What is a DNS server address? Explanation of core concepts and functions

in the daily process of surfing the Internet, we only need to enter the familiar URL to open the corresponding website, which is inseparable from a silently running network addressing system, DNS server address is the core link. Many users may never take the initiative to pay attention to it, but when there are problems such as slow loading of web pages and inability to access websites, DNS server address is often the key to troubleshooting. This article will deeply analyze the core concepts, functions and practical skills of DNS server address to help you fully understand this basic element of the network.

What is the core concept of DNS server address?

to understand the DNS server address, we must first start from the basic function of DNS, which is the "address translator" in the online world, and the DNS server address is the exclusive positioning identifier of the translator.

1, the essence of DNS server address

DNS server address is a set of network identifiers composed of numbers, which are divided into IPv4 and IPv6 formats. The common IPv4 address is composed of four 0-255 numbers. Its core function is to locate the server that provides domain name resolution services. When the user enters the URL, the device will find the corresponding DNS server through this address and complete the conversion of the URL to the Internet Protocol Address.

2, DNS server address and domain name association

the URL we enter belongs to the domain name, it is a combination of characters for the convenience of user memory, but the communication between network devices can only recognize the Internet Protocol Address. The server pointed to by the DNS server address is the key node responsible for translating the domain name into the Internet Protocol Address. Without the correct DNS server address, the device cannot complete the translation process, and naturally cannot access the target website.

What are the core functions of DNS server addresses?

DNS server address seems to be just a string of ordinary numbers, but it is the core support to ensure smooth access to the network, and its role runs through the whole process of network requests.

1, to achieve efficient conversion of domain names and IP

this is the most basic and important role of DNS server address. When the user enters the domain name in the browser, the device will send a resolution request to the server pointed to by the DNS server address. The server quickly queries the database and returns the corresponding Internet Protocol Address, so that the device can accurately find the server of the target website. The whole process takes a very short time, and the user can hardly perceive the delay.

2, improve the stability and speed of network access

high-quality DNS server address points to the server, usually has a more complete node layout and caching mechanism. It will cache the corresponding relationship between the domain name and IP that has been resolved. When the same request is received again, it will directly return the cached result, reducing the time for repeated resolution and greatly improving the loading speed of the webpage. At the same time, the multi-node DNS server can automatically switch when a node fails to ensure the stability of network access.

3, to ensure the security of network access

regular DNS server address points to the server, will be built-in malicious domain name interception function, when the user tries to access the domain name with virus, phishing risk, the server will directly intercept the request and give a prompt to avoid users into malicious websites, add a security barrier for network access.

What are the common types of DNS server addresses?

according to the different operating entities and service scope, DNS server addresses are also divided into various types, and different types of service characteristics and application scenarios are different.

1, the operator's default DNS server address

this is the DNS server address that most users are using, allocated by operators that provide network services, such as mobile, China Unicom, telecommunications, etc. The advantage of this type of DNS server address is that it has good compatibility with the operator's network and low resolution delay, but some operators' DNS servers may have problems such as untimely cache updates and weak ability to intercept malicious domain names.

2, Public DNS server address

public DNS server addresses are provided by third-party institutions or enterprises, such as 114.114.114.114, 8.8.8.8, etc., and are free and open services for all users. The advantages of this type of DNS server address are rich cache resources, strong ability to intercept malicious domain names, and are suitable for users with higher requirements for cyber security and access speed. However, some public DNS servers may have certain resolution delays due to cross-operator networks.

3, private DNS server address

private DNS server addresses are usually built by internal networks such as enterprises and schools, and are only open to internal users. The servers pointed to by this type of DNS server address are mainly responsible for the resolution of internal domain names, which can better ensure the security and access efficiency of internal networks and avoid external network interference.

How to view and modify the DNS server address?

understand the relevant knowledge of DNS server addresses, master the methods of viewing and modifying DNS server addresses, which can help us quickly troubleshoot and optimize network problems.

1 View the current DNS server address

in the Windows system, you can right-click the network icon, open the network and Internet settings, enter the advanced network settings to view the network properties, you can find the currently used DNS server address; on the mobile phone, you can enter the WLAN settings, click the connected network details, you can view the DNS server address. In addition, you can also enter the "nslookup" command through the command prompt to quickly query.

2, the steps to modify the DNS server address

modify the path of the DNS server address is basically the same as the viewing path. In the network properties of the Windows system, find the DNS server address setting option, select Manual settings, and enter the DNS server address you want to use. On the mobile phone, in the WLAN details, change DHCP to static, and then enter the corresponding DNS server address. After the modification is completed, it is recommended to restart the network device to make the setting take effect.

sum up, the DNS server address is the core element to ensure the normal access of the network. From the core concept to the practical application, it runs through the whole process of network addressing. We must not only understand the nature and function of the DNS server address, but also understand its different types of characteristics, master the practical skills of viewing and modifying, so that when encountering network problems, we can accurately troubleshoot, and improve the speed and security of network access by choosing the appropriate DNS server address.