Subdomains
Subdomains are a hierarchical part of the Domain Name System (DNS) that allow organizations to create separate, distinct sections of a website or network under a main domain. They are used to organize and manage different services, applications, or departments, such as 'blog.example.com' or 'api.example.com'. This concept is fundamental in web development, networking, and system administration for structuring and routing internet traffic.
Developers should learn about subdomains when building scalable web applications, managing multiple services under a single domain, or implementing security and organizational strategies. Specific use cases include creating separate environments for development, staging, and production (e.g., 'dev.example.com'), hosting microservices or APIs (e.g., 'api.example.com'), and improving SEO by segmenting content (e.g., 'blog.example.com'). Understanding subdomains is essential for configuring DNS records, setting up web servers, and ensuring proper routing in cloud platforms.