How to Use Cisco Packet Tracer: A Beginner’s Guide

Cisco Packet Tracer is the free network simulator most people meet on their first day of studying networking — and then keep using for years. This is a quick, no-fluff tour: what it is, what it’s for, how to install it, and how to actually build and test a network inside it. There’s a PDF free to grab below, as well as the source files for our big lab you can use.

What’s in this tour

The video is chaptered so you can jump straight to the bit you need. Here’s the running order:

1. What is Packet Tracer?
2. What is it used for?
3. How to download and install it
4. The canvas, menus and devices
5. Connecting devices together
6. Simulation mode — watch the packets move

1. What is Packet Tracer?

Packet Tracer is a network simulator made by Cisco. In plain terms, it’s a piece of software that simulates a room full of networking gear — routers, switches, PCs, servers, cabling, and more — so you can build a whole network on your screen and watch it run without buying a single piece of equipment.

Three things make it worth your time:

• It’s free. There is no paid version. You only need a free account (more on that below).
• It runs on anything. Windows, macOS, and Linux. No special hardware — about 4 GB of RAM and 1.4 GB of disk space.
• It’s a safe sandbox. You can misconfigure something, break the network, then reset and try again. Nothing real goes down while you learn.

2. What is it used for?

The whole point is to learn networking by doing, not just by reading. Day to day, you’ll use it to:

• Build networks — drag routers, switches and PCs onto the canvas and join them with virtual cables.
• Practice real commands — the command line inside Packet Tracer is the same Cisco IOS syntax you’ll type on live equipment.
• Watch traffic flow — switch to Simulation mode and literally see a packet travel hop-by-hop across your network.
• Troubleshoot — break a config on purpose, find the fault, and fix it with zero risk.

It’s a great fit for anyone studying networking — and not just Cisco people. The fundamentals you practice here (IP addressing, subnetting, switching, routing) carry straight over to vendor-neutral exams. It’s solid practice for Cisco CCNA, CompTIA Network+, CompTIA A+, and CompTIA Security+, as well as any course that covers networking fundamentals. Instructors lean on it, too, because it lets them demo complex topologies live without a lab budget.

3. How to download and install it

Packet Tracer is free, but you do need a free Cisco Networking Academy (NetAcad) account to download it. Here’s the path:

1. Create a free account. Sign up at netacad.com. Registration is open to everyone now, including self-learners — you don’t need to be enrolled in a paid class.
2. Enroll in the free course. Join the free “Getting Started with Cisco Packet Tracer” course. That’s what unlocks the download links.
3. Download the right version for your OS. There are installers for Windows 10/11 (64-bit), macOS 12 or later, and Ubuntu 22.04/24.04 LTS.
4. Install and launch. Run the installer, open Packet Tracer, and when prompted, sign in with your NetAcad login. (You can run as a guest, but signing in unlocks full functionality.)

Which version? The current release is Packet Tracer 9.0.0. If you’re studying specifically for CCNA, the older 8.2.2 build is still the recommended version for exam prep — and the two happily install side by side, so you can keep both. Only ever download from the official netacad.com site, never from a torrent or mirror.

4. The canvas, menus, and devices

When Packet Tracer opens, the big empty area in the middle is your workspace (the canvas) — this is where you’ll build your network. A few areas to get familiar with:

• The menu bar (top). File, Edit, Options, View, Tools and so on — the usual save/open/undo lives here, along with zoom controls.
• The device box (bottom-left). This is the important one. The lower-left corner holds your device categories: Network Devices (routers, switches, hubs, wireless, security), End Devices (PCs, laptops, servers, phones, IoT), and Connections (the cables).
• The device list (bottom, next to the categories). Pick a category, and the specific models appear in the box to its right. To place one, just drag it onto the canvas.
• The right-hand toolbar. Select, move, delete, place a note, and use the inspect tool. The envelope icons here are what you’ll use later to send test traffic.
• Realtime / Simulation toggle (bottom-right). By default, you’re in Realtime mode, where the network behaves live. We’ll flip to Simulation mode shortly.

Start simple: drag two PCs and one switch onto the canvas. That’s enough to learn the next two steps.

5. Connecting devices together

Devices do nothing until they’re cabled up. Click the Connections category (the lightning-bolt icon), and you’ll see the cable types:

• Automatically choose connection type (the gold lightning bolt) — great when you’re starting out; Packet Tracer picks the correct cable for you.
• Copper Straight-Through — for connecting unlike devices, e.g., a PC to a switch, or a switch to a router.
• Copper Cross-Over — for connecting like devices, e.g., a switch to a switch, or PC to PC.
• Console (light blue) — for managing a device from a PC’s terminal.
• Plus serial, fiber, and others you’ll meet later.

To make a connection: click the cable type, click the first device and choose a port (for example, FastEthernet0 on a PC), then click the second device and choose a port (for example, GigabitEthernet0/1 on the switch). A cable appears between them.

Watch the little link lights on the cable ends: green triangles mean the link is up, amber means a switch port is still settling (spanning tree), and red means the link is down — usually a wrong cable or a port that’s been shut down.

6. Simulation mode — watch the packets move

This is the feature that makes Packet Tracer click for most people. In Realtime mode, traffic happens instantly, just like a real network. Flip the toggle in the bottom-right to Simulation mode, and time slows right down, so you can watch each packet travel one hop at a time.

Here’s the simplest way to try it:

1. Make sure both PCs have IP addresses on the same network (click a PC → Desktop → IP Configuration).
2. Switch to Simulation mode.
3. Grab the Add Simple PDU tool (the closed-envelope icon on the right toolbar). Click the first PC, then the second PC — that sends a ping between them.
4. Use the Play and Capture / Forward buttons to step the packet through the network. You’ll see the envelope hop from PC, to switch to PC.
5. Click an envelope at any hop to open the PDU Information window and see exactly what’s happening at each OSI layer.

Use the protocol filters to show only what you care about (ICMP for pings, ARP, and so on) so the event list doesn’t get noisy. Being able to see the traffic — and where it stops when something’s wrong — is what textbooks can’t give you.

Where to go next

That’s the whole tool in a nutshell: build it, connect it, run it, break it, fix it. From here, the fastest way to get good is to follow structured, hands-on labs rather than poking around on your own. That’s exactly what we build at 101Labs.net — step-by-step networking labs that take you from “what’s a switch?” to passing your exam.

Download the slides above, fire up Packet Tracer, and build your first network today.