When preparing for Cisco certifications such as CCNA, CCNP, or CCIE, choosing the right network simulator or emulator is critical. It can be the difference between passing or failing, mastering core concepts or simply memorizing commands. Despite the title of this series, we will discuss both simulators and emulators to provide a well-rounded comparison. Testing each option individually is not practical for most, especially under time constraints. As a result, candidates often rely on peer recommendations—whether from colleagues, mentors, or online communities.
Often, personal bias influences these recommendations. A GNS3 user might claim it’s superior to Cisco Modeling Labs (CML), while a Packet Tracer advocate might swear it’s the best tool for CCNA prep. Simulators and emulators each have dedicated followers, making it harder to determine the right tool for your needs.
Every software has unique advantages and disadvantages. Rather than declaring a winner, our goal is to help you understand what each one offers so you can make the best choice for your certification goals. We’ll examine two simulators and three emulators, commonly used for Cisco routing and switching certifications:
- Cisco Packet Tracer
- Boson NetSim
- GNS3
- Cisco Modeling Labs Personal (CML-P, formerly VIRL)
- EVE-NG
Let’s start with the simulator category.
What Are Network Simulators?
Defining Network Simulators
A network simulator is a software tool that simulates network devices and topologies. These devices are not real; instead, they mimic the behavior of actual network devices to the best of their programming. Unlike emulators, which use actual operating systems and configurations, simulators rely on coded representations.
Because of this design, simulators can’t handle live traffic. Their capabilities are restricted to the features and commands built into the simulation engine. Advanced functionalities such as DMVPN or Policy-Based Routing are often absent. Despite this limitation, simulators are ideal for foundational training due to their simplicity and low resource consumption.
Simulators are lightweight and can run on most modern computers without needing high-end specifications. This makes them ideal for learners who don’t have access to powerful hardware but still want hands-on practice.
Cisco Packet Tracer Overview
What is Cisco Packet Tracer?
Cisco Packet Tracer is a visual simulation tool created by Cisco for simulating network environments. Originally developed for Cisco’s Networking Academy (NetAcad), it has evolved into a widely used tool for aspiring network professionals.
This article focuses on version 8.2.1.118 and above. It’s available in a 64-bit edition and can be downloaded for free after creating a NetAcad account.
Advantages of Packet Tracer
Cost-Free Access
Packet Tracer is entirely free. The only requirement is to log in with a Cisco NetAcad account, which itself is free. This accessibility makes it perfect for students and professionals at all levels.
Compatibility Across Platforms
Packet Tracer is compatible with Windows (Windows 7, 8.1, 10), macOS (High Sierra, Mojave), and Ubuntu (14.04 LTS). Users across multiple OS environments can take advantage of this compatibility.
Diverse Device Support
Packet Tracer includes a wide range of devices that help create complex topologies. Commonly used devices include:
- Routers: ISR 4321, 1941, 2901, 2911
- Switches: 2960, 3560, 3650
- ASA Firewalls: 5505, 5506
- Meraki Security Appliance: MX65W
- Wireless Controllers and Access Points
This variety allows users to simulate enterprise-level networks as well as small home-office environments.
Versatile Connection Options
Users can connect devices using a wide array of cable types, including:
- Straight-through and crossover copper cables
- Fiber-optic cables
- DCE and DTE serial cables
- Console cables
This allows for hands-on experience configuring both LAN and WAN environments.
Realistic Lab Experience
Packet Tracer allows users to simulate realistic configuration scenarios. For example, users can connect a PC to a router using a console cable, configure the device, and then implement remote management via SSH or Telnet.
Simulation Mode for Troubleshooting
Packet Tracer offers a Simulation Mode alongside its default Realtime Mode. In Simulation Mode, users can observe the step-by-step journey of a packet through the network. This visualization is invaluable when troubleshooting complex issues or understanding protocol behavior.
CLI Accuracy
The command-line interface in Packet Tracer is very similar to real Cisco devices. It even supports several keyboard shortcuts that mimic those found in actual Cisco terminals:
- Ctrl+W: Delete the previous word
- Ctrl+U: Delete the entire line to the left
- Ctrl+C/Z: Cancel input and return to EXEC mode
- Ctrl+A/E: Move cursor to beginning or end
- Ctrl+F/B: Move cursor forward or backward
- Ctrl+P/N: Scroll through command history
Mastering these shortcuts in Packet Tracer helps users transition seamlessly to real-world equipment.
Custom Exercise Creation
Packet Tracer includes an Activity Wizard, which lets instructors and students create interactive labs. These labs can include HTML instructions, randomized variables, and automated grading systems. The Answer Network feature enables automated checks against a predefined set of configurations.
This flexibility makes Packet Tracer more than just a simulator—it becomes an educational toolkit.
Limitations of Packet Tracer
Distribution Challenges for Custom Labs
One of the biggest drawbacks is the lack of a centralized platform for sharing custom lab exercises. Distributing updates or corrections requires manually sending out new versions of the exercise file, which can be cumbersome and prone to error.
A centralized lab repository or in-app marketplace (similar to what exam NetSim offers) could significantly improve user experience.
Software Bugs
Packet Tracer users frequently encounter bugs. These might involve devices not behaving as expected despite correct configuration. The typical solution involves saving and reloading the simulation.
While this workaround is usually effective, it can waste valuable time. Worse, it may lead to bad habits like restarting as a primary troubleshooting method, which can be risky in production environments.
Limited Feature Set
Since Packet Tracer is a simulator, it lacks support for many advanced Cisco features. Users preparing for high-level exams like CCNP or CCIE may find it insufficient for studying certain topics. The lack of real IOS images restricts its utility to foundational and intermediate concepts.
Cisco Packet Tracer remains one of the most accessible and versatile tools for beginners preparing for Cisco certifications. Its ease of use, extensive device library, and educational features make it ideal for CCNA candidates. However, for advanced learners, limitations in feature support and realism may necessitate transitioning to emulators like GNS3 or CML-P.
Boson NetSim: A Premium Cisco Network Simulator
When preparing for Cisco certification exams such as CCNA, CCNP, or CCIE, Boson NetSim is often mentioned among the top-tier network simulators. While Cisco Packet Tracer caters to beginners and is freely available, Boson NetSim targets a more advanced and professional audience. Its key strengths lie in its structured lab environments, strong grading engine, and real IOS command support (simulated).
What is Boson NetSim?
Boson NetSim is a commercial network simulation tool developed by Boson Software. It allows IT professionals to simulate Cisco networking devices without needing physical hardware. This makes it ideal for preparing for certification exams or practicing real-world network scenarios.
The software is tightly integrated with exam (formerly CBT Nuggets), which allows users to access certification-aligned practice labs. Boson NetSim’s target audience includes not just CCNA candidates but also intermediate and advanced learners working toward CCNP and even some parts of the CCIE tracks.
Key Features of Boson NetSim
Rich Lab Environment
Boson NetSim’s biggest draw is its extensive library of prebuilt labs that are tailored to Cisco’s certification tracks. These labs are not just informal scenarios but are structured learning experiences that walk users through configuration, verification, and troubleshooting tasks.
Each lab includes:
- Detailed objectives
- Step-by-step instructions
- Built-in assessment engine
- Hints and solutions
- Packet-level simulation
Realistic Command Line Interface
The CLI in Boson NetSim emulates Cisco IOS very closely. While it doesn’t use actual Cisco IOS images like GNS3 or CML, it replicates most core commands with high fidelity. This means you can practice commands such as show ip route, configure terminal, interface, router ospf, and many others, exactly as you would on real Cisco hardware.
Built-In Grading System
Each lab includes a built-in grading feature that checks your configuration against expected outcomes. This automated feedback helps reinforce correct command usage and configuration logic, a key differentiator from other simulators that require manual self-verification.
Detailed Explanations and Theory
Labs often include background information, describing why certain configurations are necessary or best practices. This helps reinforce networking theory alongside practical skills, which is essential when prepping for Cisco’s scenario-based exam questions.
Pros of Boson NetSim
Certification-Aligned Labs
Every lab in NetSim is aligned to the current exam objectives for Cisco certifications. The software is updated regularly, so it stays current with the latest versions of CCNA and CCNP syllabi. This tight alignment ensures you are practicing only what’s relevant to the exams.
Deep Feedback and Guidance
NetSim provides real-time feedback, including grading of lab activities and suggestions for improvement. If you make a mistake in configuration, the software offers hints to steer you in the right direction. You also receive an explanation of correct answers when labs are complete.
No Need for Cisco IOS Images
Unlike emulators like GNS3 or CML, NetSim doesn’t require downloading or managing Cisco IOS images, which can be legally complicated. This makes it easier to install and get started with, especially for users who aren’t ready to navigate Cisco licensing.
Ease of Use
The UI is polished and intuitive. Creating topologies, selecting devices, and launching labs is a streamlined experience. Even advanced topics like EIGRP redistribution or BGP configuration are presented in a guided, manageable way.
exam Integration
Boson NetSim integrates smoothly with exam, offering synchronized training modules and labs. You can use exam’ video content to learn concepts and then jump into NetSim to practice. This creates a cohesive study flow that helps reinforce learning through repetition and application.
Cons of Boson NetSim
Paid Software
NetSim is not free, and while it’s worth the investment for many, the cost may be a barrier for beginners or casual learners. Prices vary depending on the certification track, with CCNA packages being cheaper than more advanced tracks like CCNP.
Limited Customization
Unlike GNS3 or EVE-NG, you cannot create highly customized or large-scale topologies. While NetSim does support user-created labs, the freedom is limited compared to emulators that allow full control over IOS versions, hardware specs, and device quantity.
Limited to Cisco
NetSim is designed exclusively for Cisco certifications. If you’re looking to practice on Juniper, Palo Alto, or multi-vendor networks, you’ll need to explore other emulators or simulators. It’s a focused tool, not a general-purpose platform.
No Real Traffic Flow
Boson NetSim simulates network behavior rather than emulates real traffic flow. For example, you can’t generate actual packet captures or analyze real-time traffic with Wireshark. While the logical outcomes are accurate, the traffic doesn’t physically move across simulated interfaces.
No Inter-VLAN Routing with Realistic Hosts
Although you can simulate concepts like VLANs and routing, the endpoints (PCs and servers) are limited in behavior. You won’t be able to see ARP requests or ICMP ping messages the same way as in CML or GNS3 with real virtual machines or containers.
Target Audience for Boson NetSim
NetSim is ideal for:
- Students preparing for CCNA, CCNP ENCOR, and other Cisco exams
- Professionals looking for structured practice scenarios
- Self-paced learners who benefit from guided labs
- Anyone who wants a hands-on experience without worrying about licensing or hardware
It’s not ideal for:
- Advanced network engineers who want to emulate complex multi-vendor topologies
- Learners looking to simulate real traffic with tools like Wireshark or tcpdump
- Users who prefer completely open-source or free solutions
Boson NetSim vs. Cisco Packet Tracer
While Packet Tracer is a great free tool for entry-level learners, Boson NetSim excels for learners who need a structured approach with a real grading engine. Packet Tracer is more flexible and open-ended but lacks the depth of feedback and formal instruction.
NetSim’s labs are more comprehensive, especially for CCNP and above. It fills the gap between beginner-friendly simulators like Packet Tracer and advanced emulators like GNS3 or EVE-NG.
Cost and Licensing
NetSim is licensed per user and track. You can purchase access for CCNA, CCNP ENCOR, and other exam-specific packages. Updates for minor versions are usually free, but major upgrades may require additional purchase.
It’s often bundled with practice exams and other resources through exam, which can add even more value to the investment.
Verdict on Boson NetSim
Boson NetSim is one of the most robust network simulators available for Cisco exam preparation. With realistic command-line support, a comprehensive lab library, and seamless exam integration, it offers everything a student needs for hands-on learning.
It’s especially useful for those who want guided practice, formal assessment, and feedback—all within a legal and straightforward setup. While it lacks the full flexibility of real emulators, it more than makes up for it with structure and precision.
GNS3: The Power of Real Network Emulation
When preparing for Cisco exams such as CCNA, CCNP, and even CCIE, GNS3 stands out as one of the most powerful tools for building real-world, complex network topologies. Unlike simulators that mimic network behavior with pre-programmed logic, GNS3 is an emulator—it runs real operating system images on virtual machines to replicate actual Cisco hardware.
GNS3 is trusted by network engineers around the world for both certification training and lab testing before production deployment. If you’re looking for a robust, customizable, and feature-rich emulation platform, GNS3 might be your go-to.
What Is GNS3?
GNS3 is an open-source network emulator that enables users to create highly complex topologies using real Cisco IOS, Juniper JunOS, and other network operating systems. It allows you to run actual device images inside virtual machines, giving you the most accurate representation of network behavior without physical hardware.
Unlike traditional simulators such as Packet Tracer or Boson NetSim, GNS3 doesn’t simulate device behavior. Instead, it emulates the software environment that devices operate in, producing more realistic results—albeit with greater resource requirements.
Key Features of GNS3
Real Cisco IOS Emulation
The main strength of GNS3 is its ability to use real Cisco IOS images. These can be loaded via Dynamips, IOU (IOS on Unix), or through virtual appliances in VirtualBox or VMware. This gives you an authentic labbing experience with full support for routing protocols, interface configurations, and advanced services.
Multi-Vendor Support
GNS3 is not limited to Cisco. You can emulate Palo Alto firewalls, Juniper routers, Arista switches, Fortinet appliances, and Linux hosts. This makes it an excellent choice for engineers working in mixed vendor environments or pursuing multi-vendor certifications.
Integration with Wireshark
You can capture packets on any link in a GNS3 topology using Wireshark. This is invaluable when learning protocols like OSPF, BGP, EIGRP, or even for understanding TCP/IP behavior at a granular level. It’s an advanced feature not available in simpler simulators.
Scalable Topologies
There is virtually no limit to the complexity of topologies you can build with GNS3, aside from your hardware limitations. Whether you’re testing a data center architecture or a hybrid cloud setup, GNS3 can handle it, especially when deployed on a dedicated GNS3 VM or a remote server.
Community-Contributed Appliances
GNS3 supports importing prebuilt appliances from the GNS3 Marketplace. These appliances come with configuration templates, startup scripts, and are ready to use with minimal setup. Examples include Cisco IOSv, Cisco ASAv, Palo Alto VM, pfSense, and Docker containers.
Support for Docker and Virtual Machines
GNS3 integrates with Docker containers and VMs running in VMware Workstation, Fusion, or ESXi. You can use this to simulate end-hosts, run automation scripts, or add Linux-based services like DHCP, DNS, and more to your topology.
Pros of GNS3
Realistic and Flexible
Because it runs real images, GNS3 provides the most authentic configuration experience short of using actual Cisco hardware. Every command, every protocol, and every feature behaves just as it would in production, assuming the image supports it.
Highly Customizable
GNS3 allows full control over devices, images, topologies, links, and more. You can create complex scenarios such as MPLS VPNs, BGP peering with route reflectors, and Layer 2 WAN backhauls—useful for CCNP and CCIE labbing.
Excellent for Advanced Learning
GNS3 is ideal for advanced learners and professionals preparing for CCNP or CCIE. It’s also a strong choice for engineers studying network automation, security, or infrastructure testing.
Free and Open Source
GNS3 is completely free and open-source. You can download it, install it, and start using it right away. This makes it accessible to students and professionals alike, though the cost of obtaining legal Cisco IOS images is still a factor to consider.
Cons of GNS3
Requires IOS Images
GNS3 does not include Cisco IOS images. You must provide your own legally obtained images. This can be a barrier for beginners or those not enrolled in programs that provide access to Cisco software.
High Resource Consumption
Running multiple routers and switches using real images requires significant CPU and RAM. For complex topologies, a powerful machine or a dedicated GNS3 VM/server is recommended. Laptops with limited resources may struggle with larger labs.
Steep Learning Curve
GNS3 has a more technical setup compared to Packet Tracer or NetSim. Installing and configuring GNS3, its VM, and virtual images can be time-consuming. This may deter users who just want a simple lab environment to get started quickly.
No Grading or Built-In Labs
Unlike Boson NetSim, GNS3 doesn’t offer guided labs, instructions, or scoring. You’ll need to follow your study plan, find community labs, or create your own from scratch. This freedom is great for advanced users, but can be overwhelming for beginners.
GNS3 vs Packet Tracer and NetSim
- Compared to Packet Tracer, GNS3 is significantly more powerful and realistic but less beginner-friendly. Packet Tracer is great for learning concepts; GNS3 is better for mastering real-world implementation.
- Compared to NetSim, GNS3 allows more flexibility and customization but lacks structured learning features. NetSim is ideal for exam preparation with built-in labs and feedback, while GNS3 is more suitable for open-ended exploration.
Practical Use Cases of GNS3
CCNP and CCIE Lab Practice
GNS3 is a favorite among CCNP and CCIE candidates. It supports routing protocols like EIGRP, OSPF, BGP, MPLS, redistribution, NAT, QoS, and VPN configurations—exactly what these certifications demand.
Network Automation Testing
With Docker and Linux VM support, you can simulate real-world network automation environments. Run Ansible, Python, and Bash scripts to interact with your topology, creating a DevNet-friendly lab.
Pre-Deployment Network Testing
Before rolling out changes in production, engineers often replicate the network in GNS3 to test behaviors, verify configurations, and simulate failover scenarios.
Multi-Vendor Training
Training for more than just Cisco? GNS3 supports vendors like Juniper, Palo Alto, pfSense, and Fortinet. If you’re pursuing CompTIA Network+, JNCIA, or vendor-neutral certifications, GNS3 can be tailored accordingly.
Performance Optimization Tips
To get the best experience out of GNS3:
- Run GNS3 VM on a dedicated server or a powerful desktop
- Use linked clones to reduce resource usage.
- Limit console output and use idle-pc values to optimize CPU usage.e
- Segment topologies into layers or phases to focus on specific tasks
- Use Docker for lightweight services like DNS, DHCP, HTTP, and end-host simulation
Integration with exam
While GNS3 doesn’t include built-in labs like NetSim, you can pair it with study platforms like exam. Use exam to follow video courses, then replicate those labs inside GNS3 for hands-on practice. This combination gives you both theoretical and practical understanding.
You can also find community labs and topologies in online repositories, many of which are based on exam’ CCNA and CCNP lesson plans.
Licensing and Legal Considerations
GNS3 itself is free and open-source, but Cisco IOS images are proprietary. You must obtain them legally, usually through a Cisco account or authorized partner. Using unauthorized IOS images violates Cisco’s EULA and can pose legal risks.
Cisco VIRL/CML users can export images for GNS3, and this is often the recommended method for staying compliant with licensing policies.
Verdict on GNS3
GNS3 is a professional-grade emulator that offers a realistic, flexible, and multi-vendor environment for mastering networking concepts. It requires more setup and resources than a simulator, but the payoff is an accurate, powerful lab environment used by both learners and IT professionals.
Graphical User Interface (GUI)
EVE-NG operates fully through a browser-based GUI, making it accessible from any system with network access. The GUI is HTML5-based and highly customizable, although not as intuitive out of the box as CML. The interface allows drag-and-drop topology design, real-time editing, and integration with remote console tools.
Lab Sharing and Multi-User Access
One of the key strengths of EVE-NG, particularly in the Professional Edition, is the ability to host multiple users and enable lab sharing. This is critical for training centers, instructors, and teams working on collaborative labs. The administrator can assign different permission levels to users, controlling access to specific labs or device types.
Snapshot and Version Control
EVE-NG Pro supports snapshot functionality, allowing users to save and revert to different points in lab progress. This is highly useful for testing different configuration paths, troubleshooting issues, and restoring a known-good state.
Cloud Integration and Automation
EVE-NG can integrate with cloud services and CI/CD tools. Advanced users can automate lab deployment using scripts and APIs. This makes EVE-NG a powerful option for DevOps-style networking labs or replicating production environments.
Image Support and Legal Considerations
EVE-NG requires users to provide their device images. These images must be extracted and manually uploaded to the appropriate directory on the server. Supported images include:
- Cisco IOSv, IOSvL2, ASAv, CSR1000v
- Palo Alto PAN-OS
- Juniper vSRX and vMX
- Fortinet FortiGate
- Windows, Linux, and FreeBSD VMs
While this offers flexibility, it also introduces legal and licensing concerns. Users must ensure they have the proper rights to use any software images they import. Unlike CML-P, EVE-NG does not bundle Cisco images for you.
Performance and Hardware Requirements
EVE-NG can be resource-intensive depending on the size of the lab and the number of devices. For example, running 10 CSR1000v instances with 3GB of RAM each will require 30GB of memory alone. As a result, EVE-NG performs best on a powerful workstation or dedicated server with a high core count and memory.
Recommended specs:
- 32 GB RAM minimum (64 GB preferred)
- Intel i7/i9 or Xeon multi-core CPU
- 500 GB+ SSD storage
- Network adapter supporting bridged networking
Pros of EVE-NG
- Multi-vendor support for comprehensive lab design
- Active community and detailed documentation
- Browser-based GUI with remote access
- Snapshot support (Pro version)
- Multi-user and instructor features
- Customizable with Linux CLI and scripting
Cons of EVE-NG
- Complex setup process for beginners
- Users must source and legally obtain images.
- Higher system requirements
- Steeper learning curve
- Some features are limited to the paid version (EVE-NG Pro)
Who Should Use EVE-NG?
- CCNP or CCIE candidates needing a flexible, high-fidelity lab environment
- Network architects or engineers who work with multi-vendor environments
- Cybersecurity professionals designing firewall, VPN, or threat emulation labs
- Instructors and training providers delivering remote-access lab environments
- Advanced users are comfortable with virtualization and manual image integration.
Final Comparison, Legal Image Sources, and Tips for Network Simulation
Choosing the Right Tool for Your Certification Path
Both CML-P and EVE-NG are valuable tools. The choice depends on your needs and level of experience:
Choose CML-P if you:
- Want a hassle-free setup with legal Cisco images
- Focus on Cisco certifications only (CCNA, CCNP, CCIE)
- Need a simple, robust environment with solid documentation.
Choose EVE-NG if you:
- Need to simulate multiple vendors (Juniper, Palo Alto, Fortinet)
- Want to scale up labs with an instructor or team-based environment.
- Are you comfortable with more technical configurations?
Where to Get Legal Cisco Images
For CML-P users:
- Cisco includes licensed IOSv, IOSvL2, ASAv, and CSR1000v images
- These images are pre-configured and ready to deploy
For EVE-NG users:
- Download trial images from Cisco’s website (you must be a registered user)
- Use evaluation licenses from Cisco DevNet, where available.
- Leverage official images from other vendors (Palo Alto, Fortinet, etc.) with a trial license.s
Note: It is illegal to download or use cracked or shared Cisco IOS images without proper licensing.
Tips for Building Effective Labs
- Start Simple: Begin with basic topologies (e.g., 2 routers and a switch) to understand routing and switching concepts.
- Document Your Lab Setup: Keep a log of your lab designs and configurations. This helps with troubleshooting and review.
- Use Templates: Save frequently used topologies as templates to reuse in different scenarios.
- Integrate with Wireshark: Use packet capture features to analyze traffic in detail.
- Practice Troubleshooting: Intentionally break your configuration and practice fixing it to develop real-world troubleshooting skills.
- Schedule Regular Labs: Consistency is key. Dedicate time each week to practice.
Final Thoughts
Network simulators and emulators are a must-have for any serious Cisco certification candidate. Tools like Packet Tracer, CML-P, and EVE-NG offer a hands-on learning experience that textbooks and videos simply can’t match.
- Packet Tracer is ideal for beginners and CCNA-level study.
- Boson NetSim provides structured labs and exam-like scenarios.
- GNS3 is a flexible emulator but requires image sourcing.
- CML-P delivers a legal, polished Cisco experience.
- EVE-NG opens the door to multi-vendor, enterprise-scale simulations.
No matter which you choose, regular lab practice will strengthen your understanding, improve your confidence, and prepare you for success on the exam and in your networking career.
If you want further walkthroughs, lab templates, or guidance on building real-world practice environments, platforms like exam often offer supplementary training materials that align with these tools.
Introduction to Packet Tracer and the Lack of Built-In Labs
Packet Tracer’s Sandbox Experience
Cisco Packet Tracer is widely known in the networking community for being a versatile and feature-rich network simulator. Upon installation, the first interaction a user has with the software is a blank canvas—a sandbox. This sandbox allows users to freely create network topologies using a wide variety of Cisco devices and connection types. For self-starters and those with prior networking experience, this open-ended starting point can be incredibly empowering.
However, the experience may not be the same for everyone. Beginners often need guidance to get started. In such cases, the absence of structured, built-in lab exercises within the default installation of Packet Tracer can be a significant hurdle. While the software itself is free and provides robust functionality, its accessibility for new learners who require structure is limited without external resources.
Where Are the Labs?
Cisco does indeed provide high-quality labs that pair with Packet Tracer, but these are primarily available through the Cisco Networking Academy, commonly known as NetAcad. NetAcad is a formal educational platform offering courses aligned with Cisco certification tracks such as CCNA and CCNP. While these courses come with a comprehensive set of lab exercises designed for Packet Tracer, access is gated behind enrollment in a NetAcad course. These courses are typically offered by community colleges, vocational institutions, and online training platforms.
While NetAcad courses are of high educational value, their cost may be prohibitive for budget-conscious learners or self-taught enthusiasts. This financial barrier means that many users miss out on structured learning opportunities unless they resort to third-party lab providers or rely on open-source community contributions.
The Implications for New Learners
Without guided labs, users unfamiliar with Cisco IOS or basic networking principles can find themselves stuck. They might not know which devices to connect or how to configure them properly. This lack of direction can be disheartening and may deter learners from progressing. While the community has created several free lab files available for download from forums and repositories, these resources lack the organization and curriculum coherence provided by NetAcad.
Summary of Limitations
In essence, Packet Tracer’s greatest strength—its flexibility and sandbox environment—also serves as a limitation for structured learners. The lack of integrated labs upon installation can make the software feel incomplete for those seeking a guided experience. Cisco offers excellent lab exercises through NetAcad, but the paywall restricts access. This creates a gap between what the software can do and what many learners are initially capable of doing with it.
Packet Tracer: The Gold Standard for Cisco Simulation
Rich Simulation Environment
Despite its limitations in structured lab availability, Packet Tracer remains the gold standard in virtual network simulators for Cisco devices. It is well-regarded for simulating the behavior of Cisco IOS with high accuracy. The terminal interface replicates real-world command-line interactions closely enough to be useful for both beginners and advanced users. From configuring VLANs and routing protocols to testing NAT and ACLs, Packet Tracer supports a wide range of scenarios that mimic real-life networking tasks.
Packet Tracer allows users to emulate a variety of devices, including routers, switches, wireless access points, end devices like PCs, and even IoT components. This diversity in device types makes it an ideal tool for understanding complex network topologies.
Custom Labs and File-Based Distribution
Users who seek structure can create custom lab exercises and distribute them as .pkt files. Instructors often build and share such files in educational settings. However, this approach has its drawbacks. Managing and organizing multiple lab files manually can be tedious, especially without an integrated content management system.
The custom lab feature is powerful, allowing educators to provide specific network setups for students to solve. Nevertheless, the user experience lacks the seamless workflow seen in competitors like Boson NetSim, where labs are integrated into the application environment.
Known Software Bugs
Packet Tracer, while mature and stable for the most part, is not without its share of issues. Occasionally, simulated devices may behave in unexpected ways due to bugs. For instance, a routing protocol might not converge correctly, or a configuration change might not propagate as expected. These bugs, while not frequent, can disrupt the learning experience and lead to confusion.
Cisco frequently releases updates to address these issues, but since the tool is used extensively in educational settings, even minor inconsistencies can have outsized impacts. Learners must verify their configurations using multiple tools or consult real-world documentation to confirm expected behaviors.
Summary of Strengths
In summary, Packet Tracer is an invaluable tool for anyone learning networking, especially those targeting Cisco certifications. Its feature-rich environment, high fidelity to Cisco IOS, and extensive device support make it the simulator of choice for countless learners. Yet, its limitations in structured lab accessibility and occasional software bugs are drawbacks that learners must navigate.
What is Boson NetSim?
Overview
Boson NetSim is a paid network simulator developed by Boson, a company well-known for its premium IT training materials and challenging certification practice exams. NetSim is specifically designed for Cisco certification candidates, offering labs that align closely with exam topics and objectives.
This article primarily references NetSim version 12.2.0.24632 running on Windows 10, though recent updates have expanded support to Mac and Linux systems.
Subscription and Licensing
NetSim employs a cumulative licensing model aligned with Cisco certification levels. A license for a higher-level exam includes labs for that exam and all lower-level exams. For example, purchasing a license for the CCNP ENCOR exam grants access to all associated labs, including those from the CCNA curriculum.
A typical one-year subscription costs around 179 USD. This pricing model is straightforward and provides structured access to a wide range of lab exercises. For those who value a structured learning path, the cost can be well worth the investment.
Built-In Lab Access
One of the most notable strengths of NetSim is the integration of built-in labs directly within the application. Unlike Packet Tracer, where users must manually import lab files, all NetSim labs are available through an in-app interface. This streamlines the learning process and eliminates time spent on file management.
Each lab includes clear instructions, a defined set of goals, and assessments that evaluate command accuracy and task completion. The built-in grading system offers instant feedback, which is invaluable for tracking progress and identifying weak areas.
High-Quality Content
Boson is known for the quality of its educational content, and NetSim is no exception. Each lab is crafted to reinforce key networking concepts while also preparing the learner for exam conditions. The instructions are detailed, often including expected command outputs and questions that prompt critical thinking.
Lab content is tightly aligned with Cisco exam objectives. For learners who need clear milestones and structured progress, NetSim’s lab design is ideal. This high-quality content is what makes NetSim a compelling choice for serious certification candidates.
Integrated Lab Tracking
NetSim includes a built-in tracking system that allows users to monitor lab progress within the software. Completed, in-progress, and untouched labs are marked. This feature makes it easy to pick up where you left off or identify labs that require further review.
This functionality is especially beneficial in comparison to Packet Tracer, where no such internal tracking exists unless paired with Cisco’s NetAcad platform.
In essence, Boson NetSim excels in providing a structured, guided learning environment. Its strengths lie in the quality of its labs, ease of use, and integrated tracking features. While it lacks the free-form flexibility of Packet Tracer, it more than makes up for it in structured guidance and educational value.
Introduction to Boson NetSim
What is Boson NetSim?
Boson NetSim is a network simulation tool developed by Boson, a company well known for its high-quality IT training resources and exam preparation materials. NetSim is designed specifically to help learners prepare for Cisco certification exams such as CCNA, CCNP, and others. It provides a realistic networking environment where users can simulate and configure Cisco routers and switches using Cisco IOS commands.
NetSim is a commercial product that stands apart from other simulators due to its focus on educational structure and high-quality labs. Unlike Packet Tracer, which is free, NetSim comes at a cost. However, many learners find this cost worthwhile due to the depth and organization of the content it provides.
NetSim is available for Windows, Mac, and Linux platforms, making it accessible to a broad range of users. The software is frequently updated to support newer Cisco exam objectives and to provide a more stable and accurate simulation experience.
Version Focus
This article focuses primarily on Boson NetSim version 12.2.0.24632. This version runs on Windows 10 and has also received updates to ensure compatibility with Mac and Linux operating systems. The software has been refined over time to become a robust tool for Cisco exam preparation.
Features and Benefits of NetSim
Licensing Structure
One of the unique aspects of NetSim is its licensing model. Each license is tied to a specific Cisco certification exam. When you purchase a license for a particular exam, you gain access to all the labs relevant to that exam and the exams below it. For example, purchasing a CCNP license will also give you access to CCNA-level labs.
The cost of a typical NetSim license is around $179 for a one-year subscription. This pricing model is straightforward and ensures learners receive a large quantity of structured content for their investment.
Lab Quality and Relevance
NetSim’s labs are meticulously crafted to align with Cisco certification exam objectives. Each lab includes detailed step-by-step instructions, expected outcomes, and validation checks. This structure helps reinforce concepts and ensures that learners are practicing relevant skills.
In addition to configuration tasks, many labs also include analytical questions based on command output. These questions are designed to test your understanding and ensure that you’re not just typing commands but also interpreting the results.
Lab Tracking and Progress Monitoring
NetSim includes built-in tools for tracking lab progress. You can see which labs you’ve completed, which ones you’ve started but not finished, and which labs remain untouched. This tracking feature helps learners stay organized and motivated throughout their certification journey.
Lab Accessibility
All purchased labs are integrated directly into the NetSim interface. You don’t need to download or import files manually, which is often required in other simulators like Packet Tracer. This seamless integration allows users to spend more time practicing and less time managing files.
Community and Custom Labs
NetSim includes a community feature where users can share custom topologies. If you design a unique network lab, you can upload it to the NetSim Community. Similarly, you can browse and download labs created by other users directly from the application.
This functionality makes it easy to expand your learning resources beyond the built-in labs. It also fosters a collaborative environment where learners can contribute and benefit from shared knowledge.
Realistic Terminal Experience
The terminal emulation in NetSim is one of its standout features. It closely mimics a real terminal session with Cisco devices. For instance, when you highlight text in the terminal, it is automatically copied to the clipboard. You can then paste text with a simple right-click, just like in a real-world scenario.
NetSim also uses tabbed terminals by default, meaning each network device’s terminal appears in a separate tab within the main window. If preferred, you can detach these tabs and place them in separate windows. This flexibility helps accommodate different workflow preferences.
Device Customization
NetSim allows detailed device customization using a module-based system. When you add a new device to the topology, the software prompts you to select from available modules (Add-ons) to extend its capabilities. Each module is clearly labeled with the types of interfaces it provides.
For example, adding an HWIC-2T module will give your device two additional serial interfaces. Once you’ve created a custom device, it’s saved in the “Recent Devices” panel. You can then drag and drop this customized device into any topology without repeating the setup process.
Reduced Interaction Complexity
Compared to Packet Tracer, NetSim requires fewer clicks to perform the same tasks. For instance, in Packet Tracer, modifying a device’s hardware configuration involves powering it off, adding modules, and powering it back on—steps that must be repeated for each device.
NetSim streamlines this process. With the “Recent Devices” feature, you can quickly reuse customized devices without repeating the configuration steps. This reduces the time and effort required to build complex topologies.
