Layer 3 of the OSI (Open Systems Interconnection) – Network Layer
Layer 3 of the OSI model is known as the Network Layer. Here’s a breakdown of its main functions: Some common protocols that operate at the Network Layer include: In…
How Verizon and a BGP Optimizer Knocked Large Parts of the Internet Offline Today
Massive route leak impacts major parts of the Internet, including Cloudflare What happened? Today at 10:30UTC, the Internet had a small heart attack. A small company in Northern Pennsylvania became…
What is a Gateway?
A gateway is a network node used in telecommunications that connects two networks. A gateway is a network node used in telecommunications that connects two networks with different transmission protocols.…
How to Fix “No route to host” SSH Error in Linux
SSH is the most secure means of connecting to Linux servers remotely. And one of the common errors encountered while using SSH is the “ssh: connect to host port 22:…
What is DNS, and How Does DNS Work? (Domain Name Server Fundamentals)
What if you had to memorize the IP address of every website that you wanted to visit? I bet you’d go crazy in no time! This is where DNS jumps…