Configuration of DNS server of Huawei ENSP simulator

Catalog

One 、 First, we need a server

Two 、 Turn on the server , To configure DNS The server .

1、 Double click to open the server to complete the basic configuration , Configure one for the server IP Address ：

2、 Configure server information , To configure DNS The server ：

3、 ... and 、 Enter the router configuration information

  Four 、 stay pc In machine view dns The server , and ping website

1、 Give Way pc machine IP The address depends on the configuration DHCP obtain

 2、 open pc Machine command line , Input ipconfig View network information

 3、 Try whether ping Link website .

TCP Deal with the UDP Advantages and disadvantages of the agreement .

TCP agreement ：

UDP agreement ：

DNS And CDN：

DNS：

CDN：

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DNS The server is used for domain name resolution .

principle ： When pc When I visit the website , This website will be sent to DNS The server ,DNS The server will parse the URL into ip Address returned to pc machine , then pc Hold this DNS The server returned ip Address , The server that accesses this website .

If there is no DNS, You cannot access the website .

One 、 First, we need a server

Two 、 Turn on the server , To configure DNS The server .

After we pull out the server , Connect the switch , Start configuring server information .

1、 Double click to open the server to complete the basic configuration , Configure one for the server IP Address ：

2、 Configure server information , To configure DNS The server ：

3、 ... and 、 Enter the router configuration information

  Four 、 stay pc In machine view dns The server , and ping website

1、 Give Way pc machine IP The address depends on the configuration DHCP obtain

 2、 open pc Machine command line , Input ipconfig View network information

 3、 Try whether ping Link website .

  That's all right. , Express DNS The server has been configured . End of experiment .

Supplementary knowledge ：

TCP Deal with the UDP Advantages and disadvantages of the agreement .

TCP agreement ：

advantage ： High reliability

shortcoming ： Slow transmission

It is suitable for high requirements on the integrity of file transmission , But the type of transmission that is not aware of delay .

for example ： E-mail 、 Update client , Losing a package in these types of file transfers may make the file unusable . So use TCP agreement .

UDP agreement ：

advantage ： Fast transmission speed

shortcoming ： You may lose your bag

Suitable for transmission with speed requirements , But the document types that do not require high integrity .

for example ： Operation in the game , Need extreme speed , High speed requirements , But a small amount of packet loss has little effect .

DNS And CDN：

DNS：

DNS The role of the server is to parse the URL entered by the user , Parse the URL into IP Address , Provide users with access to the information they want .

CDN：

Different people visit the same website , Return to a different IP Address .

On double eleven , There will be a lot of shoppers , When everyone visits Taobao , If there is only one Taobao server , It's bound to explode , So Taobao has more than one server , But the server IP The address is fixed , Everyone visits the same Taobao website . How to let users go to different servers when accessing the website ？

That's when CDN,CDN Is to return the URL to a different IP Address , Let users access different Taobao servers , Place server overload .