文章索引
What Happens During a Visit
Break down "entering a domain name to seeing the page" into understandable stages, and build the most important big-picture view for building a website.
Domains, DNS, and Resolution
Understand domains, DNS records, Nameservers, resolution propagation, and common access methods. This is a hurdle you must clear when building your first site.
HTTP and HTTPS
From protocol responsibilities, TLS, and certificates to real-world HTTPS configuration when building a site, understand the real difference between HTTP and HTTPS.
CDN Principles and Applications
Understand CDN through cache hits, origin pulls, edge nodes, and caching strategies, instead of treating it as a black-box accelerator.
Hotlink Protection, CORS, and Host
From principles to Aliyun OSS configuration, a thorough explanation of hotlink protection (Referer), cross-origin (CORS), and Host validation, including differences, use cases, and combined strategies.