Understanding DNS Server, A Comprehensive Guide

Published on 25 March 2024

What is DNS Server, Function, How it Works, Structure and Benefits

In today’s digital era, the internet is an inseparable element of our daily lives. However, few realize that our ease of using the internet is largely supported by a tool called DNS server. 

Although often forgotten, DNS servers play an important role in making our internet navigation easier by converting numerical addresses into more user-friendly domain names. Want to know how vital this tool is to your browsing experience? Find out through this article. 

DNS Server Definition

To understand what a DNS Server is, we must start by understanding the definition of DNS itself. Here are some explanations to help you understand better. 

DNS, the “Address Book”

DNS functions as the internet’s address book, translating domain names like ‘google.com’ into the numerical IP addresses required for computer connections, such as ‘’. This system bridges the gap between user-friendly website names and the digital coordinates used by the internet to route data, making it easy to locate and access any website without the need to memorize complex numbers. 

DNS Server, the “Librarian”

A DNS server acts as a librarian for the digital address book. It matches the domain name you enter with its corresponding IP address, guiding your browser to the correct online destination. This process allows for easy access to websites, like finding a book in a library by its title rather than memorizing its shelf location. 

Don’t confuse them as identical, while closely interconnected, DNS and DNS servers each play unique roles. 

DNS Functions

What is the Function of DNS

DNS is crucial for translating domain names to IP addresses and serves other important functions that enhance the internet experience. For example. 

Translates Domain Names to IP Addresses

DNS converts human-readable domain names (e.g., ‘google.com’) into numerical IP addresses (e.g.,, enabling web browsers to load websites. 

Manages Traffic Load

For high-traffic sites, DNS distributes requests across several servers, optimizing website performance and reliability. 

Facilitates Email Delivery

By utilizing MX records (directs email to a mail server), DNS directs email to the correct mail servers, ensuring email communications are accurately routed. 

Enhances Security

DNS extensions, like DNSSEC, protect against cyber threats, verifying website authenticity to prevent users from being redirected to malicious sites. 

Speeds Up Web Access

DNS servers cache query results, reducing lookup times for subsequent visits to the same websites, thus speeding up web browsing. 

How Does a DNS Server Work?

A DNS server plays a crucial role in accessing websites on the internet. Here are the steps involved in how a DNS server connects your device to the desired website:  

1. User Query Initiation

When you enter a website name like ‘google.com’ into your browser, a DNS search to find its IP address begins.  

2. Recursive Resolver Activation

The resolver, part of the DNS server, starts the search by checking its cache to see if the IP address has been stored previously to expedite the process.  

3. Nameserver Consultations

The resolver “consults” with the root nameserver and TLD (Top-Level Domain) to determine the authoritative nameserver domain responsible for the searched domain. 

4. Authoritative Nameserver Lookup & Response

The authoritative nameserver provides the correct IP address, which is then forwarded by the resolver to your browser so you can access the website. 

 5. Caching for Future Efficiency

After obtaining the IP address, the DNS server stores it in its cache to expedite future visits. If the website is revisited, the process will be faster.  

DNS Server Structure

Comprehending the functionality of DNS servers requires an understanding of their structure, which can be broadly divided into two main components: the DNS hierarchy and the zones and records within DNS. 

The DNS hierarchy organizes internet navigation efficiently, starting with Root Servers that direct queries to Top-Level Domain (TLD) servers based on extensions like “.com” or “.org”. These TLD servers then point to the Authoritative DNS Servers, which have the definitive IP addresses for domains. This structured approach ensures precise query resolution. 

Complementing this hierarchy, DNS zones and records offer detailed management of domain configurations. Zones enable administrative oversight within the internet’s domain structure, while records handle specific functions—linking domain names to IP addresses, directing emails via MX Records, and creating aliases with CNAME Records. NS and PTR records further support authority delegation and reverse lookups, streamlining internet navigation by weaving together these hierarchical and administrative elements. 

Understanding Different Types of DNS Servers

There are four main types of DNS servers, each with their own unique role: 

Recursive Resolver

Your first stop when you search for a website. It looks for the domain’s IP address, starting with its cache for a quick answer. If it doesn’t have the info, it reaches out to other DNS servers. 

Root Nameserver

The gateway to more specific info, directing the recursive resolver to the right TLD nameserver based on the domain’s extension (.com, .net, etc.). Despite there being 13 types, multiple instances ensure fast global responses. 

TLD Nameserver

Specializes in domains under a particular extension, guiding the recursive resolver to the domain’s authoritative nameserver. Overseen by IANA, it separates domains into generic (.com, .org) and country code (.uk, .us) TLDs. 

Authoritative Nameserver

The final authority, holding the domain’s specific DNS records. It provides the exact IP address or points to another domain for further lookup. Enhanced with Anycast routing for reliability, it completes the journey by connecting your browser to the desired site. 

Advantages of Using DNS Server

Advantages of Using a DNS Server 

Using DNS servers greatly enhances our internet experience by streamlining access to websites with easy-to-remember domain names, rather than complex numerical IP addresses. They improve web browsing speed through caching, offer enhanced security options, and even provide solutions for navigating internet censorship.  

With that said, here are some of the main benefits of using a DNS server: 

Simplifies Internet Access

DNS servers map domain names to IP addresses, facilitating easy website access. 

Domain Management Simplified

Changes in a website’s IP only require updates at the DNS server, streamlining domain management. 

Speeds Up Web Page Loading

Stores IP address information in cache to accelerate repeated website access. 

Enhances Privacy and Security

Features like DNS over HTTPS encrypt data, protecting it from unauthorized access. 

Overcomes Website Blocking

Smart DNS features allow bypassing government or ISP web restrictions. 

These benefits are instrumental in ensuring that users can enjoy a seamless, efficient, and secure online experience. 

Disadvantages of Using DNS Server

Despite their numerous benefits, DNS servers are not without their downsides, such as: 

Dependency Concerns

Problems with a DNS server can impede internet access. 

Speed Limitations

Servers with limited capacity may slow down website loading times. 

Feature Limitations

Some DNS servers may lack essential features like Smart DNS or DNS over HTTPS. 

While DNS servers are indispensable for navigating the internet, they come with their set of challenges, including security vulnerabilities, reliance on server reliability, and limitations in speed and features. F5 BIG-IP DNS on Central Data Technology (CDT) presents a sophisticated solution designed to address these disadvantages, enhancing the effectiveness of DNS server usage while minimizing potential drawbacks. 

Overcoming Limitations with F5 BIG-IP DNS

Overcoming DNS Server Limitations with F5 BIG-IP DNS

Source: F5 BIG-IP DNS Product Overview 

F5 BIG-IP DNS is a DNS operation designed for large-scale, fluctuating query requests, guaranteed security, and efficient management. It overcomes the bottlenecks of conventional DNS servers, strengthening reliability and web efficiency for businesses. 

The innovation of F5 BIG-IP DNS lies in its capacity to handle up to 100 million responses per second, essential for dealing with sudden spikes in requests. With support for multicore scalability, express DNS, and IP anycast integration, the solution guarantees effective query processing and high application performance, making it a robust solution to the limitations of traditional DNS servers. 

F5 BIG-IP DNS Key Benefits

F5 BIG-IP DNS by CDT effectively mitigates the common disadvantages of traditional DNS servers, providing a resilient, high-performance solution for today’s complex digital environments. Its strategic approach to 

Unparalleled DNS Performance

Its hyper scaling capabilities allow for managing vast volumes of DNS queries without compromising on speed or reliability. 

Comprehensive Security

Address the critical need for secure DNS operations, protecting applications from potential threats that can cause customer and revenue loss. 

Increased Scalability through Enhanced Caching and Resolving

Increase DNS caching and enable independent DNS resolution, drastically reducing DNS latency and improving system scalability. 

Simplified DNS Network Management

Network maintenance and growth will become simpler, and traffic demand with users will be more available with easier management. 

Read more: A to Z DNS Management to Enhancing Website Performance and Security 

Central Data Technology: Ensuring Reliable DNS

Central Data Technology (CDT), as F5 ‘s authorized partner in Indonesia, will provide comprehensive IT solutions to meet your business needs. 

Supported by a professional, experienced, and certified IT team, CDT will also help you through the consultation, deployment, management, and after sales support stages so that you can avoid trial and error when implementing the F5 BIG-IP DNS solution. 

Interested in using the F5 BIG-IP DNS solution? Contact us by clicking this link here. 

Writer: Danurdhara Suluh Prasasta
Content Writer Intern CTI Group 


Don’t miss out!

Sign up for our newsletter and stay up to date.

Privacy & Policy

PT Central Data Technology (“CDT” atau “kami”) sangat berkomitmen untuk memastikan bahwa privasi Anda dilindungi dengan sebaik-baiknya sebagai hal yang sangat penting bagi kami. Melalui https://blog.centraldatatech.com/, kami akan mengatur penggunaan Anda terhadap situs web ini, termasuk semua halaman dalam situs web ini (secara kolektif disebut di bawah ini sebagai “Situs Web ini”), kami ingin berkontribusi dalam menyediakan lingkungan yang aman dan terjamin bagi pengunjung.

Berikut adalah ketentuan kebijakan privasi (“Kebijakan Privasi”) antara Anda (“Anda” atau “Anda”) dan CDT. Dengan mengakses situs web ini, Anda mengakui bahwa Anda telah membaca, memahami, dan menyetujui untuk terikat oleh Kebijakan Privasi ini.

Penggunaan Layanan Langganan oleh CDT dan Pelanggan Kami

Ketika Anda meminta informasi dari CDT dan memberikan informasi yang secara pribadi mengidentifikasi Anda atau memungkinkan kami untuk menghubungi Anda, Anda setuju untuk mengungkapkan informasi tersebut kepada kami. CDT dapat mengungkap informasi tersebut hanya untuk keperluan pemasaran, promosi, dan aktivitas sebatas untuk CDT dan Situs Web ini.

Pengumpulan Informasi

Anda bebas menjelajahi Situs Web ini tanpa memberikan informasi pribadi tentang diri Anda. Ketika Anda mengunjungi Situs Web atau mendaftar untuk layanan langganan, kami menyediakan beberapa informasi navigasional untuk Anda mengisi informasi pribadi Anda agar dapat mengakses beberapa konten yang kami tawarkan.

CDT dapat mengumpulkan data pribadi Anda seperti nama Anda, alamat email, nama perusahaan, nomor telepon, dan informasi lainnya tentang Anda atau bisnis Anda. Kami mengumpulkan data Anda dengan berbagai cara, secara online dan offline. CDT mengumpulkan data Anda secara online menggunakan fitur media sosial, pemasaran melalui email, situs web, dan teknologi cookies. Kami mungkin mengumpulkan data Anda secara offline dalam acara-acara seperti konferensi, pertemuan, lokakarya, dll. Namun, kami tidak akan menggunakan atau mengungkapkan informasi tersebut kepada pihak ketiga atau mengirimkan email yang tidak diminta ke salah satu alamat yang kami kumpulkan, tanpa izin Anda. Kami memastikan bahwa identitas pribadi Anda hanya akan digunakan sesuai dengan Kebijakan Privasi ini.

Bagaimana CDT Menggunakan Informasi yang Dikumpulkan

CDT hanya menggunakan informasi yang dikumpulkan sesuai dengan kebijakan privasi ini. Pelanggan yang berlangganan layanan langganan kami diwajibkan melalui perjanjian dengan mereka untuk mematuhi Kebijakan Privasi ini.

Selain penggunaan informasi Anda, kami dapat menggunakan informasi pribadi Anda untuk:

  • Meningkatkan pengalaman penjelajahan Anda dengan mempersonalisasi situs web dan meningkatkan layanan langganan.
  • Mengirim informasi tentang CDT.
  • Mempromosikan layanan kami kepada Anda dan berbagi konten promosi dan informatif dengan Anda sesuai dengan preferensi komunikasi Anda.
  • Mengirim informasi kepada Anda mengenai perubahan dalam syarat layanan pelanggan kami, Kebijakan Privasi (termasuk kebijakan cookie), atau perjanjian hukum lainnya.

Teknologi Cookies

Cookies adalah potongan kecil data yang situs web transfer ke hard drive komputer pengguna ketika pengguna mengunjungi situs web. Cookies dapat mencatat preferensi Anda saat mengunjungi situs tertentu dan memberikan keuntungan dalam mengidentifikasi minat pengunjung kami untuk analisis statistik situs kami. Informasi ini dapat memungkinkan kami untuk meningkatkan konten, memodifikasi, dan membuat situs kami lebih ramah pengguna.

Cookies digunakan untuk beberapa alasan, seperti alasan teknis agar situs web kami dapat beroperasi. Cookies juga memungkinkan kami untuk melacak dan mengarahkan minat pengguna kami untuk meningkatkan pengalaman situs web dan layanan langganan kami. Data ini digunakan untuk memberikan konten dan promosi yang disesuaikan dengan pelanggan yang memiliki minat pada subjek tertentu.

Anda memiliki hak untuk memutuskan apakah menerima atau menolak cookies. Anda dapat mengedit preferensi cookies Anda melalui pengaturan browser. Jika Anda memilih untuk menolak cookies, Anda masih dapat menggunakan situs web kami, meskipun akses Anda ke beberapa fungsi dan area situs web kami mungkin terbatas.

Situs Web ini juga dapat menampilkan iklan dari pihak ketiga yang berisi tautan ke situs web lain yang menarik. Setelah Anda menggunakan tautan ini untuk meninggalkan situs kami, harap dicatat bahwa kami tidak memiliki kendali atas situs tersebut. CDT tidak dapat bertanggung jawab atas perlindungan dan privasi informasi yang Anda berikan saat mengunjungi situs web tersebut, dan Kebijakan Privasi ini tidak mengatur situs web tersebut.

Kontrol Data Pribadi Anda

CDT memberikan kendali kepada Anda untuk mengelola data pribadi Anda. Anda dapat meminta akses, koreksi, pembaruan, atau penghapusan informasi pribadi Anda. Anda dapat berhenti berlangganan dari aktivitas pemasaran kami dengan mengklik “berhenti berlangganan” di bagian bawah email kami atau menghubungi kami langsung untuk menghapus Anda dari daftar langganan kami.

Kami akan menjaga informasi pribadi Anda agar tetap akurat, dan kami memungkinkan Anda untuk memperbaiki atau mengubah informasi identifikasi pribadi Anda melalui marketing@centraldatatech.com

Jangan lewatkan!

Daftar untuk newsletter kami dan tetap terkini.

Privacy & Policy

PT Central Data Technology (“CDT” or “us”) is strongly committed to ensuring that your privacy is protected as utmost importance to us. https://centraldatatech.com/ , we shall govern your use of this website, including all pages within this website (collectively referred to herein below as this “Website”), we want to contribute to providing a safe and secure environment for visitors.

The following are terms of privacy policy (“Privacy Policy”) between you (“you” or “your”) and CDT. By accessing the website, you acknowledge that you have read, understood and agree to be bound by this Privacy Policy

Use of The Subscription Service by CDT and Our Customers

When you request information from CDT and supply information that personally identifies you or allows us to contact you, you agree to disclose that information with us. CDT may disclose such information for marketing, promotional and activity only for the purpose of CDT and the Website.

Collecting Information

You are free to explore the Website without providing any personal information about yourself. When you visit the Website or register for the subscription service, we provide some navigational information for you to fill out your personal information to access some content we offered.

CDT may collect your personal data such as your name, email address, company name, phone number and other information about yourself or your business. We are collecting your data in some ways, online and offline. CDT collects your data online using features of social media, email marketing, website, and cookies technology. We may collect your data offline in events like conference, gathering, workshop, etc. However, we will not use or disclose those informations with third party or send unsolicited email to any of the addresses we collect, without your express permission. We ensure that your personal identities will only be used in accordance with this Privacy Policy.

How CDT Use the Collected Information

CDT use the information that is collected only in compliance with this privacy policy. Customers who subscribe to our subscription services are obligated through our agreements with them to comply with this Privacy Policy.

In addition to the uses of your information, we may use your personal information to:

  • Improve your browsing experience by personalizing the websites and to improve the subscription services.
  • Send information about CDT.
  • Promote our services to you and share promotional and informational content with you in accordance with your communication preferences.
  • Send information to you regarding changes to our customers’ terms of service, Privacy Policy (including the cookie policy), or other legal agreements

Cookies Technology

Cookies are small pieces of data that the site transfers to the user’s computer hard drive when the user visits the website. Cookies can record your preferences when visiting a particular site and give the advantage of identifying the interest of our visitor for statistical analysis of our site. This information can enable us to improve the content, modifying and making our site more user friendly.

Cookies were used for some reasons such as technical reasons for our website to operate. Cookies also enable us to track and target the interest of our users to enhance the experience of our website and subscription service. This data is used to deliver customized content and promotions within the Helios to customers who have an interest on particular subjects.

You have the right to decide whether to accept or refuse cookies. You can edit your cookies preferences on browser setup. If you choose to refuse the cookies, you may still use our website though your access to some functionality and areas of our website may be restricted.

This Website may also display advertisements from third parties containing links to other websites of interest. Once you have used these links to leave our site, please note that we do not have any control over the website. CDT cannot be responsible for the protection and privacy of any information that you provide while visiting such websites and this Privacy Policy does not govern such websites.

Control Your Personal Data

CDT give control to you to manage your personal data. You can request access, correction, updates or deletion of your personal information. You may unsubscribe from our marketing activity by clicking unsubscribe us from the bottom of our email or contacting us directly to remove you from our subscription list.

We will keep your personal information accurate, and we allow you to correct or change your personal identifiable information through marketing@centraldatatech.com