Have you ever considered how entering a web address in your browser leads you to the correct website? The answer is DNS (Domain Name System). DNS translates readable domains into numerical IP addresses. This lets your browser access websites.
This guide will explore the complexities of DNS. It will cover its functions and critical elements. We will also assist in changing your DNS server and addressing common questions. Let’s start.
What is DNS?
DNS (Domain Name System) converts domain names into IP addresses. This allows computers and servers to communicate. Each website has a unique numeric IP address (192.168.1.1), which is difficult to remember. DNS simplifies this by converting the domain name to its IP address. It then directs the user to the desired site.
For example, when you open a website, DNS processes your request. It then looks up the site’s IP address, allowing your browser to find and load that webpage. This process goes on behind the scenes for you, but it is a fundamental part of everyday Internet use.
How does DNS work?
DNS facilitates website access. When you enter a website URL into your browser, DNS changes the name to the corresponding IP address. You need this change to access the website’s servers. The process follows this sequence:
- Your browser sends a website name request to your computer.
- Before saving, your PC checks if this address is already stored.
- The request is sent to your ISP’s DNS resolver if this address is insecure.
- The DNS resolver obtains information from different DNS servers.
- First, the information is gained from the root servers.
- Domain details are taken from TLD servers based on information received from root servers.
- Finally, the IP address of the specific domain is gathered from the Airac DNS servers.
- The obtained IP address is returned to your computer, which connects to the website’s server
- The browser loads the website using this IP address.
Types of DNS Server
In a standard DNS query, servers collaborate to resolve the domain name. The client’s stub resolver then receives the related IP address. Below are four types of DNS:
- Recursive resolver
The recursive resolver server, also known as a caching server, is your client’s first destination when a DNS query is created. This often happens when a person opens a web browser and enters a URL with a domain name. The client device will be set up with DNS settings to determine the initial location for finding the domain name.
The DNS configurations can be expressly set or automated through DNS management tools within your network. If the recursive resolver server has already cached the information for this domain name from a recent search, it can quickly provide the client with the correct IP address when requested. If not, a recursive search is needed to gather this data. The Root server will prompt the process.
- Root Server
The recursive resolver initially consults the root server. A group called IANA (Internet Assigned Numbers Authority), a division of ICANN (Internet Corporation for Assigned Names and Numbers), oversees the management of these root servers.
DNS follows a hierarchy, so starting with the root server is the key to correctly identifying the domain name. Menandmice.com and menandmice.com, the root server, can instruct the recursive server to consult the appropriate top-level domain server, such as .com.
The root server might also store this data and respond directly to the recursive resolver. If this doesn’t occur, it will be sent to the Top-Level Domain server.
- TLD Name Server
A TLD nameserver holds data for domain names with the same domain extension, such as .com or .net, located after the final dot in a URL. In the case of a .com TLD nameserver, it stores information for all websites with a ‘.com’ ending.
After receiving a response from the root nameserver, the recursive resolver will query the .com TLD DNS when looking for a website like google.com. The server then forwards the query to the authoritative domain nameserver for more details.
ICANN, an Internet Assigned Numbers Authority (IANA) division, manages TLD nameservers. IANA categorizes TLD servers into two primary sorts: generic domains such as .com, .org, and .net, not associated with a particular country, and country-specific domains like .ru, .uk, and .us, affiliated with specific nations.
A third category for infrastructure domains is rarely used and was mainly designed for the .arpa domain. It was significant in the development of modern DNS but is now mostly considered historical.
- Authoritative DNS server
The authoritative name server will contain the IP information the client searched for. Companies, groups, or individuals who lease the use of domain names are required to register the name with the official domain name authority. This enrollment officially publishes the domain name on the network, including the public, internet, and private web.
The recursive server can now store the information for future use and share the terminus information with the client-server. If data is stored in a cache, it will load faster on the user’s device.
What is a DNS cache?
A DNS cache stores every request your browser sends to a DNS server. When you type a URL in your browser, it requests the DNS server to get the URL’s IP address. Once your browser obtains the IP address, it will display the appropriate website on your screen.
But what happens if you attempt to visit the website for a second time? Does the browser need to generate a new request to the DNS server?
No, I have disagreed. Typically, OSes store IP addresses and DNS records in memory to speed up future requests. This represents your DNS cache. The DNS cache saves browsers from making new requests using stored data to access the website. This helps decrease server response times, leading to faster site loading.
Why DNS Security Matters
DNS security is essential because this system connects websites and services to users on the Internet. If this technique is compromised, attackers can easily redirect traffic or steal data using fake websites. For some reason, DNS is not secure for online banking, e-commerce, and the world’s most sensitive services.
On the other hand, DNS attacks such as DNS spoofing and cache poisoning are not beneficial to individual users but can harm poor networks. Through these attacks, hackers can steal surfboards and make sites inaccessible, a significant drawback for businesses and organizations. After all, enforcing DNS security is a must for every digital platform.
Privacy-focused networks such as I2P also rely on secure routing to help protect user anonymity, although they serve a different purpose than DNS. While DNS translates domain names into IP addresses, I2P creates an encrypted, peer-to-peer network designed for anonymous communication and access to privacy-focused services. If you’d like to learn more, this TorWire guide on what I2P is, an anonymous P2P Network, explains how it works and when it’s used.
How to Change Your DNS Server
Following these guidelines can help you switch your existing DNS server, improving your online experience by enhancing speed and security:
- First, open your device’s network or internet settings. Although each device’s settings differ slightly, these options are often found under “Network” or “Internet.”
- Find your active network connection, whether Wi-Fi or wired (Ethernet) and click on the details of this connection.
- The DNS server options are found within the network settings, often called “DNS Settings” or “IP Settings.” You must manually update this option.
- Set the DNS settings to manual mode, and then set your DNS server addresses. There are two types of addresses: preferred DNS (primary) and alternative DNS (secondary).
- When you’re done entering the DNS addresses, save the changes. This process can differ slightly for each device, but generally, there is a ‘Save’ or ‘Apply’ button.
- On some devices, the Settings tab only applies once you disconnect and reconnect the Internet connection or restart the device.
Conclusion
DNS is vital to our digital life. It gets us to our favorite websites daily, without fail. This system avoids complex IP addresses. It makes the web more connected and accessible. DNS runs in the background. It keeps your experience smooth and secure, whether browsing or banking.
This article gives key information about DNS. It will help you understand it and learn about online security. Optimizing your DNS settings can speed up and secure your internet. So, why not check today?
FAQs
Can I boost my Internet speed by changing DNS servers?
Yes, changing DNS servers can improve the speed and security of your internet connection, especially if you are using a faster and more reliable DNS server.
Can switching DNS servers improve my online security?
Of course, a better DNS server can provide more security, as some DNS services provide additional measures to protect against cyber attacks.
Is it legally acceptable to exchange servers?
Changing DNS is entirely legal and often helpful for users.
How does changing DNS servers affect privacy?
It depends on your DNS service; some DNS services log your browsing history, while others prefer privacy.
What role do DNS servers play in Internet downtime?
If the DNS servers are down, you cannot access the websites, even if your Internet connection is fine.
