Concept Explanation Load balancers, reverse proxies, and API gateways are critical components in modern system design, each serving distinct yet overlapping roles in managing network traffic, enhancing performance, and ensuring security and scalability. These technologies are fundamental to distributed architectures,…

Concept Explanation A proxy server and a reverse proxy are intermediary systems that facilitate communication between clients and servers, but they differ fundamentally in their orientation, purpose, and operational context. These technologies play pivotal roles in modern network architectures, addressing…

Concept Explanation A Content Delivery Network (CDN) is a geographically distributed network of servers designed to enhance the delivery speed, reliability, and scalability of digital content, including web pages, images, videos, and applications, to end-users across the globe. CDNs have…

Concept Explanation The Domain Name System (DNS) is a hierarchical, distributed naming system that serves as a critical infrastructure component of the internet, facilitating the translation of human-readable domain names (e.g., www.example.com) into machine-readable Internet Protocol (IP) addresses (e.g., 192.0.2.1).…

Concept Explanation System design interviews are a critical component of technical evaluations for software engineering roles, particularly at leading technology firms, where candidates are assessed on their ability to architect scalable, reliable, and efficient systems. The “10 BIG Questions of…

Concept Explanation Answering a system design interview problem demands a systematic and structured methodology to effectively demonstrate an understanding of architectural principles, trade-offs, scalability considerations, and practical implementation strategies. System design interviews are designed to assess a candidate’s capability to…

Concept Explanation In system design, trade-offs represent the inevitable compromises between competing system attributes that must be balanced to meet specific requirements. Two fundamental trade-offs are latency versus throughput and consistency versus performance, each influencing how systems handle load, data…

Concept Explanation Vertical and horizontal scaling are two fundamental approaches to enhancing a system’s capacity to handle increased load, such as higher user traffic, data volume, or computational demands. These strategies are integral to system design, enabling architects to ensure…

Concept Explanation Availability, in the context of system design, refers to the measure of a system’s uptime—the percentage of time it remains operational and accessible to perform its intended functions under normal or anticipated conditions. It is a critical metric…