Monday, December 10, 2018

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IPv4 Classes and CIDR

I wrote this article to discuss IPv4 classes and classless addressing and compare the two. Most companies make use of a classless network (or CIDR), so classful IP is not as important anymore. Because of this I have omitted most of the classful information from the upcoming A+ Exam Cram (to be released in 2019). But I do get...

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Laptop Upgrade Part 2 – HyperX RAM – Satellite E45

Part 2 of this laptop's upgrade. Here I upgrade the RAM on the system from the stock 6 GB to 16 GB. That completes...
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Laptop Upgrade Part 1 – Samsung 850 EVO – Satellite E45

In this video I demonstrate how to upgrade a magnetic-based hard disk drive in a laptop to a solid-state drive. In short: HDD to...
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Where to Find the Answers to Computer Technology Questions

In this 26 minute video, I give some advice on where to look for answers to technology questions and problems. The suggestions in the...

A+ 220-901 & 220-902 Study Page

Welcome to my CompTIA A+ 220-901 & 220-902 study page! The A+ certification is designed to test your skills with PCs, laptops, mobile devices,...

NVMe M.2 SSD Install – 960 PRO – 512 GB

Hello friends. Today I'm installing and testing a Samsung 960 PRO 512 GB NVMe M.2 SSD. Click to watch the video---20 minutes. Read on for...

Security+ SY0-501 Study Page

Welcome to my SY0-501 Study Page! The CompTIA Security+ SY0-501 certification shows employers that you have a broad understanding of computer security concepts. The...

NAS Box Install DS218+, WD 4 TB Red, RAID1, 4 GB...

Today I am installing a Synology DS218+ network attached storage (NAS) box and configuring it as a 4 TB RAID 1 array. Click to watch...

Key Stretching and Salting (Security+)

Examine the figure (click to enlarge). Questions: 1. What did I encrypt? 2. How many iterations (or rounds) were performed? (see answer below and video response) Answer I...

PRNGs (Security+) – Is Chance Predetermined?

Examine the figure. We are collecting noise to increase entropy. What type of algorithm are we developing here? (see answer below and video response.) Answer Based on...

Building a Computer Network (BACN) Video Course

Check out the Building a Computer Network video course. In the BACN course I build a "basic" network from scratch in my lab. The...