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Plain-English guides to IP addresses, networking, online privacy, and the history of the internet. 66 articles and growing.
🌐 History of the Internet
How a Cold-War research project became the network that connects the world.
- A Complete History of the Internet: From ARPANET to TodayHow the internet grew from a Cold-War research project into a global network — ARPANET, TCP/IP, the World Wide Web, and the modern internet, explained.
- What Was ARPANET? The Network That Started It AllARPANET was the first packet-switched network and the direct ancestor of the internet. Here's what it was, why it was built, and what it achieved.
- The Birth of TCP/IP: How the Internet Learned to SpeakTCP/IP is the common language that lets every network on Earth interconnect. Here's the story of how Vint Cerf and Bob Kahn designed it.
- The People Who Built the InternetThe internet had many parents. Meet the key figures — from packet-switching pioneers to the inventor of the Web — and what each of them contributed.
- The World Wide Web vs. the Internet: What's the Difference?People use 'the internet' and 'the Web' interchangeably, but they are not the same thing. Here's the difference, clearly explained.
- The History of DNS: How the Internet Got NamesBefore DNS, one hand-edited file mapped every hostname to an IP address. Here's how the Domain Name System replaced it and scaled to billions of names.
- Who Runs the Internet? ICANN, IANA, and the RIRs ExplainedNo single government or company owns the internet. Here's how names, numbers, and standards are actually coordinated worldwide.
- A Brief History of Web BrowsersFrom the first text browsers to Mosaic, Netscape, Internet Explorer, Firefox, and Chrome — how the window to the Web evolved.
- From Dial-Up to Broadband: How We Got OnlineThe screeching modem, the busy phone line, and the leap to always-on broadband. A short history of how home internet access evolved.
- A Short History of Wi-FiWi-Fi freed the internet from cables. Here's where wireless networking came from, how the standards evolved, and why it's called Wi-Fi.
- How Everything Got Connected: A Short History of the Internet of ThingsFrom a networked soda machine to billions of smart devices, here's how everyday objects joined the internet — and why it strained the address system.
🔢 How IP Addresses Work
IPv4, IPv6, subnets, and everything about the numbers that identify your device.
- What Is an IP Address? A Complete Beginner's GuideAn IP address is the number that identifies your device on a network. Here's what it is, how it works, and the difference between IPv4 and IPv6 — in plain English.
- Public vs. Private IP Addresses ExplainedYour device has both a public and a private IP address. Here's what each one does, how to tell them apart, and why the difference matters.
- Static vs. Dynamic IP AddressesSome IP addresses stay the same; others change over time. Here's the difference between static and dynamic IPs, and when each one is useful.
- How IPv4 Addresses Work: Structure and NotationIPv4 addresses are 32-bit numbers written as four octets. Here's how they're structured, how many exist, and why we ran out.
- Understanding Subnets and Subnet MasksSubnetting splits a network into smaller pieces. Here's what a subnet mask does and how to read one, without the intimidating math.
- What Is CIDR Notation?CIDR notation like 10.0.0.0/8 is a compact way to describe blocks of IP addresses. Here's how to read it and why it replaced address classes.
- What Is IPv6 and Why Do We Need It?IPv6 is the next-generation internet addressing system with a virtually unlimited supply of addresses. Here's what it is and why it exists.
- IPv4 vs. IPv6: A Detailed ComparisonHow do IPv4 and IPv6 actually differ? A side-by-side comparison of address size, format, features, and real-world use.
- How IPv6 Addresses Are Written and CompressedIPv6 addresses look intimidating, but the notation follows simple rules. Learn how to read, shorten, and expand them.
- What Is NAT (Network Address Translation)?NAT lets a whole network of devices share a single public IP address. Here's how it works and why it became essential.
- Reserved and Special-Use IP AddressesNot every IP address is for a public device. Learn about loopback, private ranges, link-local, and other special addresses you'll encounter.
- How Your Device Gets an IP Address: DHCP ExplainedYou rarely set an IP address by hand — DHCP does it automatically. Here's how the Dynamic Host Configuration Protocol works.
🔌 Networking Fundamentals
The protocols, models, and hardware that move your data from A to B.
- The OSI Model Explained, Layer by LayerThe OSI model breaks networking into seven layers. Here's what each layer does, with plain-English examples for all seven.
- The TCP/IP Model ExplainedThe TCP/IP model is the practical four-layer framework the real internet runs on. Here's how it maps to what actually happens on the wire.
- TCP vs. UDP: What's the Difference?TCP and UDP are the two main transport protocols. One is reliable, the other is fast. Here's when each is used and why it matters.
- What Is a Port Number? Common Ports ExplainedPorts let one device run many network services at once. Here's what port numbers are and a rundown of the most common ones.
- What Is a MAC Address?A MAC address is a hardware identifier burned into your network adapter. Here's how it differs from an IP address and what it's used for.
- How Routers WorkRouters are the traffic directors of the internet. Here's what they actually do, from your home box to the internet's core.
- Switches, Hubs, and Routers: What's the Difference?Switches, hubs, and routers all move network data, but they work very differently. Here's how to tell them apart.
- What Is DNS and How Does It Work?DNS turns human-friendly names like example.com into the IP addresses computers need. Here's the whole lookup process, step by step.
- What Is a Packet? The Anatomy of Network DataThe internet moves everything as packets — small, labeled chunks of data. Here's what's inside one and why packets make the internet resilient.
- Bandwidth vs. Latency: Why Your Fast Connection Feels SlowBandwidth and latency are different measures of network performance. Here's what each means and why a high-speed connection can still feel sluggish.
- What Is an Autonomous System (AS) and BGP?The internet is a network of large networks called Autonomous Systems, stitched together by BGP. Here's how the internet's biggest layer works.
- What Is a Reverse DNS (PTR) Lookup?A reverse DNS lookup turns an IP address back into a hostname. Here's how PTR records work and why they matter for email and diagnostics.
🛡️ IP, Privacy & Security
What your IP reveals, who can see it, and how to protect your privacy online.
- How IP Geolocation Works (and Why It's Often Wrong)IP geolocation estimates your location from your IP address. Here's how it's done, how accurate it really is, and why it's frequently off.
- What Can Someone Do With Your IP Address?Is it dangerous if someone knows your IP address? Here's an honest look at what your IP does — and doesn't — let others do.
- How to Hide Your IP Address: VPNs, Proxies, and TorThere are three main ways to hide your IP address. Here's how VPNs, proxies, and Tor compare, and when to use each.
- What Is a VPN and How Does It Work?A VPN encrypts your traffic and hides your IP address behind a server. Here's how VPNs work and what they can and can't protect.
- What Is a Proxy Server?A proxy server sits between you and the internet, relaying your requests. Here's what proxies do and how they differ from VPNs.
- What Is the Tor Network?Tor anonymizes your traffic by routing it through multiple volunteer relays. Here's how onion routing works and what Tor is good for.
- Does Your IP Address Reveal Your Identity?Can someone identify you personally from your IP address? Here's the nuanced, accurate answer — and who actually can.
- What Is an ISP and What Does It Know About You?Your internet service provider connects you to the internet — and sits in a position to see a lot. Here's what ISPs are and what they can observe.
- What Is a Firewall?A firewall controls what network traffic is allowed in and out. Here's how firewalls work and the different types you'll encounter.
🛠️ Everyday Internet & Troubleshooting
Practical guides to the things you actually run into: routers, URLs, HTTPS, ping, and more.
- What Is localhost and 127.0.0.1?localhost and 127.0.0.1 both mean 'this computer.' Here's what the loopback address is and why developers rely on it.
- What Is a Default Gateway?The default gateway is the device your traffic goes through to reach other networks. Here's what it is and how to find it.
- How to Find Your Router's IP AddressYour router's IP address is the gateway to its settings. Here's how to find it on any device and log in.
- What Is Port Forwarding?Port forwarding lets outside connections reach a specific device inside your network. Here's how it works and when you need it.
- Why Does My IP Address Change?Noticed your IP address is different than before? Here's why public IP addresses change, and when they don't.
- The Anatomy of a URLA URL packs a lot of information into one line. Here's what every part of a web address means, piece by piece.
- HTTP vs. HTTPS: What's the Difference?HTTPS is the secure version of HTTP. Here's what the 'S' adds, why it matters, and why nearly all sites use it now.
- What Is SSL/TLS?SSL/TLS is the encryption behind HTTPS and much of the secure internet. Here's what it does and how it works, without the heavy math.
- What Is a CDN (Content Delivery Network)?CDNs make the web fast by serving content from servers near you. Here's how they work and why nearly every big site uses one.
- Ping and Traceroute ExplainedPing and traceroute are the two most useful network troubleshooting tools. Here's what they do and how to read their output.
- What Is a DNS Cache, and How Do You Flush It?Your device remembers recent DNS lookups in a cache. Here's why that helps, when it causes problems, and how to clear it.
- What Is Carrier-Grade NAT (CGNAT)?Some ISPs share one public IP among many customers using carrier-grade NAT. Here's what CGNAT is and how it affects you.
- What Is DNS over HTTPS (DoH)?DNS over HTTPS encrypts your name lookups so others can't see or tamper with them. Here's what it is and its trade-offs.
- What Is a DDoS Attack?A DDoS attack overwhelms a target with traffic to knock it offline. Here's how these attacks work and how they're defended against.
🦆 The 'What's My IP' Sites
A deep history of the animal-mascot IP tools and the culture around them.
- A History of the 'What's My IP' WebsitesThe single-purpose 'what's my IP' tool is a small, enduring genre of the web. Here's where it came from and how it evolved.
- The IP Animal Websites: A Field GuideWhy does the 'what's my IP' genre have so many animal mascots? A friendly field guide to the creatures of the IP-lookup web.
- Why Are There So Many Animal-Themed IP Tools?The 'what's my IP' genre is oddly full of animal mascots. Here's the cultural and practical reasoning behind the trend.
- How 'What's My IP' Tools Actually WorkEver wondered how a website knows your IP address the instant you visit? Here's exactly how 'what's my IP' tools do it.
- The Anatomy of a 'What's My IP' PageGreat single-purpose tools share a design DNA. Here's what makes a 'what's my IP' page work, from the giant number to the details below.
- From Simple IP Lookups to Full Network ToolkitsMany 'what's my IP' sites grew into sprawling network toolkits. Here's how the genre expanded, and why minimalism still wins for many users.
- What Makes a Good 'What's My IP' Tool?Not all IP-lookup tools are created equal. Here are the qualities that separate a great one from a mediocre one.
- IP Ducky's Place in the FlockHow IP Ducky fits into the long tradition of 'what's my IP' tools — and what it does differently.