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28 articles

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Apr 2, 2026 · Fundamentals

Master the Linux Network Stack: A Complete Illustrated Guide

This comprehensive tutorial walks through the Linux networking stack—from basic concepts, physical and data‑link layers, and addressing schemes to routing protocols, TCP/UDP transport mechanisms, application‑layer services like DNS and HTTP, and security fundamentals—providing clear explanations, step‑by‑step processes, formulas, and visual diagrams to help readers understand how each layer works and interacts.

LinuxNetwork StackNetworking Fundamentals

0 likes · 64 min read

Master the Linux Network Stack: A Complete Illustrated Guide

Linux Tech Enthusiast

Jan 18, 2026 · Fundamentals

A Visual Guide to TCP, UDP, Flow Control, and Congestion Control

This article explains TCP and UDP fundamentals, detailing TCP header fields, flow‑control and congestion‑control mechanisms, the three‑way handshake and four‑way termination, UDP’s connectionless nature, and a side‑by‑side comparison of the two protocols.

Flow ControlNetwork ProtocolsNetworking Fundamentals

0 likes · 11 min read

A Visual Guide to TCP, UDP, Flow Control, and Congestion Control

IT Services Circle

Oct 14, 2025 · Fundamentals

Why 8.8.8.8 Became the Internet’s Most Famous DNS Address – History and Benefits

This article explains how Google’s public DNS address 8.8.8.8 rose from a simple, memorable IP to a globally trusted service by offering speed, stability, security, and universal accessibility, while also covering the basics of DNS, its evolution, and whether it’s still needed today.

DNSGoogle Public DNSIP address

0 likes · 8 min read

Why 8.8.8.8 Became the Internet’s Most Famous DNS Address – History and Benefits

Cognitive Technology Team

Jun 1, 2025 · Fundamentals

Understanding TCP and UDP Sockets and Port Usage

This tutorial explains the basic concepts of TCP and UDP protocols, their differences, how network ports work, and demonstrates through examples whether TCP and UDP sockets can share the same port number.

Networking FundamentalsSocketsTCP

0 likes · 7 min read

Understanding TCP and UDP Sockets and Port Usage

System Architect Go

Aug 24, 2024 · Fundamentals

How Does an HTTP Request Travel Across the Internet? A Step‑by‑Step Journey

This article explains in detail how an HTTP request moves from a user’s device through Wi‑Fi, routers, modems, ISP NAT devices, and finally reaches the application server, illustrating each OSI layer and the transformations that occur along the way.

DNSHTTPNetworking Fundamentals

0 likes · 6 min read

How Does an HTTP Request Travel Across the Internet? A Step‑by‑Step Journey

Liangxu Linux

Jun 30, 2024 · Fundamentals

Why localhost and 127.0.0.1 Aren’t the Same: Key Differences Explained

The article explains that while localhost and 127.0.0.1 both point to the local machine and are often interchangeable, localhost is a hostname resolved via the hosts file, whereas 127.0.0.1 is the loopback IP address, and it also covers their IPv6 counterpart ::1, their similarities, differences, and usage scenarios.

127.0.0.1IPv4IPv6

0 likes · 6 min read

Why localhost and 127.0.0.1 Aren’t the Same: Key Differences Explained

Test Development Learning Exchange

May 26, 2024 · Fundamentals

Understanding HTTP Status Codes and the OSI/TCP‑IP Models: A Complete Guide

This article explains the purpose and classification of HTTP status codes—from informational 1xx to server error 5xx—while also providing an in‑depth walkthrough of the OSI seven‑layer model and its TCP/IP counterpart, detailing each layer’s role, protocols, and typical devices.

HTTPNetworking FundamentalsOSI model

0 likes · 7 min read

Understanding HTTP Status Codes and the OSI/TCP‑IP Models: A Complete Guide

Efficient Ops

May 5, 2024 · Fundamentals

Master Computer Network Fundamentals with 38 Comprehensive Mind Maps

This article presents a curated collection of 38 detailed mind maps that systematically cover essential computer network concepts—from transmission media and Ethernet frames to IP addressing, routing protocols, VLANs, and VPNs—helping readers visualize and master the fundamentals efficiently.

Computer NetworksIPv6Network Protocols

0 likes · 5 min read

Master Computer Network Fundamentals with 38 Comprehensive Mind Maps

Architects' Tech Alliance

Apr 4, 2024 · Fundamentals

Master Computer Networking Basics with 38 Comprehensive Mind Maps

This article compiles 38 detailed mind maps covering the entire computer networking curriculum—from the TCP/IP stack and transport protocols to routing, switching, VLANs, IPv6, and security technologies—providing a systematic visual guide for learners to quickly grasp and retain core concepts.

Computer NetworksIPv6Networking Fundamentals

0 likes · 7 min read

Master Computer Networking Basics with 38 Comprehensive Mind Maps

Java Tech Enthusiast

Feb 27, 2024 · Fundamentals

Why Do Most Home IPs Start with 192.168? Uncover the Secrets of IPv4 Addressing

This article explains what an IP address is, how IPv4 and IPv6 differ, why the 192.168.x.x range dominates home networks, the role of CIDR and private versus public addresses, and practical ways to view your own internal and external IP using common command‑line tools.

CIDRIP addressIPv4

0 likes · 15 min read

Why Do Most Home IPs Start with 192.168? Uncover the Secrets of IPv4 Addressing

Liangxu Linux

Sep 3, 2023 · Fundamentals

Why Ethernet Cabling Is Limited to 100 Meters – Physics, Standards, and Practical Tips

This article explains why wired Ethernet cabling is capped at 100 meters, covering the physical reasons, the 5‑4‑3‑2‑1 rule, differences between Cat 5, Cat 5e, and Cat 6 cables, and practical considerations for real‑world installations.

Cat5Cat6Network Cabling

0 likes · 9 min read

Why Ethernet Cabling Is Limited to 100 Meters – Physics, Standards, and Practical Tips

Liangxu Linux

Jun 22, 2023 · Fundamentals

Why Only 13 DNS Root Servers? History, Limits, and Modern Solutions

This article explains the DNS hierarchy, details the 13 official root servers, describes how priming queries work, why the 512‑byte UDP limit created a technical bottleneck, and how label compression, EDNS0, Anycast and server renaming have allowed the system to scale beyond the original constraints.

AnycastDNSEDNS0

0 likes · 17 min read

Why Only 13 DNS Root Servers? History, Limits, and Modern Solutions

21CTO

Feb 5, 2023 · Fundamentals

How Vinton Cerf Shaped the Internet: The Story Behind the IEEE Medal of Honor

Vinton Cerf, often called the "father of the Internet," received the IEEE Medal of Honor in 2023 for his pivotal role in designing TCP/IP, promoting internet adoption at Google, and earning multiple prestigious awards that underscore his lasting impact on global connectivity.

IEEE Medal of HonorInternet HistoryNetworking Fundamentals

0 likes · 3 min read

How Vinton Cerf Shaped the Internet: The Story Behind the IEEE Medal of Honor

IT Services Circle

Jan 27, 2023 · Fundamentals

Why Most IP Addresses Start with 192.168 – A Deep Dive into IPv4, Private/Public IP, CIDR and NAT

This article explains the fundamentals of IP addressing, why IPv4 addresses like 192.168.xx.xx are so common, how IPv4 is structured, the historical classful system, CIDR notation, private versus public IP ranges, NAT translation, and practical ways to view your own IP on various devices.

CIDRIP addressIPv4

0 likes · 15 min read

Why Most IP Addresses Start with 192.168 – A Deep Dive into IPv4, Private/Public IP, CIDR and NAT

Liangxu Linux

Dec 28, 2022 · Fundamentals

Why Can You Ping 127.0.0.1 When Offline? Understanding Loopback and IP Basics

This article explains why the loopback address 127.0.0.1 (and its alias localhost) can still be pinged without a network connection, describes the differences among 127.0.0.1, localhost and 0.0.0.0, and details the kernel mechanisms that handle local traffic.

0.0.0.0IP addressNetworking Fundamentals

0 likes · 13 min read

Why Can You Ping 127.0.0.1 When Offline? Understanding Loopback and IP Basics

Architects' Tech Alliance

Nov 13, 2022 · Fundamentals

Understanding TCP vs UDP: Handshakes, Data Transfer, and Key Differences

This article explains how TCP and UDP operate at the transport layer, compares their reliability and speed, details the TCP three‑way handshake and four‑way termination processes, and outlines how each protocol handles data segmentation, ordering, and loss.

Data TransmissionFour-way terminationNetworking Fundamentals

0 likes · 9 min read

Understanding TCP vs UDP: Handshakes, Data Transfer, and Key Differences

Architects' Tech Alliance

Jul 3, 2022 · Fundamentals

Mastering Computer Networks: From Physical Layer to Application Protocols

This article provides a comprehensive, layer‑by‑layer overview of computer networking, covering network classifications, OSI/TCP‑IP models, physical and data‑link devices, IP addressing and routing, transport‑layer protocols such as TCP and UDP, and key application‑layer services like DNS, DHCP, HTTP and HTTPS.

Computer NetworksNetwork ProtocolsNetworking Fundamentals

0 likes · 23 min read

Mastering Computer Networks: From Physical Layer to Application Protocols

Liangxu Linux

Jun 12, 2022 · Fundamentals

Understanding NAT: Public vs Private IPs, Types, and Server Setup

This article explains how NAT enables multiple private devices to share a single public Internet connection, covering public and private IP concepts, the four NAT types (static, dynamic, NAPT, Easy IP), server port‑mapping configuration, and the advantages and drawbacks of using NAT.

Dynamic NATNAPTNAT

0 likes · 11 min read

Understanding NAT: Public vs Private IPs, Types, and Server Setup

Liangxu Linux

May 26, 2022 · Fundamentals

A Beginner’s Guide to VLANs, Routing, Gateways, DNS, MAC and Subnet Masks

This article explains the concepts of VLANs, single‑arm routing and layer‑3 switches, gateways, DNS, MAC addresses, and subnet masks, using simple analogies and diagrams to show how network segmentation and communication work together in modern LAN environments.

DNSMAC addressNetworking Fundamentals

0 likes · 11 min read

A Beginner’s Guide to VLANs, Routing, Gateways, DNS, MAC and Subnet Masks

Liangxu Linux

Apr 25, 2022 · Fundamentals

Why IPv4 Isn’t Exhausted Yet: A Deep Dive into Global IP Allocation

This article explains how IPv4 addresses are structured, why the world hasn't run out of them despite early warnings, how the IANA‑RIR‑ISP hierarchy distributes them, and provides detailed statistics on China's IPv4 holdings and the challenges slowing IPv6 adoption.

ChinaIP addressingIPv4

0 likes · 10 min read

Why IPv4 Isn’t Exhausted Yet: A Deep Dive into Global IP Allocation

Selected Java Interview Questions

Mar 21, 2022 · Fundamentals

Understanding the OSI and TCP/IP Network Layer Models

This article explains the OSI seven‑layer model and the TCP/IP four‑layer model, describing each layer's responsibilities, protocols, and a step‑by‑step example of how an email travels from the application layer down to the physical medium and back.

Networking FundamentalsOSI modelProtocols

0 likes · 16 min read

Understanding the OSI and TCP/IP Network Layer Models

Top Architect

Sep 18, 2021 · Fundamentals

Understanding URLs, IP Addresses, Domain Names, DNS and the Domain Name Resolution Process

This article explains the concepts of URLs, IP addresses, domain names, the DNS system, its hierarchical structure, and the step‑by‑step process of domain name resolution, providing a clear foundation for networking fundamentals and interview preparation.

DNSDomain NameDomain Name System

0 likes · 12 min read

Understanding URLs, IP Addresses, Domain Names, DNS and the Domain Name Resolution Process

Efficient Ops

Apr 29, 2021 · Fundamentals

Mastering DNS: From Basics to Advanced Configuration and Security

This article explains the fundamentals of the Domain Name System, its distributed architecture, TCP/UDP usage, hierarchical structure, top‑level domains, resolution workflow, caching, smart routing, BIND configuration, load balancing, sub‑domain delegation, debugging tools, and security considerations such as amplification attacks.

BINDDNSDomain Name System

0 likes · 19 min read

Mastering DNS: From Basics to Advanced Configuration and Security

Architects' Tech Alliance

Nov 28, 2020 · Fundamentals

Understanding MPLS: Principles, Architecture, and Implementation

This article provides a comprehensive overview of Multiprotocol Label Switching (MPLS), covering its origins, definition, working principles, architectural components, label operations, LSP creation, and deployment methods, illustrating how MPLS enhances routing efficiency, VPN services, traffic engineering, and QoS in modern networks.

LSPLabel SwitchingMPLS

0 likes · 12 min read

Understanding MPLS: Principles, Architecture, and Implementation

Architecture Digest

Oct 13, 2020 · Fundamentals

Understanding TCP Protocol: Header Fields, Three‑Way Handshake, and Four‑Way Teardown

This article explains the TCP protocol’s header structure, the purpose of each field, how the three‑way handshake establishes a reliable connection, why three steps are needed, and the four‑step process used to gracefully close a TCP session, including verification with Wireshark.

Four‑Way TeardownNetworking FundamentalsTCP

0 likes · 13 min read

Understanding TCP Protocol: Header Fields, Three‑Way Handshake, and Four‑Way Teardown

Liangxu Linux

Aug 24, 2020 · Fundamentals

Mastering TCP: How the Three‑Way Handshake and Four‑Way Teardown Work

This article explains TCP's core mechanisms, detailing the three‑way handshake and four‑way termination processes, the meaning of ACK, SYN, and FIN flags, and the eleven connection states with their roles in establishing and gracefully closing a reliable network connection.

Connection StatesFour-way terminationNetworking Fundamentals

0 likes · 8 min read

Mastering TCP: How the Three‑Way Handshake and Four‑Way Teardown Work

Efficient Ops

Jun 26, 2019 · Fundamentals

Why Does TCP Need a Three‑Way Handshake and a Four‑Way Teardown? Explained

This article explains the OSI model, the TCP/IP protocol suite, and in detail how TCP establishes connections with a three‑way handshake and terminates them with a four‑way handshake, including the reasons behind each step and related security considerations.

HandshakeNetworking FundamentalsOSI model

0 likes · 12 min read

Why Does TCP Need a Three‑Way Handshake and a Four‑Way Teardown? Explained

Java Captain

Mar 4, 2019 · Fundamentals

Understanding the OSI 5‑Layer Model: How Computers Locate and Communicate with Each Other

This article explains, in plain language, how the five‑layer OSI model enables two distant computers to discover each other, establish a connection, and reliably exchange data by detailing the roles of the physical, data‑link, network, transport, and application layers.

IP addressingMAC addressNetworking Fundamentals

0 likes · 12 min read

Understanding the OSI 5‑Layer Model: How Computers Locate and Communicate with Each Other