Practical articles about IP addresses, IPv6, and network connectivity.
理解 IP 地址的作用、分类与基本结构。Understand the role, types, and basic structure of IP addresses.
公网 IP 与内网 IP 有何不同，为什么你的路由器只分配内网地址。How public and private IPs differ, and why your router hands you a private address.
IPv6 是什么、为什么需要它，以及与 IPv4 的关键差异。What IPv6 is, why it matters, and how it differs from IPv4.
在 Windows、macOS、Linux 与移动端检测 IPv6 连通性的多种方法。Multiple ways to test IPv6 connectivity on Windows, macOS, Linux, and mobile.
