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Week 10 & Wrap Up - Vulnerable Networks and My Blogging Goodbye

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You’d think connecting computers and devices together would be simple, but networking is full of hidden vulnerabilities that can make even seasoned pros sweat. From misconfigured firewalls to weak passwords left unchanged for years, like passwords literally being "password", the doors to trouble are everywhere. Once you're online, you're not just talking to your team, you’re basically yelling into a hallway where anyone might be listening. Phishing attacks, man-in-the-middle interceptions, outdated protocols… it’s an endless buffet of risk if you’re not careful. The good news? With strong encryption, regular updates, and a dash of paranoia, most threats can be dodged.  Well, we've finally made it to this point. The end of the course and the end of this blog journey. If you’ve been following along, first off, thank you. It means a lot that you took the time to read.  Honestly, the whole blogging-for-a-grade experience felt a bit forced. I get the intention, b...
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Week 9 - Your Network’s Digital Security Guard

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Imagine a firewall as the bouncer outside your network’s club. No one gets past them except for the ones on the guest list. In cybersecurity, a firewall is a tool that monitors and filters incoming and outgoing traffic between your device and the internet. Its job? Keep the sketchy, dangerous stuff out. Firewalls protect your network from all kinds of digital threats like viruses, hackers, phishing attempts, and malware looking for a way in. You've got two options: A software firewall that lives on your device monitoring your apps/device activity and a hardware firewall that mans the gates, keeping unwanted travels from entering your domain. In short, firewalls create a secure boundary. Without them, your network’s wide open to the chaos of the internet.
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Week 8 - One Machine Many Hats

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Think of virtualization like turning one apartment into several cozy studios. Each room has its own privacy, setup, and purpose, but they still all exist in the same building. That’s kind of what virtualization does to your computer or server. A hypervisor manages all those virtual "rooms" called Virtual Machines or VMs and makes sure they don’t mess with each other.   Virtual Machines (VMs) are the "rooms" like minicomputers within your real computer. You can run different operating systems or apps on each one. Instead of having a separate physical device for each task, virtualization uses the hypervisor to split one machine into several virtual ones. Each guest at the party gets their own space and drinks from their own cup. It’s efficient, saves money, and makes IT way more flexible. Especially for businesses running dozens or hundreds of apps. One box can now have many different capabilities.
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Week 7 - Cutting the Cord

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     Let’s face i t, nobody loves being tied down by cables. Wireless networking is what lets our laptops, phones, and smart devices  connect to the Internet  without dragging around a bundle of cords. It all runs on radio waves, with routers and access points acting as the middlemen. If y ou’ve heard of Wi-Fi standards like 802.11ac or the newer Wi-Fi  6, they basically determine  how fast and smooth your connection is.  Another cool thing is you  can stream, game, or work from almost anywhere in your house.  On the security side, WPA3  or WPA2  keeps things locked down from random hackers.   Wireless networking keeps us moving, working, and googl in g all cable-free.
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Week 6 - The Internet’s New Address Book

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If you haven't heard already, as of 2025, we're effectively out of all available IPv4 addresses. So, what do we do now? That's where IPv6 comes in. It's the next-gen internet protocol designed to give us way more IP addresses. When I say more, I'm talking about in the trillions! While IPv4 uses 32-bit addresses, IPv6 uses 128-bit, meaning every smart fridge, phone, toaster, etc. can have its unique address without breaking a sweat. IPv6 also improves routing, security, and auto-configuration. It's like upgrading from a crowded apartment to a mansion with room to grow. Most of us won't notice the switch because it's common for most routers on the internet to be in a dual-stack configuration. But behind the scenes, it's helping the internet keep up with our connected lives.
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Week 5 - DNS: The Internet's Phonebook

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     In order to find a website, your PC needs to know its IP address. However, most people use a URL, like google.com, when searching the internet . Then how does your PC get the IP address when you give it a URL? That’s where the Domain Name System (DNS) comes in. Think of it as the internet’s phonebook. Instead of memorizing a bunch of IP addresses (like 142.250.190.14), DNS translates the URL, also known as a “hostname,” into computer-friendly IP addresses behind the scenes.      Here’s how it works: You type a URL, and your device checks its local DNS cache. Your PC stores these IP addresses locally for quick translation when attempting to reach a site you’ve visited before. If the IP doesn’t exist in the cache, it hits up a recursive DNS server, which does the legwork by contacting other DNS servers such as the root servers, TLD servers (like .com or .org), and the authoritative server for that domain. Once the IP is found, it is handed back to your...
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Week 4 - Managing IPs like the Pros

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Subnetting might sound like something only networking gurus need to worry about, but it’s actually a smart method for managing IP addresses. You can think of it like slicing a pizza (your network) into smaller, manageable pieces (subnets) so everyone has a fair share with no overlap. This can help reduce congestion and tighten security by separating the network traffic. You can also customize how many hosts per subnet by using variable length subnet masking (VLSM) to avoid handing out more addresses than you need. For anyone like myself who is learning or prepping for certifications, getting a good grasp of subnetting is a must-have tool in your toolkit.
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