what is primary and secondary dns

The DNS server is the abbreviation for the computer domain Name System, domain name, or domain Name service, which is composed of a parser and a domain name server. A domain name server is a server that holds the domain name and corresponding IP address of all the hosts in the network and has the ability to convert dom

Refreshing the DNS cache only needs to be refreshed by using the command to flush the DNS cache. So what is the command to flush the DNS cache? is "Ipconfig/flushdns". The specific steps are as follows: First, hold down the keybo

Domain Name resolution is set at DNS, and the DNS server points your domain name to the server where your page is stored.　　domain bindings are set up in the server, and the server that stores your Web pages is bound to your domain name to direct the browser to the physical l

Intelligent DNS resolution is a kind of DNS solution for the current problems of telecommunication and netcom interconnection. Concrete implementation is: the same domain name such as test.winiis.com of a record set points to netcom and telecom IP, when Netcom's customer access, smart

New Win7 users reflect, Win7 DNS problems, do not know how to solve. So the small series specially for everyone to edit an article about "Win7 DNS problems how to do?" The article: The reason for the problem with computer DNS is as follows: DNS problems occur because of th

What is the view error in the DNS configuration file? -- Linux general technology-Linux technology and application information. for details, refer to the following section. When I configure the DNS service, named. the conf configuration is correct. it

TROJAN/DNSCHANGER.AA "DNS Chameleon" Variant AA is a Trojan program that tamper with DNS settings on a user's computer. The "DNS Chameleon" variant AA runs after copying itself into the system directory, removing the original files from the virus. Modify the registry to achieve a power-on reboot. Listen for hacker inst

DNS is the abbreviation of English domain Name System, which is the meaning of domain name resolution server, namely domain name Management system. Its role in the Internet is to transform the domain name into an IP address that the network can identify. First of all, to know that the Internet web site

The difference between the DNS server on Fedora7 and earlier versions-Linux Enterprise Application-Linux server application information. The following is a detailed description. Many of my friends refer to documents on the platform before RHEL4 or Fedora core5. On Fedora 7, many things have changed. This article briefly introduces the corresponding methods. Software List Bind-libs-9.4.0-6.fc7 Bind-chroot-9

, return a china.com recommendation, same repeatedly send query to china.com, return military.china.com server push Recommended, so military.china.com for this query information is authoritative, and return the address of CS. This completes the whole process, oh, no, another point, ns.comp.fudan.edu in this process will tell the cache host CS address, while caching the server list of the. com,china.com,military.china.com. Caching and efficiency: The c

Http://zhangbin.blog.51cto.com/666869/286257 1. recursive query:Generally, recursive queries are performed between the client and the server. After a request is sent from the client to the DNS server, if the DNS server itself cannot be resolved, a query request is sent to another

Causes DNS frequent error cause analysis ⒈ virus in computer If the computer virus is generally malicious software tampering User homepage, hijacked computer DNS, etc., causing the computer to open a well-known website will jump to other malicious sites, or simply can not open the site. Solution: Use antivirus software to scan the computer first, check whether

Document directory What is a primary key and a foreign key? What is a primary key? What is a foreign key? [Tag: foreign key, key, forei

DNS hijacking also known as domain name hijacking, refers to the hijacking of the network to intercept the domain name resolution request, analysis of the requested domain name, the scope of the review of the request to release, otherwise the return of the false IP address or do not make the request to lose the response, the effect is to a specific network can not respond or visit the false web site. Basic

Recent small series has received a friend's message that his web page will often automatically jump to some ad pages, open such as PC6 download station and shrimp Music these pages, will automatically jump to a new page, has been in the preferences of the selection of blocking pop-up windows and other settings can not be resolved. This situation should be the DNS was hijacked, small series through the network collection and collation of Mac computer

A federated primary key is a primary key that consists of 2 or more 2 fields. This combination is unique in the data table and has a primary key index, using the field contained in the primary key as the

student score of 1 to Score1, when I add a student information of 2 to the Student1 table, it is added unsuccessfully, because there is no association, unless there is a student score of 2 in Score1. Only in this way can there be referential effect, so the referential integrity is ensured. Add:

1.hkey_classes_root The primary key is used to manage the file system, which records information about all data files in the Windows operating system, and mainly records the file name suffixes of different files and their corresponding applications. When a user double-clicks on a document, the system can start the appropriate application with this information. 　　2.hkey_current_user This