can also set a subdomain name for your domain

A record Quote:The A (Address) record is used to specify the IP address record corresponding to the Host Name (or domain name. You can direct the website server under this domain name to your web server. You can also set a subdomain name for your

I. PrefaceIi. Basic Knowledge1. What is an IP address?2. What is a fixed IP address?3. What is a dynamic IP address?4. What is a domain name? What makes a domain name?5. What are subdomain names and second-level domain names?6. What is DNS?7. What

Php verification email address class (Classic) Share a php class to verify the email address. generally, we will verify it through js regular expressions. the code we share here is implemented using native php. if you need it, refer to

Jquery practice case -- verify email address and jquery case   Let's take a look at all the mailboxes:   It is obviously impossible for us to make judgments by email address.  -A complete Internet email address consists of the following two parts:

1. Cross-domain and cross-server solutionsThe session is divided into two main parts:One is session data, which is stored in the server's TMP file by default, and is in the form of a fileThe other is the session Id,session ID that indicates session