RJ

Recording-2025-02-21T20:17:07.993Z

Importance of Networking Devices

  • Example of devices:

    • Raspberry Pi can connect with an iPhone.

    • These devices can share files, photos, and email.

Historical Background

  • Difficulty in communication between devices made by different companies.

  • The need for networking models:

    • TCP/IP Model

    • OSI Model

  • Concept began in the 1960s when computers could not share information.

  • 1969: Creation of ARPANET by the US Department of Defense (DOD).

Prototypes and Changes in Networking

  • Initial proprietary networks (e.g., IBM) did not allow communication with other companies' devices.

  • The evolution of networking led to the need for open standards to improve communication.

Networking Models

  • TCP/IP Model: Widely adopted, consists of layers defining communication standards.

  • OSI Model: Seven-layer model that is still referenced:

    • Physical Layer: Involves hardware (e.g., Ethernet cables).

    • Data Link Layer: Uses MAC addresses.

    • Network Layer: Handles IP addresses.

    • Transport Layer: Includes TCP and UDP protocols.

    • Application Layer: The layer where software applications communicate.

Comparison of TCP/IP and OSI Models

  • Both models help in understanding how devices communicate.

  • OSI has two additional layers (Session and Presentation layers).

  • TCP/IP is more practical for modern networking, while OSI is often used for reference.

Practical Applications

  • Understanding layers helps diagnose network issues.

  • Knowing both models is essential for networking certifications (e.g., CCNA).

  • Mnemonic devices can help remember the layers of the OSI model.

    • Example: "All People Seem To Need Data Processing."

Quiz Question Example

  • Quiz questions can relate to networking devices or layers in TCP/IP and OSI models.