Part 01 of Computer Networking Fundamentals: Overview

Module 1 Part 1: What is Computer?

Module 1 Part 3: ⁣Computer Processing and Storage

Module 4 Part 5: ⁣Advanced Operating System Concepts - Multitasking, Multithreading, and RTOS (Real-time Operating Systems)

Part 03 of C# .net Bootcamp course: ⁣Development Environment Overview

In this lesson , you are going to learn about Development Environment we are going to use, that is The Microsoft Visual Studio or Microsoft Visual Studio Code.

Module 7 Part ⁣3: Communication, Collaboration, and Online Safety

⁣⁣⁣CompTIA IT Fundamentals+ Course | Module 8 Part 1: Implementing Networks

Part 21 of C# .NET Bootcamp: ⁣Casting and Value Type Conversions

In this lesson, you'll learn how to cast and convert value type from a type to another type.

Part 36 of C# .NET Bootcamp: Namespaces in C#

The 1683 Ottoman siege of Vienna is often cited as a critical turning point in European history. Investigate the events leading to the siege and battle, witness the dramatic defense of the city under the Polish king Jan Sobieski, and examine both the legacy of the clash and historical misconceptions surrounding it.

Part 07 of Computer Networking Fundamentals: Additional Network Types

Additional Network Types

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

1. Compare and contrast network types.

Learner Objective: Compare and contrast network types.

Description: In this episode, the learner will explore additional network types such as personal area networks (PAN), metropolitan area networks (MAN), campus area networks (CAN) and storage area networks (SAN).

• Introduction to Network Infrastructure
  • Additional Network Types
    • Personal Area Networks (PAN) - A network that is typically an individual's or user's immediate vicinity. The range is common a meter to 10 meters. Common devices are Wi-Fi and Bluetooth peripherals
    • Metropolitan Area Network (MAN) - A network that spans a larger geographical area than a local area network, but a smaller coverage area than a wide area network. The coverage area is a single city, municipality or in some instances multiple cities.
    • Wireless Metropolitan Area Network (WMAN) - A network in which the scope is the same as a traditional met area network, using unbounded media such as the Wireless Interoperability for Microwave Access or WiMAX.
    • Campus Area Network (CAN) - A network that is very similar to the scope of a metropolitan area network, however is under the control of a single academic body.
    • Wireless Wide Area Networks (WWAN) - A network that is the same in coverage area to a traditional wide area network, using cellular communications such as 3G, 4G, 5G and LTE to communicate.
    • Storage Area Networks (SAN) - a network type that utilizes high-speed connections, using Fiber Channel, interconnected switches, fiber optic media, connecting servers to data storage.

Part 14 of Computer Networking Fundamentals: Network Hardware

Network Hardware

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

1. Compare and contrast common network hardware.

Learner Objective: Compare and contrast common network hardware

Description: In this episode, the learner will be introduced to common network hardware.

• Introduction to Network Infrastructure
  • Network Hardware
    • Network adapters - a component that controls network communications for the device it is connect to or integrated into
    • Repeaters/extenders - a network component that regenerates a signal, then re-transmits the signal to propagate the communications farther.
    • Hubs - an older, largely obsolete network connectivity device that acts as a multi-port repeater. These network components do not make decisions on where to send the traffic and can reduce performance.
    • Switches - a network connectivity device that forwards network communications between a series of ports. These devices rely on direct connections and use MAC addresses to determine where to send traffic.
    • Routers - a network connectivity device that forwards traffic between networks based on IP addresses.
    • Firewalls - a network component that is used to secure and control network traffic based on predetermined criteria.
    • Voice Over IP (VoIP) phones - a network device can digitizes voice communications that can be routed across TCP/IP networks.
    • Access points - a network connectivity device that allows wireless clients access to a wired network.
    • Cable modems - a common network connectivity device used to provide Internet access using coaxial media.
    • Dial-up modems - a network connectivity device that modulates and demodulates a digital signal, sent over analog PSTN (public switched telephone network) lines.

Part 17 of Computer Networking Fundamentals: Network Cable Types and Connectors

Cable Types and Connectors

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

1. Compare and contrast network cabling types, specifications and standards.

Learner Objective: Compare and contrast network cabling types, specifications and standards.

Description: In this episode, the learner will explore various network cable types, connectors and cabling standards.

• Introduction to Network Hardware
  • Network Media Types
    • Cable Types
      • Copper - copper cabling is the most prevalent media in networks today. This type of media has a lower cost when compared to fiber
        • Coaxial cabling - this type of copper media is mostly used in audio and video implementations today rather than networking. This cable type uses a centralized copper conductor wrapped in a dialectric coating, braided shielding and an insulating out jacket. The common connectors used for termination are BNC, F-type and T connectors.
        • Twisted pair cabling - this is the most commonly used bounded network media in local area networks. This cable is comprised of 8 copper conductors, twisted in four pairs. These cable come in an unshielded variety called unshielded twisted pair or UTP as well as a shielded variety that wraps the internal conductors in a foil shielding called shielded twisted pair or STP. These cables use an RJ-45 connection for termination not to be confused with the smaller RJ-11 connector used in telephone systems.
          • PVC grade cable - this twisted pair cabling is commonly used to connect computers to wall plates.
          • Plenum grade cable - this cabling is used in premise wiring throughout plenum spacing for fire code.
      • Fiber Optic - this type of cabling uses glass or plastic cores, cladding, strengthening fibers and an outer jacket. This network media has the fastest and farthest transmission distance of all bounded network media.
        • Multimode fiber - this fiber optic cable uses cores of 50 and 62.5 microns and mulitple light sources to propagate the signal. It is the cheaper and shorter distance when compared to singlemode fiber.
        • Singlemode fiber - this fiber optic cable uses a core of 9 microns and a single light source to propagate the signal. This type of fiber optic cabling is more expensive and farther transmission distances than multimode fiber.
        • Connectors
          • Subscriber Connector - An older square locking connector.
          • Lucent connector - A smaller connector than the SC connector, providing a greater port density.
        • Transceiver Modules
          • SFP/SPF+ - these are modules are identical in size, however SFP support 1 Gbps transmission speeds and SFP+ supports 10Gbps.
          • QSFP/QSFP+ - these modules are identical in size, the difference is that the QSFP support for four 1 Gbps links simultaneously and QSFP+ supports four 10 Gbps links simultaneously.
      • Cable Categories - these are a set of specifications that were developed by the Telecommunication Industry Association/Electronics Industry Alliance or TIA/EIA as a part of the cabling standards endorsed by the American National Standards Institue (ANSI)
        • CAT5e - this is the cable used in Gigabit Ethernet implementations capable of transmitting data a 350 Mbps
        • CAT6 - this is the cable standards used in Gigabit Ethernet implementations capable of transmitting data at 1 Gbps
        • CAT6a - this is the cable used in Gigabit Ethernet implementations capable of transmitting data up to 10 Gbps.
    • Ethernet Base Standards
      • 10BASET = Ethernet implementation, 10 Mbps tranmission speed over twisted pair cables
      • 100BASET = Fast Ethernet implementation, 100 Mbps tranmission speed over twisted pair cables
      • 1000BaseTX = Gigabit Ethernet implementation, 1000 Mbps tranmission speed over twisted pair cables
      • 10GBASELX - 10 Gigabit Ethernet implementation using fiber optic media.
    • Cabling Issues
      • Improper termination - internal conductors are crossed or damaged
      • Electromagnetic interference - high voltage power sources, water fountains, HVAC systems, fluorescent lighting can cause interference and corrupt the communication signal in copper-based media.
      • Damage - physical damage to the out jacket, internal conductors or cores can cause communication issues on the network
      • Standards Mismatch - this can cause slower than expected or poor performance on the network or worse, no communications.

CompTIA IT Fundamentals+ Course | Module 4 Part 4: Laptops

Part 23 of C# .NET Bootcamp: String Parsing

In this lesson, you will learn about how to parse string inputs.

Part 55 of C# .NET Bootcamp: ArrayList

Part 03 of Computer Networking Fundamentals: Virtual Local Area Networks (VLANs)

Virtual Local Area Networks

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

1. Identify the characteristics and importance of VLANs.

Learner Objective: Identify the characteristics and importance of VLANs

Description: In this episode, the learner will be introduced to Virtual Local Area Networks or VLANs as well as identify the purpose of implementing them in networks.

• Introduction to Network Infrastructure
  • What are VLANs? - A logical division of networked devices connected within a local area networked
  • Why are VLANs important? - VLANs allow administrators to divide ports on a switch into logical groupings. This creates multiple logical switches out of a single physical switch. This can be done for performance and security.
  • Understanding communication types
    • Broadcast - A communication message that is sent by a single device to every other device connected to the switch.
      • One to all communication
    • Unicast - A communication message that is sent by a single device to another device on the network.
      • One to one communication
    • Multicast - A communication message that is sent by a single device to a group or subset of the devices on the network.
    • Broadcast domain - A group of devices connected to a network that receive broadcast communications. This grouping can be based on physical or logical segments.
    • Segments - A divison that splits a network into smaller parts.
  • Performance benefits - VLANs create virtual boundaries that reduce the amount of broadcast traffic between devices on a larger network and ease administration.
  • Security benefits - VLANs allow network administrators to group devices together to assign an enforce security policies. Devices within a VLAN can only communicate with other devices assigned to the same VLAN.
  • How are VLANs implemented?
    • VLANs require configuration of managed switches.
    • VLANs use tagging information that is inspected by the switch to determine which VLAN the communication belongs to.

⁣⁣⁣CompTIA IT Fundamentals+ Course | Module 7 Part 6: Network Addressing

Module 6 Part ⁣2: Phishing, Network Security, and Firewalls

Module 3 Part 5: ⁣Software Testing and Emerging Trends