This article explains the origins, technical classification, and evolution of the IP address 1.1.1.1 from an unassigned block to Cloudflare's fast, privacy‑focused public DNS, covering its network segment, Anycast deployment, encrypted DNS support, and comparison with other DNS services.
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.
iQIYI’s internal DNS evolved from a simple private‑cloud master/slave design into a multi‑layer Anycast architecture and, finally, a hybrid‑cloud solution that unifies private and public cloud name resolution through directional forwarding, proxy bridging, and automated management, delivering secure, low‑latency, globally consistent service.
The article compares major cloud providers’ acceleration offerings—showing Tencent and Alibaba support acceleration channels, AWS and Google provide Anycast, and Google alone offers a global network—then outlines suitable business scenarios for each option and explains how each vendor exposes the client’s real IP at Layer 4 and Layer 7.
This article explains how the DNS system works, describes the hierarchical structure of root, TLD, authoritative and local DNS servers, examines why there are only thirteen logical root servers (with thousands of physical mirrors), and evaluates whether blocking them could erase a nation's presence online.
The article explains how the Domain Name System works, describes the hierarchical structure of DNS including root, top‑level, and authoritative servers, and argues that even if root servers were blocked a nation would not disappear from the Internet because of distributed mirrors and anycast technology.
This article explains how the Domain Name System works, the role of root DNS servers and anycast, and why disabling those servers would not make a nation disappear from the Internet, highlighting the technical and geopolitical complexities involved.
This article explains the DNS resolution process, the hierarchy of root, top‑level, and authoritative servers, why there are only 13 root servers, and why the United States cannot easily cut off China’s Internet access.
After the US announced its “Clean Network” initiative, concerns arose about whether America could block national top‑level domains by controlling the 13 DNS root servers; this article explains DNS fundamentals, the role of root mirrors, historical shutdowns, and how China mitigates such risks.
The article explains how the DNS system works, why there are only 13 logical root servers, how anycast and global mirrors keep the system resilient, and evaluates the realistic risk of a nation‑state like the United States tampering with root zone data, especially for Chinese .cn domains.
This article explains how DNS works, why there are only 13 logical root servers, how root mirrors and anycast keep the system resilient, the historical control of root zones, and why the United States cannot easily block Chinese domains despite its dominance in root server ownership.
The article explains how DNS works, why there are only 13 logical root servers, how anycast distributes thousands of physical servers worldwide, the historical control the US has over most root servers, and what technical and policy measures China can use to protect its .cn domain from potential censorship.
The article explains how DNS works, why there are only 13 logical root servers, how anycast and mirror servers provide resilience, recounts historical cases of domain shutdowns, examines US control over root zones, and discusses mitigation strategies for protecting national domains.
This article explains the four primary IP transmission methods—unicast, multicast, broadcast, and anycast—detailing their address ranges, typical use cases, and how they differ in delivering data to one, many, or a selected recipient within a network.
A Chinese game studio faced a massive 300 GB DDoS ransom attack, refused to pay, and, with UCloud's elastic high‑availability and Anycast cleaning technologies, repelled the assault while detailing the attackers' methods and offering a public‑cloud DDoS mitigation guide.
This article explains the evolution of DDoS protection from early router‑based defenses to modern cloud‑native solutions, detailing UCloud's three‑module architecture, the role of Anycast in traffic dilution, and practical features that enable scalable, cost‑effective mitigation of large‑scale attacks.
Anycast assigns a single IP to multiple distributed DNS nodes, automatically routing queries to the nearest healthy server, which balances load, mitigates DDoS, and provides sub‑second failover; iQIYI’s internal tests confirmed UDP and TCP compatibility, enabling a self‑healing DNS deployment across data centers that cuts operational complexity and prepares for broader service use.
This guide explains how to create a personal CDN by deploying multiple edge servers, using Geo‑IP‑aware DNS routing, leveraging Amazon Route 53 latency‑based routing, synchronizing content, handling SSL with Let’s Encrypt, and evaluating performance across continents.
This guide explains why a custom CDN can outperform commercial services, walks through using geo‑aware DNS, BGP Anycast limitations, setting up edge servers, distributing static content, handling SSL certificates, and shares real‑world performance results and lessons learned.
This article explains what GSLB (Global Server Load Balancing) is, why achieving high availability, low latency, and accurate traffic distribution is difficult due to DNS limitations, caching, and routing constraints, and explores architectural and network‑level techniques such as feedback loops, anycast, and BGP routing to mitigate these challenges.
