Whenever a packet with size greater than Transport Layer MSS and / or MAC Layer MTU (which is 1500 bytes in NetSim) is generated, it gets fragmented in the application layer. Then the packet is sent as multiple frames, and makes it impossible to calculate the exact queuing time. Netsim Lite For Mac 3,9/5 4331 reviews. More on Netsim Free Software Data Added 1: June 21, 2007 Free Software Directory PHP Script will.

If you are going to take a networking exam like CCNA, CCNP… it is better to practice with real routers. But when the budget is not big enough or you can only access to hardware in your school then router simulator softwares are the best things you can get for free. The followings are a number of free and popular router simulators you can download and practice with:

GNS3 – GNS3 is a graphical network simulator that allows simulation of complex networks. It is an excellent complementary tool to real labs for Cisco network engineers, administrators and people wanting to pass certifications such as CCNA, CCNP, CCIP or CCIE. This project is an open source, free program that may be used on multiple operating systems, including Windows, Linux, and MacOS X.

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Packet Tracer – Packet Tracer 5.0 is the latest version of Cisco Networking Academy’s comprehensive networking technology teaching and learning software. Innovative features of Packet Tracer 5.0, including powerful simulation, visualization, authoring, assessment, and collaboration capabilities, will help students and teachers collaborate, solve problems, and learn concepts in an engaging and dynamic social environment. Moreover, it’s totally free! You can download this software but you need to register first or you can find a mirror download with google (with keyword “download packet tracer”)

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SemSim – The free trial version (2.3MB) offers some CCNA exam router simulation labs & 20 flash cards

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Boson NetSim – Boson offers three certification-focused products, NetSim for CCENT 7.0, NetSim for CCNA 7.0 and NetSim for CCNP 7.0. The NetSim for CCNA 7.0 product contains CCNA-specific lab exercises that cover the skill set you will need to prepare for your CCNA exam. The demo version (21.58MB) is a good choice to get started.

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CertExamsoffers advanced network simulators including router / switch / terminal simulator. The simulators help in preparing for networking exams such as ccna or jncia. It would also be very helpful for those who want to get started with configuring Cisco or Juniper routers in a simulated environment. The demo version (6.95MB) is limited to:

– Six lab exercises

– Router simulator is limited to User EXEC, Previleged EXEC, and Global Configuration mode commands.


RouterSim’s CCNA Network Visualizer – You can design, build and configure your own network. The demo version is 44.49MB. It is ideal for:

– Anyone studying for the Cisco® CCNA™ 640-802 exam

– Deployment over a LAN network

– Distance education and deployment on a Citrix server or Microsoft Terminal Services

– Corporate trainers and employees

– Students at colleges, universities, and technical institutes

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  • By Sean Wilkins, Wendell Odom
  • Published Feb 27, 2017 by Pearson IT Certification. Part of the Network Simulator series.


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  • Powerful network simulator software allows CCNA candidates to explore configuration and troubleshooting scenarios in a realistic environment
  • Learn hands-on skills with structured labs designed by an expert instructor
  • Unique learning tool that helps reinforce key networking concepts
  • Interactive simulation engine helps teach by doing, the most effective method of learning

Audio & Video



  • Copyright 2017
  • Edition: 1st
  • DVD
  • ISBN-10: 0-7897-5777-X
  • ISBN-13: 978-0-7897-5777-7

The most effective router and switch simulator for hands-on CCENT skills enhancement.

CCENT ICND1 100-105 Network Simulator helps you develop and improve hands-on configuration and troubleshooting skills without the investment in expensive lab hardware. This state-of-the-art, interactive simulation software enables you to practice your networking skills with more than 250 structured labs designed to help you learn by doing, the most effective method of learning.

Experience realistic network device responses as you perform each lab, which include detailed instructions, topology diagrams, critical-thinking questions, hints, and answers. Working through the labs, you will quickly become proficient with all the common Cisco IOS version 15 router and switch commands on the CCENT

exam. Unlike other simulators on the market, the lab scenarios included in the CCENT ICND1 100-105 Network Simulator are far more complex, challenging you to learn how to perform real-world network configuration and troubleshooting tasks.

Master the hands-on skills needed to succeed on the CCENT exam, including:

• Router and switch navigation and administration

• Ethernet LAN switches

• VLANs, trunking, and switch security

• Connected and static routes

• RIPv2 configuration and verification

• Access Control Lists (ACL)

• NAT, syslog, and NTP configuration

• IPv4 and IPv6 addressing and subnetting

• Network troubleshooting

Filemaker pro 12 advanced download mac. CCENT ICND1 100-105 Network Simulator includes four different types of labs and over 3,000 hands-on tasks that help you build the skills needed to succeed on the exam and in the real world.

Skill Builder labs are narrowly focused, enabling you to practice your configuration skills on a single topic. Coverage includes:

• Router and switch CLI navigation

• Interface status, ping, and traceroute

• Configuring IP addresses and DHCP servers

• VLAN and trunking configuration

• Switch security

• Connected, static, and default routes

• RIPv2 configuration and verification

• ACL analysis and configuration

• NAT configuration

• Syslog and NTP configuration

Subnetting Exercises labs help you to perform subnetting calculations quickly and accurately, a critical skill for

success on the CCENT exam. Topics covered include:

• IPv4 and IPv6 subnet ID calculation

• IP address rejection

• IP route selection

• VLSM overlaps

• IPv6 EUI-64 calculation

• Selecting VLSM routes

Configuration Scenario labs are more broadly focused, combining multiple technologies into configuration scenarios that mimic real-world environments. These labs are longer and more complex, challenging you to put your configuration skills to the test. Topics covered include:

• Network fundamentals and administration

• IP addressing

• Static and default routing

• RIPv2 configuration

• Standard and extended ACLs

• NAT configuration

Troubleshooting Scenario labs present typical troubleshooting scenarios and require you to explore the misconfigured network, isolate the issues, and correct the problems. These are very complicated and

realistic scenarios that truly test your ability to perform the job of a network engineer. Topics covered include:

• Switch forwarding

• VLAN troubleshooting

• Path analysis

• Port security

• Network discovery

• IP addressing and routing

• DHCP server troubleshooting


System Requirements:

Requires internet connection for product activation and updates.

Windows system requirements (minimum):

• Windows 10 (32/64-bit), Windows 8.1 (32/64-bit), or Windows 7 (32/64-bit)

• 1 gigahertz (GHz) or faster 32-bit (x86) or 64-bit (x64) processor

• 1 GB RAM (32-bit) or 2 GB RAM (64-bit)

• 16 GB available hard disk space (32-bit) or 20 GB (64-bit)

• DirectX 9 graphics device with WDDM 1.0 or higher driver

• Adobe Acrobat Reader version 8 and above

Mac system requirements (minimum):

• macOS 10.12, 10.11, 10.10, or 10.9

• Intel core Duo 1.83 GHz

• 512 MB RAM (1 GB recommended)

• 1.5 GB hard disk space

• 32-bit color depth at 1024x768 resolution

• Adobe Acrobat Reader version 8 and above

Sample Content

Table of Contents

ICND1 100-105

Skill Builders

Part I: Network Fundamentals and Administration

Part II: Addressing

Part III: LAN Switching

Part IV: Routing

Part V: Services

Subnetting Exercises

Part I: Subnet ID Calculation

Part II: Address Rejection

Part III: Route Selection

Part IV: VLSM Overlaps

Part V: IPv6 EUI-64 Calculation

Part VI: Selecting VLSM Routes

Configuration Scenarios

Part I: Network Fundamentals and Administration

Part II: Addressing

Part III: LAN Switching

Part IV: Routing

Netsim Lite For Mac

Part V: Services

Troubleshooting Scenarios

More Information

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