Do Websites Appear by Magic When You Type an Address?
Every day, we open our browsers, swiftly type in a website address, and just like that, the desired page magically appears on our screen. We take this for granted, as if we’ve waved a magic wand. However, behind this everyday experience lies a complex and sophisticated system. The star of today’s discussion is the DNS (Domain Name System) server.
In the world of the internet, all computers recognize and communicate with each other through numeric IP addresses. For instance, while Naver has the address 'www.naver.com', computers use a numeric address like '223.130.195.200' as its true home address. Imagine how inconvenient it would be if we had to memorize the numbers for every website! Using the internet would be a painstaking task, wouldn't it?
What is a DNS Server? The 'Internet's Phonebook' and 'Navigation System'
This inconvenience is precisely what the DNS server solves. DNS stands for Domain Name System, and simply put, it acts like the 'Internet's phonebook'. Just as we look up a person's name to find their phone number, a DNS server converts human-readable domain names like 'naver.com' into IP addresses that computers can understand.
To provide a more intuitive analogy, you can think of it as a 'navigation system' for finding websites. Just as a navigation system tells us the exact route when we enter a destination address, DNS looks at the domain name you entered and finds the exact IP address (destination) of that website.
The Secret Behind Instant Websites: How DNS Works
So, how do these DNS servers magically find the IP address when we type in an address? Let's look at the DNS working principle in a simple sequence:
- Address Entry (User): The entire process begins when you type a domain name like 'chickenbanana.com' into your web browser.
- Query to the Recursive Resolver (ISP): Your computer first sends a query to a server called a Recursive DNS Server, or DNS Resolver. This resolver is typically provided by your Internet Service Provider (ISP). It acts like a secretary, finding the website address on behalf of other servers.
- Question to the Root Server: If the recursive resolver doesn't have the information it needs (the IP address), it queries the Root Name Server, which sits at the very top of the internet's DNS hierarchy. There are 13 groups of root servers worldwide, acting like central authorities that know the 'starting point' for all domains.
- TLD Server Guidance: The root server then provides the address of the server that manages the Top-Level Domain (TLD), such as '.com' in 'chickenbanana.com'. For example, the '.com' domain has a TLD server that manages '.com', and the '.kr' domain has a TLD server that manages '.kr'.
- Authoritative Name Server Guidance: The recursive resolver now asks the TLD server if it knows the exact IP address for 'chickenbanana.com'. The TLD server responds by providing the address of the Authoritative Name Server for that domain. This server is where the true IP address of the chickenbanana.com website is stored.
- IP Address Delivery and Caching: The recursive resolver receives the IP address for 'chickenbanana.com' from the authoritative name server and delivers it to your computer. At this point, the resolver temporarily stores (caches) this information so it can respond faster if the same address is requested again in the future.
- Website Access: Your computer then uses the received IP address to directly connect to the web server and load the website page.
All of these steps happen in the brief moment between you typing the address and pressing Enter. Isn't that amazing?
The DNS lookup process where a domain name is converted to an IP address
Is Your Internet Lagging? When You Might Need to Change Your DNS
We typically use the default DNS server provided by our ISP, but sometimes these DNS servers can cause problems. This might manifest as unusually slow website loading or difficulty accessing certain sites. In such cases, you might consider changing your DNS.
What Can You Gain by Changing DNS?
- Improved Internet Speed: If your current DNS server is slow or unstable, it can affect your overall internet speed. Switching to a faster, more stable public DNS server (e.g., Google DNS, Cloudflare DNS) can noticeably speed up website loading. Especially for services like YouTube, Google, and Netflix, which use large-scale hosting servers with multiple IP addresses, using an optimized DNS server can lead to speed improvements.
- Enhanced Security and Privacy: Some public DNS servers offer features like blocking malicious code or phishing sites. Additionally, some argue that it helps prevent ISPs from tracking your website visit history, thus enhancing privacy.
- Access to Blocked Sites: In cases where a website is blocked by a specific DNS, changing your DNS can sometimes allow access.
However, an internet speed DNS change doesn't guarantee a speed increase in all situations. Depending on the case, accessing domestic services might become slower, or your ISP's default DNS might already be the fastest for your environment. It's crucial to find the DNS server best suited for you, and you can test them using tools like 'DNS Benchmark'.
FAQs
Will Changing DNS Servers Speed Up Game Ping?
Changing DNS servers primarily improves the speed of the domain name to IP address conversion process. This means it can help reduce the time it takes to initially connect to a game server. However, once connected, in-game ping is more heavily influenced by other factors such as the physical distance to the game server, internet line quality, and network traffic. Therefore, it's difficult to conclude that changing DNS alone will dramatically lower game ping.
How Can I Check My Computer's DNS Server Address?
The method varies slightly depending on the operating system. For Windows, you can find the DNS server address by navigating to 'Control Panel > Network and Sharing Center > Change adapter settings', selecting your active network connection, and then checking the properties under 'Properties > Internet Protocol Version 4 (TCP/IPv4)'. On macOS, you can find it under 'System Settings > Network'.
Performing Such Important Work Without Us Even Knowing!
The moment you type a domain name into your web browser's address bar, various DNS servers silently and busily work behind the scenes to find the correct IP address. All of this happens in a fraction of a second, which is why we can use the internet so conveniently. The DNS server is truly the unsung hero of the internet.
We hope this article has helped you easily understand DNS, one of the fundamental workings of the internet you use every day. Next time your website access feels a bit slow, you might just think, 'Ah, is DNS working hard, and something's gone awry?' and gain a moment of understanding!