Core Networking Concepts 1.1 Local and Wide Area Networks A local area network (LAN) connects computers and devices within a limited geographic area, forming a private communication network. In contrast, a wide area network (WAN), also known as the public internet, links multiple LANs or metropolita...
HyperText Transfer Protocol - HTTP The HyperText Transfer Protocol is described in the following document: RFC 2616. It is a long and complex 176-page document with a lot of detail. If you are interested, feel free to read it all. However, if you look around page 36 of RFC 2616, you will find the sy...
Network Communication Overview Network communication requires two essential elements: Addressing: IP address and port number identify communicating endpoints Protocols: Standardized rules governing data exchange (OSI reference model vs TCP/IP model) The TCP/IP model became the de facto standard desp...
Unity3D's default TCP networking can be inefficient for large file transfers due to its reliability mechanisms. UDP offers a faster alternative by sacrificing guaranteed delivery, making it suitable for scenarios where speed is prioritized over perfect reliability. UDP Protocol Fundamentals UDP (Use...
Blocking Mode Network Communication In blocking mode, a single thread can only handle one client connection at a time. When a socket operation encounters no available data or connection, the thread suspends execution and releases the CPU. Server Implementation in Blocking Mode import java.io.IOExcep...
Network Programming Basics Use Java's InetAddress class to retrieve host information. To get local host details, call the static getLocalHost() method, and use getAllByName() to fetch all IP addresses for a given domain name. import java.net.InetAddress; import java.net.UnknownHostException; public...
Network Protocol Architecture Computer networks rely on layered communication standards that define how devices exchange data. The OSI model conceptualizes seven distinct layers, though the TCP/IP stack commonly implements four functional layers in practice. Physical and Data Link Layers At the phys...
Socket Programming Interface The socket() Function The function signature is: #include <sys/types.h> #include <sys/socket.h> int socket(int domain, int type, int protocol); The socket() function behaves similarly to open(), creating a communication endpoint for network interaction. On su...
Introduction While earlier implementations provided foundational packet capture capabilities, modern Linux kernels support AF_PACKET Version 3 (V3), delivering substantial performance improvements over both V1 and V2. (Version 2 primarily enhanced timestamp precision from microseconds to nanoseconds...
Accessing local network configuration parameters such as the host identifier, IP addresses, and MAC addresses is a fundamental requirement in many desktop applications. The Qt Network module provides a dedicated set of classes—QHostInfo, QNetworkInterface, and QNetworkAddressEntry—to accomplish this...