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JuniorNetworkTech165/README.md

Lab 1: Basic 2-PC LAN.

Tools used.

  • Cisco Packet Tracer

Network topology.

Lab 1 topology

IP Configuration.

  • PC0: 192.168.1.10/24
  • PC1: 192.168.1.11/24

Status.

  • Switch connection active.
  • Ping verified between PC0 and PC1.

Lab 2: Basic 4-PC LAN.

Overview.

This lab demonstrates a basic Local Area Network (LAN) layout connecting four Virtual PC Simulators (VPCS) to a single Ethernet switch using GNS3.

Tools used.

  • GNS3 (Graphical Network Simulator-3)
  • VPCS (Virtual PC Simulator)
  • Generic Ethernet switch.

Network topology.

4-PC LAN Topology

IP Addressing Table.

Device Interface IP Address Subnet Mask
PC1 ethernet0 192.168.10.10 255.255.255.0
PC2 ethernet0 192.168.10.11 255.255.255.0
PC3 ethernet0 192.168.10.12 255.255.255.0
PC4 ethernet0 192.168.10.13 255.255.255.0

Verification and Status.

  • Network topology created in GNS3.
  • All devices powered on.
  • IP configuration applied on all VPCS nodes.
  • Full connectivity verified via ICMP ping tests across all devices.

3rd Lab: Troubleshoot incorrect IP addressing.

This lab demonstrate how to identify, troubleshoot, and fix IP addressing misconfiguration in a Local Area Network (LAN).

Tools & Environment.

  • Emulation Software: GNS3
  • Device: 3x VPCS, 1x Ethernet switch

The table below shows the initial network configuration, which were recorded during the lab setup.

1. Initial Addressing table.

Device Interface IP Address Subnet Mask
PC1 ethernet0 192.168.20.10 255.255.255.0
PC2 ethernet0 192.168.20.11 255.255.255.0
PC3 ethernet0 192.168.30.12 255.255.255.0

Network topology.

Network Topology

2. Problem Statement.

  • PC1 and PC2 are configured on the same 192.168.20.0/24 network.

  • PC3 was deliberately misconfigured on the 192.168.30.0/24 network.

  • Result: Ping requests sent from PC1 or PC2 to PC3 failed, because PC3 did not belong to the same 192.168.20.0/24 network.

3. Troubleshooting & Solutions.

  1. Diagnosis: I tried to ping PC3 (192.168.30.12) from PC1 and PC2, but the connection timed out, because PC3 did not belong to the same 192.168.20.0/24 network.

  2. Fix: I corrected PC3's IP configuration, so that it can belong to the same 192.168.20.0/24 network as PC1 and PC2.

Corrected Addressing Table.

Device Interface IP Address Subnet Mask Status
PC1 ethernet0 192.168.20.10 255.255.255.0 Active
PC2 ethernet0 192.168.20.11 255.255.255.0 Active
PC3 ethernet0 192.168.20.12 255.255.255.0 Fixed

4. Testing and verification.

  • I ran the command ping 192.168.20.12 from both PC1 and PC2.
  • Results: The ping test was successful! All ping packets were received with zero packet loss, confirming that all computers can talk to each other.

Lab 4: Custom 5-PC LAN.

Overview.

This lab project demonstrates a 5-PC Local Area Network (LAN) consisting of five end-user computers connected to a single central switch.

Tools and components used.

  • Cisco Packet Tracer (Network Simulation Software)
  • 5 x PCs.
  • 1 x Switch.
  • 5 x Ethernet Copper Straight-Through Cables.

Network topology.

Network-topology

IP Address Table.

Host Interface IP Address Subnet Mask Staus
PC0 Fa0 192.168.0.1 255.255.255.0 Active
PC1 Fa0 192.168.0.2 255.255.255.0 Active
PC2 Fa0 192.168.0.3 255.255.255.0 Active
PC3 Fa0 192.168.0.4 255.255.255.0 Active
PC4 Fa0 192.168.0.5 255.255.255.0 Active

Status and Verification.

  • I successfully configured the IP Address and subnet mask on all the PCs correctly.
  • I used the ping command utility, to test connectivity between all the PCs.
  • Results: The ping test results were successful, proving good network connectivity between the PCs.

Pinned Loading

  1. Basic-2-PC-LAN Basic-2-PC-LAN Public

    Basic 2-PC LAN topology created in Cisco Packet Tracer. Features static IP assignment and ICMP connectivity validation.

  2. Basic-4-PC-LAN Basic-4-PC-LAN Public

    Virtual 4-PC Ethernet LAN topology created in GNS3 using VPCS nodes. Includes full IP addressing scheme and multi-node ping verification.

  3. Troubleshoot-incorrect-IP-addressing Troubleshoot-incorrect-IP-addressing Public

    A GNS3 lab demonstrating how to troubleshoot and fix subnet misconfiguration in a LAN.

  4. Custom-5-PC-LAN Custom-5-PC-LAN Public

    A fundamental Local Area Network (LAN) lab created in Cisco Packet Tracer. This project demonstrates a single-switch star topology connecting five end-user PCs configured on the 192.168.0.0/24 subn…