Why ISPs and enterprises rely on CIDR for routing efficiency
How CIDR groups addresses and summarizes routes: a worked /22 example, prefix lengths, routing benefits and the limits of aggregation.
The team’s articles
Articles
How the internet works
13–22 of 22
Understanding the Difference Between Public and Private IPs
Why your device and a website show different IP addresses: private ranges, NAT, public reachability and the security controls that actually matter.
Why NAT (Network Address Translation) Still Matters in 2025
How NAT lets devices share a public address, how replies find their way back, and what address sharing changes for security, applications and operator choice.
4G vs 5G: Comparative Overview
Explore the key differences between 4G and 5G—speed, latency, and network capacity. Discover how 5G is transforming technology and connectivity!
Discover the Internet Engineering Task Force (IETF)
How does the IETF help networks work together? Understand RFCs, voluntary standards and Lu Heng’s distinction between coordination and control.
Top-Level Domains (TLDs) and the Significance of .HELP
What does .HELP tell a visitor? Understand domain endings, the people behind a name, and Lu Heng’s case for coordination without permanent gatekeepers.
Understanding IPv4: The Foundation of the Internet
How IPv4 helps data find its destination, why devices can share an address, and why finite address space does not settle who should control a network.
Introduction to IPv6: The Future of Internet Addressing
What does IPv6 solve, and what work remains? Understand address space, coexistence costs and Lu Heng’s case for letting operators decide.
What is an IP Address?
An IP address delivers data; it does not prove ownership or give administrators authority to speak for users. Follow the number, record, route and right to leave.
Understanding Different Types of Internet Services
Get clear on Broadband, Fiber Optic, Cable, DSL, Satellite, Mobile Broadband & IP Address. Learn the different types of internet services!