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Networking Basics

Network configuration settings displayed in a terminal interface.
Apr 5, 2019

You may not know it, but the IPv4 address of your computer contains tons of useful information about whatever Wi-Fi network you're on. By knowing what your IPv4 address and subnet mask are telling you ...

Global network connectivity concept with a digital globe.
Jan 23, 2016

Welcome back, my greenhorn hackers! In the first part of this series, I introduced you to the basics of networking including IP addresses, ports, NAT, and DHCP. In this lesson, I want to introduce you ...

Fiber optic cables connected to network equipment.
Dec 24, 2015

Welcome back, my greenhorn hackers! As expected with Null Byte's dramatic growth over the last year, we have added many new aspiring hackers who are still lacking in the basics of networking. In addit ...

"A Hitchhiker's Guide to the Internet: Today and Now, How It All Connects" cover image
Jul 2, 2013

In the first part of this series, we took a factual and technical look at the history of the Internet. I explained how all of these wires and servers got here in the first place. Obviously, a firm did ...

"Hacker Fundamentals: A Tale of Two Standards" cover image
Jul 2, 2013

If you read my article on the OSI model, you got a good overview on communications from that model's perspective, but how does that relate to TCP/IP? We're going to take it a step further, getting int ...

"Hacker Fundamentals: The Everyman's Guide to How Network Packets Are Routed Across the Web" cover image
Jul 2, 2013

In general, hacking and information security is not just one discipline, but a number of them, and today we will look into some of the networking concepts. In the last Hacker Fundamentals, we talked a ...

"A Hitchhiker's Guide to the Internet: A Brief History of How the Net Came to Be" cover image
Apr 19, 2012

You walk over to your laptop, wiggle your mouse to wake up the screen, then fire up your browser to come visit Null Byte. Catching the article about Anonymous and how they presumably will not take dow ...

"How to Spy on Your "Buddy's" Network Traffic: An Intro to Wireshark and the OSI Model" cover image
Mar 9, 2012

Wouldn't it be nice to just sit at your buddy's house, plug into his network, and see exactly what he's doing? What if it was as easy as that? What makes packet sniffers like Wireshark such potent too ...

"Hacker Fundamentals: A Gentle Introduction to How IP Addresses Work" cover image
Feb 28, 2012

Imagine you're in Paris and you need to get to Versailles. Looking around for directions, you come to a cold realization—you do not speak a lick of French! How are you going to get to Versailles and w ...