Web servers basics: request lifecycle, virtual hosts, DocumentRoot, static vs dynamic, reverse proxy, logs, TLS, compression, and quick troubleshooting. What a Web Server Does Request Lifecycle (Server View) Core Concepts Virtual Hosts (Server Blocks) Host multiple sites on one server…
Understand major TCP/IP application services HTTP, DNS, SMTP/IMAP/POP3, FTP/SFTP, SSH, NTP—plus ports, transports, TLS/STARTTLS, DoH/DoT, and labs. Application Layer in TCP/IP Application protocols sit above the Transport layer. They rely on TCP for reliability, UDP for low-latency delivery, or QUIC…
Applications and TCP/IP model: layers, encapsulation, ports, TCP vs UDP, IP addressing, routing, NAT, MTU/TTL plus hands-on commands and diagrams. Why TCP/IP Still Matters? Every web request whether your site uses React, Django, or Node relies on TCP Knowing the…
Introduction to web systems: client–server, DNS, HTTP/HTTPS, status codes, and cookies vs sessions with a clear concept diagram. What Is a Web System? A web system is the full pathway that turns a URL into pixels on your screen. It…