This article presents a series of experiments comparing HTTP/1.1 and HTTP/2 request merging versus splitting, analyzing how concurrency, multiplexing, and header compression affect page load times for small images, large assets, and JavaScript under various network conditions.
This article explains the fundamental differences between RPC and HTTP services, covering the OSI model, RPC architecture, synchronous vs asynchronous calls, and popular open‑source RPC frameworks such as gRPC, Thrift, and Dubbo, to help developers choose the right approach for large‑scale systems.
This article explains the end‑to‑end live‑streaming workflow, covering how a broadcaster pushes video and audio to a server, the various streaming protocols (RTMP, HTTP‑FLV, HLS, RTP), encoding formats, FFmpeg‑based decoding, hardware vs software decoding, and audio‑video synchronization techniques.
This article explains the fundamental differences between RPC and HTTP services, reviews the OSI network model, describes RPC architecture and sync/async calls, compares popular RPC frameworks such as gRPC, Thrift, and Dubbo with traditional RESTful HTTP, and offers guidance on choosing the right approach for a project.
This article provides a comprehensive overview of computer networking fundamentals, covering the essence of network communication, distributed packet‑switching, layered protocol design, congestion‑control mechanisms, the evolution of network technologies, and security considerations, all aimed at helping engineers and students build a solid networking foundation.
This article reviews the pioneering SPDY protocol that inspired HTTP/2, then delves into Google's disruptive QUIC protocol—explaining its UDP foundation, Diffie‑Hellman encryption, connection migration, and advanced features that overcome TCP limitations, while comparing their roles in modern web communication.
This article reviews the evolution of web communication protocols, detailing SPDY's pioneering features that influenced HTTP/2 and exploring QUIC's disruptive UDP‑based design, security mechanisms, multiplexing, connection migration, and other enhancements that reshape modern internet performance.
This article explains how Chrome uses multiple processes, the fundamentals of TCP/IP reliability, the HTTP request lifecycle, caching mechanisms, and the step‑by‑step flow from entering a URL to rendering a page, providing essential knowledge for front‑end interviews.
This article explains the role of the transport layer in the OSI model, compares TCP and UDP protocols, describes socket types and their APIs, clarifies port number usage, and details multiplexing, demultiplexing, and UDP packet structure with checksum calculation.
This article explains the fundamental differences between RPC and HTTP services, covering OSI layers, RPC architecture, synchronous and asynchronous calls, and popular RPC frameworks such as gRPC, Thrift, and Dubbo, while also comparing their suitability for large‑scale versus small‑scale applications.
This article explains how the Network File System (NFS) enables file sharing across heterogeneous operating systems, describes the limitations of traditional NFS for high‑performance computing, and introduces pNFS (NFSv4.1) with its three protocols, layout types, and performance advantages for large‑scale parallel storage.
This article traces the history of computer networking from early batch processing and time‑sharing systems through the emergence of LAN, WAN, TCP/IP, OSI model, and modern protocols, while explaining key concepts such as packet switching, routing, delay types, and physical media.
This article provides a comprehensive overview of computer networking fundamentals, covering its historical evolution, network architectures, key protocols such as TCP/IP and OSI, transmission methods, switching techniques, performance metrics, and the physical media that enable modern internet communication.
This article explains the DLNA standard, its layered architecture, core functions, required protocols such as UPnP, SSDP, and SOAP, and provides a step‑by‑step guide for implementing video casting from a mobile control point to a DLNA‑compatible device.
This article provides a systematic, hands‑on guide to DNS fundamentals—including dig queries, hierarchical lookups, Wireshark packet analysis, traditional DNS drawbacks, and HTTPDNS solutions—followed by a deep dive into WebSocket mechanics, handshake, frame structure, and security considerations, all illustrated with practical examples and code.
This article explains the differences between FTP, FTPS, and SFTP protocols, their security features, and how active and passive transfer modes work, helping you choose the right settings for reliable file management in cloud storage.
This article explains the basics of FTP, its secure extensions FTPS and SFTP, and compares active and passive transfer modes, helping readers choose the right protocol and configuration for reliable file transfers in cloud storage scenarios.
This article explains the fundamentals, connection mechanisms, transfer modes, and security differences of FTP, TFTP, and SFTP, helping readers choose the appropriate protocol for their file transfer needs.
This article explains the evolution from HTTP/1.1 to HTTP/3, detailing QUIC's design, zero‑RTT connections, connection migration, head‑of‑line blocking elimination, multiplexing, congestion and flow control improvements, and why HTTP/3 is poised to become the next‑generation web protocol.
This article examines why IPv6, despite its technical advantages over IPv4, has seen slow global adoption, exploring the roles of NAT, compatibility challenges, and fine‑grained address management strategies that influence the transition.
This comprehensive guide explains the TCP/IP protocol suite, detailing each layer from the physical link to the application, and covers essential protocols such as IP, ARP, ICMP, DNS, as well as connection management techniques like three‑way handshake, four‑way termination, flow control, and congestion control mechanisms.
This article traces the evolution of HTTP from its early versions to HTTP/2 and QUIC, explains the shortcomings of HTTP/1.1 such as head‑of‑line blocking and lack of encryption, details the performance‑boosting features of SPDY, HTTP/2 and QUIC, and discusses the remaining challenges like connection latency, server load, and NAT traversal.
The author recounts eight interview experiences across companies like Afanti, XueTang Online, Guokr, Veeva, Zhihu, Spring Rain Doctor, 360, and Toutiao, sharing detailed insights on Python fundamentals, network protocols, system design, database concepts, and personal lessons that helped secure a final offer.
This article explains the fundamentals of the ARP (Address Resolution Protocol) and ICMP (Internet Control Message Protocol), describing how they operate in LAN environments, detailing their packet structures, and illustrating their practical use through ping and tracert commands with packet capture analysis.
The article surveys IoT architecture and Wi‑Fi’s role as the primary connectivity layer, then details six Wi‑Fi provisioning techniques—direct UART/SPI, WPS, web‑based AP, SoftAP, SmartConfig/SmartConnection, and sound‑wave—comparing their advantages, limitations, and suitability for different product, cost, and environmental constraints.
Despite China's push for IPv6, mobile devices face uneven dual‑stack support, with iPhone and Android handling APN settings, carrier configurations, address allocation, Happy Eyeballs selection, NAT, MTU and firewall nuances, revealing practical challenges and technical details of IPv6 deployment on mobile networks.
Zhang Peng’s talk detailed Tencent Cloud’s X‑P2P system, which combines raw FLV/FMP4 segmentation, adaptive bitrate switching, and the XNTP transport to achieve 60‑80% peer share and CDN‑level latency, while handling diverse NAT types, employing balanced topology, and positioning the technology for 4K, 5G, IPv6 and edge‑computing futures.
Using Wireshark, this article dissects a complete HTTP request, explaining the TCP three‑way handshake, window scaling, SACK options, four‑step termination, and Keep‑Alive mechanisms, while illustrating each packet with screenshots and detailing how browsers may merge handshake steps for efficiency.
This article provides an in‑depth overview of TCP congestion control, covering the sliding‑window flow control, the congestion control state machine with its five states, and the four core algorithms—slow start, congestion avoidance, fast retransmit, and fast recovery—plus practical insights for middleware design.
This article explains the essential conditions for TCP communication, details the three‑step handshake and four‑step termination processes with packet‑capture illustrations, and discusses why these sequences ensure reliable connections between a client and a server.
The author shares detailed experiences from eight backend interview processes, covering Python basics, system design, network protocols, database fundamentals, and coding challenges, while offering practical advice and code examples for aspiring engineers.
This article explains the challenges of high‑performance computing and big‑data workloads on traditional TCP/IP stacks, introduces RDMA technology, its variants (InfiniBand, RoCE, iWARP), key protocols, hardware components, and how it achieves ultra‑low latency and high throughput with minimal CPU involvement.
Upcoming IETF discussions aim to replace the long‑standing TCP‑based HTTP with a new UDP‑based protocol, QUIC, rebranded as HTTP/3, offering lower latency and improved security, while distinguishing Google’s gQUIC from the IETF’s iQUIC and gaining industry support.
This article provides a comprehensive collection of reverse‑shell techniques—including Perl, Bash, Python, PowerShell, Java, and protocol‑specific methods like ICMP, UDP, and DNS—complete with command‑line examples, code snippets, and practical tips for both Linux and Windows environments.
This article provides a comprehensive overview of Remote Direct Memory Access (RDMA), detailing its underlying principles, performance advantages over traditional TCP/IP, various protocol families such as InfiniBand, RoCE, and iWARP, and their respective hardware and software requirements.
The article uses a quirky long‑distance video‑chat scenario to illustrate TCP’s three‑way handshake and four‑way termination, explaining the protocol’s packet format, flag meanings, SYN‑attack risks, and step‑by‑step connection establishment and teardown.
This article explores TCP/IP fundamentals—including three‑way handshake, receive windows, congestion control mechanisms, and HTTP header limits—while demonstrating practical packet captures with tcpdump and building a simple WebSocket chat demo to illustrate protocol behavior and differences from WebRTC.
This comprehensive guide explains the OSI and TCP/IP layered architectures, IP address classes, TCP three‑way handshake and four‑way termination, key network protocols, the DNS resolution process, and the step‑by‑step flow when a browser accesses www.baidu.com, providing essential networking fundamentals for developers.
The article explains why TCP‑based protocols cannot meet low‑latency requirements for live‑streaming conferences and introduces RTP, RTCP, jitter, round‑trip time, and three packet‑loss mitigation strategies—retransmission, forward error correction, and cross‑transport—along with a brief overview of DCCP for congestion control.
In this whimsical interview, the aging Internet Explorer, Firefox, and Chrome discuss their rivalry, the evolution of browsers, how they fetch web pages via HTTP requests and responses, status codes, cookies, and the challenges of modern web technologies, offering a clear overview of web fundamentals.
This article explains how HTTP relies on TCP/IP, clarifies the stateless nature of HTTP, and compares long‑lasting persistent connections with short‑lived ones, covering their handshakes, advantages, disadvantages, and appropriate usage scenarios.
This article explains what network protocols are, why layered designs simplify communication, and compares the OSI seven‑layer model with the TCP/IP reference model, detailing each layer’s functions, typical protocols, and practical examples.
