Free CCNA | Network Devices | Day 1 | CCNA 200-301 Complete Course

Chapter 1: Introduction

• Course Overview

  • Welcome to Jeremy's IT Lab's complete CCNA course.

  • Goal: Provide comprehensive materials to help pass the CCNA exam, free of charge.

  • Includes:

    • Lecture videos covering every topic on Cisco’s exam topics list.

    • Practice quizzes for each lecture.

    • Flashcards for review and memory retention.

    • Practical labs using Packet Tracer.

    • Multiple practice exams for final preparation.

  • Additional contextual information to enhance understanding of networks.

Chapter 2: Who is this course for?

• Target Audience

  • Anyone aiming to pass the CCNA 200-301 exam.

  • Course content applicable for anyone interested in computer networking, regardless of exam intention.

  • Basic requirement: Familiarity with computers.

  • Foundational networking knowledge will be provided, requiring no prior networking or programming knowledge.

  • First lesson will focus on network devices, the foundation for future lessons.

Chapter 3: What is a network?

• Defining a Network

  • Wikipedia Definition: A computer network allows nodes to share resources.

  • Nodes: Devices connected in a network.

  • Key network nodes discussed:

    • Router: Routes data between networks.

    • Switch: Connects devices within a network, facilitating communication.

    • Firewall: Protects networks from unauthorized access, can be hardware or software-based.

    • Server: A device providing services to clients.

    • Client: The device requesting services from the server.

  • Clients and servers may also be referred to as end hosts or endpoints.

Chapter 4: Building a network

• Creation of a Network

  • Example of two PCs connected via a cable creating a network.

  • Once connected, nodes can share resources and communicate, validating the definition of a network.

Chapter 5: Clients

• Understanding Clients

  • Devices that access services provided by a server include:

    • Windows-based PCs

    • macOS-based iMacs

    • iPhones running iOS

  • Definition: A client is a device that requests services from a server.

Chapter 6: Servers

• Understanding Servers

  • Servers can vary in appearance and functionality.

  • Defined in relation to clients:

    • Client Definition: A device accessing a service made available by a server.

    • Server Definition: A device that provides functions or services for clients.

  • Example: PCs can act as servers in specific scenarios.

Chapter 7: Servers and Clients

• Client-Server Relationship

  • Example with two PCs:

    • PC1 (client) requests an image from PC2 (server).

  • Another example with a computer accessing a YouTube server via the Internet.

  • In both cases, the client makes a service request, and the server responds.

  • Important note: The same device can fulfill both client and server roles in different scenarios.

Chapter 8: Switches

• Role of Switches

  • Switches connect end hosts within a network and facilitate communication.

Chapter 9: Routers

• Enterprise Networks

  • In an enterprise setting, routers connect different branches (e.g., New York and Tokyo).

  • PCs and servers are not directly connected; they connect through switches to aggregate network connections.

Chapter 10: Firewalls

• Firewalls Explained

  • Example of a Cisco Catalyst switch with multiple interfaces or ports for network connectivity.