You can Download Ready made project here (BUS TOPOLOGY): 

https://raw.githubusercontent.com/AlbatrossC/sppu-codes/main/answers/cnl/1_bus_topology.pkt


JUST OPEN THIS FILE IN CISCO Packet TRACER AND FAST FORWARD THE TIME.


Manually Doing this:

Step 1: Bring Devices onto the Workspace:
From the Device List (bottom section) of Packet Tracer, drag and drop:
4 PCs → (End Devices → PC)
2 Switches (2960) → (Switches → 2960)
1 Router (1941) → (Routers → 1941)

You should have:
Left side: PC0, PC1 connected to Switch0
Right side: PC2, PC3 connected to Switch1
Router in the middle, connecting both switches


Step 2: Connect All Devices
Use Copper Straight-Through cables for all connections.

| From    | To                          | Port Type       |
| ------- | --------------------------- | --------------- |
| PC0     | Switch0                     | FastEthernet    |
| PC1     | Switch0                     | FastEthernet    |
| PC2     | Switch1                     | FastEthernet    |
| PC3     | Switch1                     | FastEthernet    |
| Switch0 | Router (GigabitEthernet0/0) | GigabitEthernet |
| Switch1 | Router (GigabitEthernet0/1) | GigabitEthernet |


STEP3: Router Configuration
1. Open Router (1941)
   - Go to Config tab

2. Configure Interface G0/0
   - IP Address: 192.168.1.1
   - Subnet Mask: 255.255.255.0
   - Port Status: ON

3. Configure Interface G0/1
   - IP Address: 192.168.2.1
   - Subnet Mask: 255.255.255.0
   - Port Status: ON

4. Save and Verify
   - Close configuration window
   - Both interface lights should be GREEN

Green dots on both interfaces indicate active links 


Step 4: Configure Each PC
Click on each PC → Desktop tab → IP Configuration

| PC  | IP Address   | Subnet Mask   | Default Gateway |
| --- | ------------ | ------------- | --------------- |
| PC0 | 192.168.1.10 | 255.255.255.0 | 192.168.1.1     |
| PC1 | 192.168.1.11 | 255.255.255.0 | 192.168.1.1     |
| PC2 | 192.168.2.10 | 255.255.255.0 | 192.168.2.1     |
| PC3 | 192.168.2.11 | 255.255.255.0 | 192.168.2.1     |

Step 5: Testing. Click the message icon (Add Simple PDU) P
And click on PC to Router , PC to PC , etc