what is primary dns

domain, Another request to the IP address of the COM domain (what is the IP address of this domain name www.linux178.com?), COM domain This server tells the operator of the DNS I do not know www.linux178.com the IP address of this domain name, but I know linux178.com this domain DNS address, you go to find it, so the

carrier's DNS I do not know the IP address of this domain name, but I know the IP address of the COM domain, you go to find it, so the operator's DNS to get the IP address of the COM domain, Another request to the IP address of the COM domain (what is the IP address of this domain name www.linux178.com?), COM domain T

HTTP protocolFor the HTTP protocol, refer to the following:HTTP协议漫谈 http://kb.cnblogs.com/page/140611/HTTP协议概览 http://www.cnblogs.com/vamei/archive/2013/05/11/3069788.html了解HTTP Headers的方方面面 http://kb.cnblogs.com/page/55442/When we enter www.linux178.com in the address bar of the browser, and then go to enter, enter this moment to see what happened to the page?Domain name resolution--Initiates a TCP 3 handshake--initiates an HTTP request after the TC

find it, so the operator's DNS got the COM domain IP address, Also launched a request to the IP address of the COM domain (what is the IP address of www.linux178.com This domain name, please?), COM domain This server tells the operator DNS I don't know www.linux178.com this domain IP address, but I know linux178.com t

What is a domain name? Domain name is the unique name of the site, such as Microsoft.com and jb51.net. Registration is required for registration. When a domain name is registered, it is added to a large domain registrar, alo

the domain name resolution file hosts what files. What's the effect? 1. Speed up Domain name resolutionFor Web sites to visit frequently, we can configure the domain name and IP mapping relationships in hosts so that when we enter a domain name computer, we can quickly resolve IP without requesting a DNS server on the network.2. Easy LAN UsersIn many units of the local area network, there will be a serve

response speed. ----for a better understanding of CDN, let's look at the workflow of Cdn. When a user accesses a Web site that has already joined CDN Services, it first determines the best CDN node of the nearest user through DNS redirection technology, and points the user's request to the node. When the user's request arrives at the specified node, the CDN server (the cache on the node) is responsible for

Effectively optimize the performance of the VPS, improve the running speed of the VPS server, in addition to a reasonable configuration of the Web server, more is the need for us to be able to optimize the Web site procedures and website database, the optimization of the site database is the most basic optimization measures is to establish the database index, her

When operating the Oracle view through DML, a very important condition is that the base table to be operated must be a key-preserved table.So what is the key-preserved table? Oracle defines it:A table is key preserved if every key of the table can also be a key of the result of the join.It

data. What do you mean you don't have to elaborate, before this, a lot of people sprayed the dung ef, that is, his update efficiency is too low, if you want to implement batch update, especially when inserting, need to use SQL statement or third-party tool class. Believe that this is the function that many people expe

-level domain exactly the same function1. Level two domain name is the domain name of the primary domain.2. Level two domain name is the domain name that is hosted under the primary domain name, the weight is lower than the

anything is the same, from primary school, middle School, university, in addition to learning knowledge is to learn methods! To learn the standardized layout of Web pages, we must first discard the traditional table layout of the form of fixed thinking, with div layout, starting from the content. and must have a good understanding of HTML tags, at least see how

This article is reproduced from Wang Gen blog, source address: HTTP://WWW.YINWANG.ORG/BLOG-CN/2017/07/06/MASTER-PL, although Wang Gen is a controversial person, this article some places also write some arrogant, However, this article is very good, I am the same view of programming, language is only second, learning to

SSH project, what is the difference between using gethibernatetemplate and getsession? What are the pros and cons, thanks for the answer!Reward Points: 0-resolution Time: 2008-10-7 09:42SSH project, what is the difference between using gethibernatetemplate and getsession?

Really, is your college life okay?is repeating the "bedroom-classroom-canteen" wandering between the glue, every day in addition to classes on the idle life. From high school to university, the class is less, homework is gone, have more time can be used to free control, but do not know why, the day, instead of the more

higher the version, the more security is usually better. What's the use of IIS? About the role of IIS and some of the friends used are web site technicians or webmaster, for ordinary computer users, so we can see that the normal installation of the XP/WIN7/WIN8 system does not have IIS functionality, mainly because IIS is useless to ordinary users, was castrated.

What is a foreign key A foreign key (FK) is one or more columns that are used to establish and strengthen a link between two table data. You can create a link between two tables by adding one or more columns that hold the primary key values in the table to another table. This column becomes the foreign key of the seco

connect to Host (OS)Server. Similarly, if you give an alias to someone, this alias does not actually mean anything except yourself (the person you get the alias, when you say this alias, you know who it refers to (equivalent to your host ). Hosts fileIf you have such a ing entry, you do not know who the alias is (equivalent to your host ). Hosts fileWithout such a ing entry), you don't know what the

feature as a whole, click start → run, enter "Regedit.exe" and press ENTER to open the Register editor window. After you locate the Hkey_local_machinesoftware MICrosoft primary key, remove the key value named "Machine Debug Manager", quit Registry Editor, and then restart your computer. Some programs do not store the temporary files it generates in the "TEMP" folder, and they are stored in their own folders, and if these temporary files cannot be au

cluster instance. in Level 2 , we will look at the storage types available in SQL Server high availability and their typical usage. This will help you understand the horizontal series of future stairs. Vocabulary List AO AlwaysOn Availability Groups Fci failover cluster instance for SQL Server Tcp / ip Transmission Control Protocol / Internet protocols. Network protocol used by Microsoft Client Network Os/nos Operating