Network Programming: Protocols and Sockets

Chapter 27 introduces network programming foundations, internet protocols, and the Windows Sockets (Winsock) specification. The chapter establishes the networking hierarchy, comparing the OSI 7-layer model with the TCP/IP protocol suite (IP, TCP, UDP). Internet addressing is explored through IPv4 addresses, port numbers, and Domain Name System (DNS) resolution using gethostbyname and getaddrinfo. Students are introduced to the Berkeley sockets programming paradigm adapted for Windows via Winsock2. The lesson details library initialization using WSAStartup with the WSADATA structure, and proper library termination using WSACleanup. In this chapter, students investigate key structural foundations of Windows programming and systems architecture. Through practical analysis of Win32 APIs, the lesson clarifies fundamental runtime mechanisms and memory management models. Special attention is given to message dispatching, operating system control transfer, and robust error management. Mastering these core principles allows learners to develop responsive, secure, and resource-efficient desktop software applications. Analytical exercises and solved examples further assist students preparing for Virtual University midterm and final term exams. The curriculum systematically connects low-level system design with modern software engineering paradigms and practical debugging strategies. Reviewing the accompanying lecture handouts and conceptual diagrams reinforces understanding of kernel and user space interactions. Consistent hands-on practice with API prototypes and data structures ensures comprehensive preparation for both theoretical assessments and practical development tasks. In this chapter, students investigate key structural foundations of Windows programming and systems architecture. Through practical analysis of Win32 APIs, the lesson clarifies fundamental runtime mechanisms and memory management models. Special attention is given to message dispatching, operating system control transfer, and robust error management. Mastering these core principles allows learners to develop responsive, secure, and resource-efficient desktop software applications. Analytical exercises and solved examples further assist students preparing for Virtual University midterm and final term exams. The curriculum systematically connects low-level system design with modern software engineering paradigms and practical debugging strategies.