What is DNS and How it Works? F5 DNS

The Domain Name System converts domain names into internet IP addresses. It help users to easily remembers the domain name instead of IP addresses. When a user on internet tries to access a website using its domain name, first tries to convert into an IP address with the help of DNS. DNS also provides other critical services, such as email routing and server discovery. In this article, we will explore how DNS works in general and why F5 DNS is used.

How DNS Works in General
The Domain Name System (DNS) is a server distributed across the internet which store website names called domain names and their IP addresses.

The DNS system works in a hierarchy, with different levels responsible for different domains. There are top level domain like .com, .org, and .net in the hierarchy. The next level are the second-level domains like example.com and uninets.com.

In the above diagram when any internet use tries to access a website by typing its domain name in the browser. This request first sends to a DNS resolver. The resolver checks its cache to see if it already has the IP address for the website. Sometime when resolver does not have the IP address associated with the requested domain name then this request sends to the root domain which is the top level domain where the request to resolve from domain name to IP address gets resolved.

The root domain server provides the IP address of top level domain then resolver asks the top level domain server the IP address of the second level domain. This process continues until the resolver gets the IP address for the website you typed in.

When resolver gets the IP address then it sends back to the user's web browser. Now request from the browser sends to this IP address which belongs to the web server, when web server receives this request and respond to that request of the web page to the browser.

So why use F5 DNS? F5 DNS is a type of DNS service that helps organizations manage their DNS infrastructure more efficiently. It provides load balancing to send traffic across multiple servers. To reduce the latency the global server load balancer routes traffic to the closest available server. F5 DNS also offers security features like DDoS protection, which helps prevent attacks that could overwhelm your DNS infrastructure. This ensures websites are always available and performing well.

Why F5 DNS is Used
F5 DNS is a domain name system which provides high  availability, scalability, and security to applications and services. F5 DNS formerly known as F5 GTM is a load balancing solution which distributes traffic across multiple servers. Here are some reasons why F5 DNS is used:

High Availability: F5 DNS provides high availability by automatically detecting and routing traffic away from failed servers or applications to healthy ones.

Scalability: F5 DNS allows organizations to easily scale their applications and services by distributing traffic across multiple servers. This allows organizations to handle large volumes of traffic without any performance issues.

Security: F5 DNS protects applications from DDoS attacks and DNS spoofing. F5 DNS can detect and block these attacks in real-time, ensuring that applications and services remain secure and available to users.

Traffic Management: F5 DNS allows organizations to manage their traffic effectively by providing advanced traffic management capabilities. F5 DNS can prioritize traffic based on user location, application type, or other criteria to ensure that users receive the best possible experience.

DNS Firewall: F5 DNS provides a DNS firewall that protects organizations from DNS-based attacks. This firewall can block malicious traffic, preventing attackers from exploiting vulnerabilities in the DNS system.

Conclusion
DNS is a critical component of the internet, which translates domain names into IP addresses. DNS operates in a hierarchical structure, with each level of the hierarchy responsible for a specific domain. F5 DNS is a load balancing solution ensures that applications and services are always available to users.