CompTIA IT Fundamentals+ Course | Module 1 Part 1: Introduction to CompTIA IT Fundamentals+

Part 20 of the C# .NET Bootcamp: ⁣Using C# Value Types

CompTIA IT Fundamentals+ Course | Module 3 Part 4: ⁣Digital Products

CompTIA IT Fundamentals+ Course | Module 5 Part 3: ⁣Central Processing Unit (CPU)

Part 19 of C# .NET Bootcamp: ⁣C# .NET Value Types

Part 12 of Computer Networking Fundamentals: Wireless Network Configuration

Wireless Network Configuration

At the end of this episode, I will be able to:

1. Examine and implement a wireless network configuration.

Learner Objective: Examine and implement a wireless network configuration.

Description: In this episode, the learner will explore a demonstration of wireless network concepts through practical application of wireless network configuration.

• Introduction to Network Infrastructure
  • Wireless network demo
  • Components
    • Wireless enabled laptop
    • Ethernet cable (to connect to the access point)
    • TP-Link TL-WA1201 AC1200 Wireless Access Point
  • If necessary, perform factory reset on the AP
  • Follow the procedures found on the vendor website
    • https://www.tp-link.com/us/support/download/tl-wa1201/
  • Login to the AC point
  • View the Status page
    • Note - examine any current connections via the "Wired Clients" and "Wireless Client"* icons
  • Click the "Quick Setup" tab
    • Note* - Examine the options
      • Access Point mode - the AP controls all communications on the network
      • Range Extender mode - Relays signals to increase the transmission distance of the wireless network
      • Client mode - acts as a networks adapter (or wireless client), allows other wired devices connect to the AP
      • Multi-SSID mode - allows the Access point to create multiple wireless networks for VLANs and security.
  • Click the Network blade
    • LAN - customize the IP address scheme for the AP and the LAN.
    • DHCP Server - customize the DHCP server settings for the wireless network.
  • Click the Wireless blade
    • Wireless Settings - configure the SSID, encryption, mode, channel width and channel.
    • Portal - creates a captive portal to direct clients to for authentication purposes
    • WPS - enable or disable WPS
    • Statistics - view the client's connection properties
    • MAC Filtering - allow or deny access to the wireless networks based on the wireless client's MAC address
  • Click the System Tools blade
    • Time Settings, LED Control, SNMP, Ping Watchdog, Firmware upgrades, Backup & Restore, Reboot Schedule, Administration and Diagnostics

Module 6 Part 5: ⁣Security Best Practices, Compliance, and Emerging Threats

Module 7 Part ⁣4: Productivity, Backup, and Troubleshooting

CompTIA IT Fundamentals+ Course | Module 4 Part 2: ⁣Overview of a Computer

CompTIA IT Fundamentals+ Course | Module 3 Part 7: Data-driven Business Decisions

CompTIA IT Fundamentals+ Course | Module 1 Part 2: Exam Tips

Module 5 Part ⁣5: Network Security Tools and Future Trends

Part 26 of C# .NET Bootcamp: Conditionals

In this lesson you will learn about using conditionals branching in C#

CompTIA IT Fundamentals+ Course | Module 5 Part 2: ⁣Motherboard

Module 8 Part ⁣4: Cybersecurity, Ethics, and Real-World Applications

Part 01 of ⁣C# .NET Bootcamp: The Fundamentals (OOP, LINQ, Test Automation + more)

Module 7 Part ⁣1: Introduction to Digital Literacy and Essential Tools

Part 0⁣5 of Computer Networking Fundamentals: Demarcs and Perimeter Networks

Demarcation and Perimeter Networks

At the end of this episode, I will be able to:

1. Describe the characteristics and importance of demarcation points and perimeter networks.

Learner Objective: Describe the characteristics and importance of demarcation points and perimeter networks.

Description: In this episode, the learner will explore what demarcation points and perimeter networks are as well as what the importance of these technologies are in networking.

• Introduction to Network Infrastructure
  • Demarcation point - The physical point that a carrier's network connection ends and a private network starts (think network boundaries). The term demarcation is often abbreviated demarc.
    • Types of demarcation points
      • Residential - These are utilized in homes, either at the first socket (typically the kitchen) or a junction box on the exterior of the house
      • Business - These demarcation points are either installed on the exterior of the building, or the carrier will install a specialized device within the interior of the building at a main distribution frame (think server closet/datacenter)
    • Demarcation wiring runs either overhead or underground
    • A demarc is important to understand in networks today as this marks the point of responsibility for networked components and service. The carrier's network up to the demarc is the responsibility of the carrier, however the demarc point that connect on the residential or business side is the responsibility of the subscriber.
    • Demarc connections can be fiber, coaxial or PSTN lines
  • Perimeter Network (Screened Subnets) - A logical boundary between a privately owned network and the Internet. There are other names for perimeter networks such as demilitarized zone (DMZ), screened subnet and edge network.
    • Purpose
      • Security - A companies internal network must remain secure and not allow public access. Most organizations will install security devices in the perimeter network to control the flow of inbound and outbound traffic such as firewalls, intrusion detection systems (IDSs), intrusion prevention systems, honeypots or devices called unified threat management systems (UTM) which combine all the previous devices' functionality into one centralized device.

Part 10 of Computer Networking Fundamentals: Wireless Radio Frequencies

Wireless Radio Frequencies

At the end of this episode, I will be able to:

1. Compare and contrast wireless frequencies used in wireless local area networks.

Learner Objective: Compare and contrast wireless frequencies used in wireless local area networks

Description: In this episode, the learner will identify the two frequency ranges used in wireless local area networks (WLAN).

• Introduction to Network Infrastructure
  • Wireless Frequencies
    • Industrial, Scientific and Medical (ISM) band
      • 2.4 Ghz
        • Channels
          • 13 channels (11 available in the US)
          • Each channel is 5 Mhz apart
          • 22 MHz spacing is required between channels to reduce interference
          • 3 non-overlapping channels (22 MHz spacing)
            • Channel 1, channel 2, channel 3
          • 802.11n allows for channel bonding
            • 20 MHz and 40 Mhz
    • Unlicensed Nation Information Infrastructure (U-NII) band
      • 5 Ghz
        • Channels
          • 25 channels
          • All channels are 20 Mhz wide and non-overlapping (unless bonded)
        • The 5 GHz range allows for channel bonding
          • 20 MHz, 40 MHz, 80 MHz and 160 MHz

Part 04 of Computer Networking Fundamentals: ⁣Wired Local Area Networks vs. Wireless Local Area Networks

Wired LANs vs Wireless LANs

At the end of this episode, I will be able to:

1. Compare and contrast wired and wireless LAN implementations.

Learner Objective: Identify the characteristics and importance of VLANs

Description: In this episode, the learner will be introduced to the basic constructs and characteristics of wired and wireless local area networks.

• Introduction to Network Infrastructure
  • Wired LAN
    • Devices in this type of LAN are connected using bounded media
    • Bounded media types
      • Copper - The most prevalent LAN-based network medium used today. This medium uses single or multiple copper conductors to transmited data.
      • Fiber - These medium uses an optical light source to transmit data through a concentrated core made of either plastic or glass.
    • For devices to communicate, they need to be physically connected via Ethernet switch
    • Due to the nature of the physical connections, wired networks can provide a higher level of security than wireless networks
    • Wired LANs can have constraints
      • Limitation of cabling (distance, electromagnetic interference, damage)
      • Building requirements (historical sites, cumbersome installations, proximity to the connectivity device)
      • Mobility is challenging
  • Wireless LAN
    • Devices in this type of LAN connect to the network via radiated energy
    • Wireless LAN Types
      • Infrastructure mode - In this type of Wireless LAN, a centralized network device called a wireless access point controls all communications on the network.
      • Ad-hoc mode - In this type of Wireless LAN there is no centralized connectivity device. The wireless devices communicate directly with each other.
    • Wireless LANs have become increasingly more popular due today because:
      • Ease of installation
      • Reduction of physical cabling
      • Mobility
      • Simplicity to add devices to network
    • Disadvantages
      • Communication eminations
      • Obstacles and interference
      • Network saturation and congestion
  • Hybrid LAN
    • Most common LAN deployment in modern networks today
    • This type of LAN combines both wired and wireless communication
    • Wired LAN
      • Workstations and servers (these are stationary devices)
    • Wireless LAN
      • Laptops, tablets, smartphones (these are devices that require mobility)
      • Any stationary device that requires a connection, but cabling is not feasible or possible