What Do Those Numbers Mean? A Guide to Common Network Protocol Numbers

This article explains the role of protocol numbers in IP headers, introduces common network protocols such as ICMP, TCP, UDP, GRE, and VRRP with their assigned numbers and typical use cases, and shows how to locate the official list via IANA for troubleshooting and configuration.

IANAICMPNetwork Protocols

0 likes · 4 min read

What Do Those Numbers Mean? A Guide to Common Network Protocol Numbers

Open Source Linux

Dec 23, 2021 · Fundamentals

How Many IPv4 Addresses Exist? Uncovering Global, Chinese, and Alibaba Cloud IP Pools

This article explains the total number of IPv4 addresses worldwide, details China's allocated IPv4 blocks, shows how to extract and sum them using a script, and compares the IP holdings of major Chinese cloud providers and global giants like Amazon.

Alibaba CloudChinaIANA

0 likes · 8 min read

How Many IPv4 Addresses Exist? Uncovering Global, Chinese, and Alibaba Cloud IP Pools

Liangxu Linux

Dec 12, 2021 · Fundamentals

How Many IPv4 Addresses Does China Really Have? Exploring IANA, APNIC, and Cloud Providers

This article explains the total number of IPv4 addresses worldwide, details special‑purpose ranges, shows how to retrieve and parse APNIC’s allocation data to calculate China’s share, compares figures from CNNIC and cloud providers like Alibaba Cloud, and highlights the discrepancy between advertised and actual address pools.

APNICChinaCloud Computing

0 likes · 8 min read

How Many IPv4 Addresses Does China Really Have? Exploring IANA, APNIC, and Cloud Providers