Curated Video
Debunking Viral Video Mysteries: The Science Behind the Sensations
Dive into the world of viral videos where breathtaking feats challenge belief. From a wingsuit flyer allegedly landing on water without a parachute to a teenager sending a toy to the stratosphere, we explore the science that supports or...
Curated Video
Connecting Across Continents: The Evolution of Video Calls
Discover how technology has transformed communication, allowing us to stay visually connected with friends and family worldwide, even from remote vacation spots. This video delves into the advancements from traditional satellite...
Curated Video
CompTIA A+ Certification Core 2 (220-1102) - Malware
Malware comes in many forms; infestations have many symptoms. This video describes malware in all its lovely shades of ugly, from viruses and worms to spontaneous application crashes and invalid certificate errors. This clip is from the...
Curated Video
CompTIA A+ Certification Core 2 (220-1102) - Troubleshooting Internet Connections
The CompTIA A+ exams have many network troubleshooting scenario questions. The author gives you a few rules to help you get through these questions. In addition, a few basic tools and preparation makes troubleshooting most problems easy...
Curated Video
CompTIA A+ Certification Core 2 (220-1102) - Internet of Things (IoT)
Author explores some of the latest and greatest networking technologies with the Internet of Things (IoT). He describes the three common wireless technologies used to connect to IoT devices, 802.11, Zigbee, and Z-wave. The author...
Curated Video
CompTIA A+ Certification Core 2 (220-1102) - Virtual Private Networks (VPNs)
In this video, Author shows how Virtual Private Networks (VPNs) work and why people use VPN connections. He discusses the types of protocols and clients that make this work today and walks through a generic VPN setup. This clip is from...
Curated Video
CompTIA A+ Certification Core 2 (220-1102) - Proxy Servers
In this video, the author describes how proxy servers work to block certain websites and filter outgoing or incoming content. The video shows how to set up a browser to connect to a proxy server. This clip is from the chapter "The...
Curated Video
CompTIA A+ Certification Core 2 (220-1102) - The World Wide Web
The web puts a graphical face on the Internet. You access it via a web browser, connecting with HTTP (insecure) or HTTPS (secure). Certificates give you a resource for whether a website can be trusted. This clip is from the chapter "The...
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CompTIA A+ Certification Core 2 (220-1102) - Telnet and SSH
The Telnet and SSH protocols enable techs to access and control hosts remotely using the command-line interface in Windows. Telnet offers no security. SSH connections are encrypted for better security. This clip is from the chapter "The...
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CompTIA A+ Certification Core 2 (220-1102) - Port Forwarding
NAT is a handy tool but comes with a huge drawback: no servers behind the firewall are accessible to the outside world. Port forwarding allows opening specific ports on your NAT-enabled router to provide access to servers behind it. This...
Curated Video
CompTIA A+ Certification Core 2 (220-1102) - Windows Firewall
Like all operating systems, Windows comes with a built-in software firewall. Unlike the firewall on your router, this firewall only protects a single system. It's important for techs – and the users they support – to understand how to...
Curated Video
CompTIA A+ Certification Core 2 (220-1102) - Firewall Configuration
Setting up a hardware firewall is an obvious first step to making sure your network is protected. Even the most basic router has several different types of firewall settings – without proper configuration, you will either leave your...
Curated Video
CompTIA A+ Certification Core 2 (220-1102) - Basic Router Configuration
All routers share some basic configuration steps every tech must know. From router passwords to LAN IDs, this is the place to learn about these settings. This clip is from the chapter "Local Area Networking" of the series "CompTIA A+...
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CompTIA A+ Certification Core 2 (220-1102) - Routers
The CompTIA A+ exams challenge test takers to perform many configurations of a typical home router. But what does a router do for a SOHO network? This clip is from the chapter "Local Area Networking" of the series "CompTIA A+...
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CompTIA A+ Certification Core 2 (220-1102) - Working with Workgroups
Microsoft developed the concept of Workgroups for small networks to work with their naming system. Workgroups are simple and provide no security, but they're a part of every small Windows network. This clip is from the chapter "Local...
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CompTIA A+ Certification Core 2 (220-1102) - Understanding DNS
Individual hosts use IP addresses, but humans are terrible at memorizing long strings of numbers. To make our lives easier, most TCP/IP networks (and certainly the Internet) use the Domain Name System (DNS) to apply more human-friendly...
Curated Video
CompTIA A+ Certification Core 2 (220-1102) - Working with Connections
When two computers begin the process of sharing data, they create what we call a connection (or session). A good tech knows how to use common utilities to observe these connections and diagnose issues. This clip is from the chapter...
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CompTIA A+ Certification Core 2 (220-1102) - Dynamic IP Addressing
Manually entering IP addresses into all our devices is an administrative nightmare. To avoid this mess, smart techs use the Dynamic Host Configuration Protocol (DHCP) to automatically provide IP addresses to individual hosts. This clip...
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CompTIA A+ Certification Core 2 (220-1102) - Network Address Translation (NAT)
You'd be hard-pressed to find a home or small office router that isn't using Network Address Translation (NAT). NAT provides some amazing benefits but also has some serious limitations. This clip is from the chapter "Local Area...
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CompTIA A+ Certification Core 2 (220-1102) - Special IP Addresses
The designers of IP addresses reserved many IP addresses for special uses. From loopback to private IP addresses, a good tech understands these special addresses as well as when and how to use them. This clip is from the chapter "Local...
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CompTIA A+ Certification Core 2 (220-1102) - Network IDs and Subnet Masks
IP addressing was designed from the ground up for flexibility in supporting LANs and WANs of any size. The first step towards understanding this flexibility is to understand Network IDs and how they interact with a subnet mask to get...
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Behavioral Design Patterns in C++ - Help System - I
In this video, we will use the example of a help system to understand the CoR pattern. It will also give you an overview of the example. This clip is from the chapter "Chain of Responsibility" of the series "Behavioral Design Patterns in...
Curated Video
CompTIA A+ Certification Core 1 (220-1101) - TCP, UDP, and ICMP
TCP is the most popular IP protocol, but it isn't the only one. User Datagram Protocol (UDP) and Internet Control Message Protocol (ICMP) both serve important purposes and features that techs need to understand. This clip is from the...
Healthcare Triage
Misinformation About Health Is Nothing New
Misinformation. A recent and major problem facing us all, and one that is pervasive in many realms including medicine and healthcare, which are, of course, favorite realms around here. But is all this stuff recent? Is misinformation a...