This will be blog posts that are related to the CompTIA Network+
Every time your computer talks to another on the internet, it will use a specific “Door” called a Port. There are 65,535 available ports, but for the Network+ And just daily IT life, We will only need to master the…
Computers love numbers (IP addresses), but humans love names (google.com). DNS is the translation service that sits in the middle. Without it, you’d have to memorize 142.250.190.46 just to check you email. 1. The DNS Hierarchy: How it Finds the…
We ran out of IPv4 addresses years ago, To keep the world connected, we created IPv6. While IPv4 gave us about 4.3 billion addresses, IPv6 gives us 340 unidecillion that is going to be 36 zero’s. In today’s post, we’re…
Subnetting is the process of taking a large network, and carving it into smaller, more manageable pieces. Why do we do it? 1. The Foundation: Binary and Bits To understand subnets, we need to remember that a computer can only…
Laster week, we climbed the 7-layer mountain of the OSI Model. While that model is great for learning, it’s mostly theoretical. In the real world. Your computer will use the TCP/IP Model (also known as the DoD Model) Today, we’re…
The Presentation Layer (Layer 6) As we move toward the top of the stack, we stop worrying about how data is sent and start worrying about the format of the data itself, Welcome to Layer 6: The Presentation Layer If…
We’ve built the road, addressed the enevelopes, and ensured the delivery was reliable, Now, we will need to manage the actual conversation between two devices. Welcome to Layer 5: The Session Layer Often overlooked because it works so seamlessly in…
We’ve moved data across wires, switched it through local ports, and routed it across the internet. Now, we need to make sure that data is actually usable. Welcome to Layer 4: The Transport Layer. This is the first “End-to-End” layer.…
We’ve handles the wires (Layer 1) and the local hardware addresses (Layer 2). But what happens when you want to send data to a server in a different city, or even just a different building on campus? Welcome to Layer…
Yesterday, we discussed the wires and the bits. But bits are just noise unless we have a way to organize them and ensure they get to the right person. Welcome to Layer 2: The Data Link Layer. This is the…