Jeremy's IT Lab - CCNA 200-301 Network Traffic Lab

Introduction

• Free complete course for CCNA 200-301
• Encouragement to subscribe, like, comment, and share videos

Lab Overview

• Objective: Examine network traffic using Packet Tracer's 'simulation mode'
• Network Diagram Components:
  • Routers: R1, R2
  • Switches: SW1, SW2
  • Server & PC: SRV1, PC1

Network Interfaces

• Interface Labels:
  • G0/0, G0/1, G0/2, F0/1
  • G (Gigabit Ethernet) - 1 Gbps
  • F (Fast Ethernet) - 100 Mbps
• Network Addresses:
  • 192.168.1.0/24
  • 10.0.0.0/24

Subnet and Network Details

• 192.168.1.0/24 Network:
  • Includes SRV1, PC1, SW1, SW2, R1's G0/0 interface
  • IP Address Examples: SRV1 - 192.168.1.100, R1 - 192.168.1.1
• 10.0.0.0/24 Network:
  • R1's G0/1 interface, R2's G0/0 interface
  • IP Address Examples: R1 - 10.0.0.1, R2 - 10.0.0.2

Packet Tracer Simulation Mode

• Activation: Bottom right of Packet Tracer
• Network Traffic: Shows data sent by devices
• Example 1: SW2 sending STP (Spanning-Tree Protocol) data
  • Layer Details:
    • Layer 2: IEEE 802.3 header (Ethernet)
    • Layer 1: Physical ports/interfaces

Network Traffic Analysis

• Example 2: OSPF on R1

  • Protocol: Layer 3 (Used for discovering best network paths)
  • Layer Details:
    • Layer 3: IP Addresses (source & destination)

• Example 3: DHCP on PC1

  • Protocol: Layer 7 (Used to automatically receive IP address)
  • Commands Used:
    • ipconfig /release to release IP
    • ipconfig /renew to renew IP
  • Layer Details:
    • Application Layer includes combined layers 5, 6, 7 (due to TCP/IP model)
    • Layer 4: Encapsulation into UDP segment
    • Layers 3, 2, 1 information present

Conclusion

• Demonstration of OSI and TCP/IP models
• Encouragement to subscribe, like, comment, and share
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Note: This lab helps illustrate the operation of network protocols across OSI and TCP/IP layers, foundational knowledge for CCNA certification.