The principle of DNS work detailed

The computer can only recognize IP addresses such as "201.51.0.73" when it communicates on the network. But can not know such as www.ccidnet.com domain name, but, when open the browser, in the address bar input such as www.ccidnet.com domain name, you can see the required page, this is because there is a call "DNS server" computer automatically put our domain name "translation" into the corresponding IP address, and then the IP address of the corresponding page.

What is DNS

DNS (domain Name System) is the abbreviation for the "name Systems", a computer and network service naming system organized into a domain hierarchy that is used for TCP/IP networks, and is used primarily for user friendly, user-friendly names such as www.ccidnet.com Instead of boring and difficult to remember IP addresses (such as "210.51.0.73") to locate the appropriate computers and corresponding services. Therefore, if you want a friendly name to be recognized by the network, you need to have a "translator" between the name and the IP address, which translates the relevant domain name into the appropriate IP address that the network can accept. DNS is such a "translation officer", it works can be represented in the diagram.

Figure 1

How to establish DNS

In the campus network to use DNS, you can establish the internal DNS service, so that our campus network application more humane.

1, to achieve the goal

A school needs to configure a sjsgz.net domain for work, as shown in Figure 2.

Figure 2

In this domain, in order for the user to type the appropriate host name in the browser address bar, the corresponding service will be found, and the appropriate DNS server needs to be set.

2, the DNS service installation

We started with guanli.sjsgz.net and are ready to install the DNS Server service on this machine. To install DNS, follow these steps:

(1) Select "start → settings → control Panel" to open "Add/Remove Programs".

(2) Click Add/Remove Windows Components to wait for the Windows Component Wizard to start.

(3) Click the Next button to eject the Windows Components list.

(4) Click [Network Services], and then click the Details button.

(5) Click the check box next to DNS (domain Name System).

(6) Click the OK button to return to the Windows Components dialog box.

(7) Click Next to install the appropriate services, and then click the Finish and Close button to complete.

You do not need to restart your computer, click "Start → program → admin tool →dns" to appear in the window shown in Figure 3, at which point you can see the icon representing your server (Guanli) in the left window.