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DNS stands for Domain Name System, and it can be understood from two perspectives: as a system and as a protocol. This article explores both aspects to help you gain a comprehensive understanding of its functionality.

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DNS as a System

When referring to DNS as a system, we’re discussing the robust architecture and global infrastructure that supports its operations. This system is responsible for converting human-friendly domain names into numerical IP addresses. The translation process is complex and is performed by a network of distributed servers arranged in a hierarchical structure.
The DNS system operates through multiple layers of servers that work together to ensure accurate and efficient domain resolution.

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DNS as a Protocol

DNS also functions as a protocol, which defines the rules for making DNS queries. In this role, it specifies the format for both requests and responses, ensuring smooth communication between clients and servers. It relies on the underlying infrastructure to execute these transactions effectively.
The image is a diagram explaining DNS, highlighting its system architecture and infrastructure on the left, and the protocol rules for making a DNS query on the right.
This diagram provides a visual overview of both the system and protocol components of DNS, illustrating how they interconnect to deliver reliable domain resolution. Let’s begin by examining DNS as a system in more detail.

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