Lab 1 - My First Real Network
Published: April 15, 2026
Objective
Build a small network where: 2 PCs can communicate through a switch
Requirements
Devices
- 1 Switch (2960 is fine)
- 2–3 PCs
IP Addressing
Assign static IPs:
| Device | IP Address | Subnet Mask |
|---|---|---|
| PC1 | 192.168.1.10 | 255.255.255.0 |
| PC2 | 192.168.1.20 | 255.255.255.0 |
| PC3 | 192.168.1.30 | 255.255.255.0 |
Tasks
Task 1 – Connect everything
- Use copper straight-through cables
- Plug PCs into the switch
Task 2 – Configure IPs
On each PC:
- Desktop → IP Configuration
- Enter the IPs above
Task 3 – Test connectivity
From PC1:
- ping 192.168.1.20
- ping 192.168.1.30
Knowledge Test
Why are no routers needed here?
No router is needed because all devices are in the same subnet, so they can communicate directly at Layer 2 using a switch.
What does a switch actually do?
A switch forwards frames using MAC addresses. It learns which MAC address is on which port and sends traffic only to the correct destination.
Why do all the devices need to be in the same subnet?
Devices in different subnets require a router to communicate. Without a router, devices can only communicate within their own subnet.
What happens when you ping?
Ping uses ICMP. The source sends an Echo Request, and the destination replies with an Echo Reply to confirm connectivity.