Implementing and Administering Cisco Solutions (200-301 CCNA) is the exam associated with the CCNA certification. The 200-301 CCNA exam tests the candidate's knowledge and skills related to network fundamentals, network access, IP connectivity, IP services, security fundamentals, and automation and programmability.

Many of you have written to ask us which books to purchase for better preparation for certification exams, we answer you according to the choices made by our classroom teachers and examiners, advising you on the following book. CCNA Routing and Switching 200-125: Official Cert Guide

 Cisco Press has the only self-study guides approved by Cisco for the new CCENT and CCNA Routing and Switching certifications. The new edition of the best-selling two-book value priced CCNA Official Cert Guide Library includes updated content, new online practice exercises, more than 600 practice exam questions, and more than 2 hours of video training, plus the CCENT and CCNA Network Simulator Lite Editions with 43 free Network Simulator labs.


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Whether you've been advised by a coworker, supervisor, or a thread on Reddit, everyone has their favorite simulator or emulator. Someone who primarily uses GNS3 will always claim that it's superior to VIRL, and vice-versa.

These are the most popular software for gaining hands-on Cisco lab experience for the routing and switching track certifications. Many of these tools can also be used to test networking technologies for deployment in the real world. However, we will focus as much as possible on the certification exam use case.

A simulator is a piece of software that, as the name implies, simulates a network topology composed of one or more network devices. The network devices being simulated are not real network devices, and are not capable of passing live network traffic the same way that a real network device could. Instead, each network device is a piece of software pretending to be a real network device to the best of its ability.

As a result, network devices within a simulator are limited to the commands and features programmed into the simulation. For this reason, many advanced features (such as DMVPN, Policy Based Routing, and so on) that real network devices are capable of are not present in simulated counterparts.

The key benefit of simulators is that they tend to be extremely lightweight. Simulator software can run on just about any modern computer without worrying about processor, memory, or storage requirements.

Packet Tracer is Cisco's visual simulation tool that simulates network topologies comprised of Cisco routers, switches, firewalls, and more. Packet Tracer was originally designed as an educational aid for Cisco's Networking Academy (better known as NetAcad) but is an excellent simulator for anyone pursuing an entry-level Cisco certification, such as the CCENT or CCNA R&S.

These network components are invaluable when studying for the CCNA. You can even experiment with devices outside exam prep. What does it look like when a laptop accesses a network through a wireless connection? How is the configuration of an ASA firewall different from an ISR router? Packet Tracer makes it easy to add a device to an existing topology.

Making a Realistic Lab. Packet Tracer offers different methods to connect and configure devices. Most of the time, you'll probably left-click on each device in the simulator and configure it through the CLI tab. However, you can also simulate how network engineers would provision devices in the real world. You can accomplish this by connecting a computer to each device via console cable and then configuring the network device through the PC's terminal. You can even use this to configure remote management of the network device through Telnet or SSH, then connect the PC to a management network and configure each device remotely.

Custom Exercise Distribution. When you create a custom exercise, you must save the activity as a file and distribute this file to all interested parties. The lack of a centralized distribution method results in some challenges. For example, if you (or someone) needs to update the exercise to fix a bug, correct lab instructions, or add additional content, you'll need to redistribute updated version of the exercise file.

Bugs. All software has bugs, and Packet Tracer is no exception. Packet Tracer's bugs tend to be more prominent than other simulators or emulators, perhaps due to its popularity and widespread use through Cisco's NetAcad courses. A quick Google search shows users repeatedly report odd bugs where the configuration of a device is correct, but the behavior of the device is unexpected. These bugs are typically fixed by saving the simulation file, then reloading Packet Tracer, after which the device is behaving as expected. This is a problem because you may spend precious time troubleshooting rather than labbing.

Cisco's Packet Tracer remains the gold standard in virtual network simulators. For free software, it offers a feature-rich sandbox environment for experimenting with a large number of network device types, platforms, and connections. Furthermore, Packet Tracer's simulation of Cisco's IOS software exhibits the closest behavior to actual network devices, and its built-in terminal client is very similar to the real thing.

For budget-conscious learners that find the sandbox environment intimidating, the lack of built-in labs covering common CCENT and CCNA exam topics could be considered a negative. To alleviate this, the software allows for the creation of custom labs, but the file-based distribution of these labs presents its own challenges. Despite the software's maturity, Packet Tracer has issues with lab-breaking bugs that cause simulated network devices to behave in unexpected ways.

Finally, the limited implementation of the simulated Cisco IOS software makes Packet Tracer most appropriate for the CCENT and CCNA R&S, but not necessarily the CCIE. While utilizing Packet Tracer to lab exam topics for other Cisco certification exams is possible, Packet Tracer should not be considered a primary tool for doing so.

Boson is an IT training organization well-known for their high-quality Cisco certification exam coursework and challenging practice exams. Another key product of Boson's is NetSim, an application that simulates Cisco network routers and switches.

Licensing Maps to Exams. Boson's licensing model is cumulative just like Cisco certification levels. Each Boson license maps specifically to a Cisco certification exam, and includes the labs for the preceding exams, too.

Lab Quality. While the number of labs you receive depends on the price, every Boson lab is high quality and tailored to a Cisco certification exam. Each lab comes with detailed instructions regarding what needs to be configured and verified within the related network topology. Furthermore, most labs ask insightful questions about the output of commands observed in the CLI of the networking device, which helps reinforce understanding about what is being configured and why it needs to be configured.

Additionally, NetSim calls out the type of interfaces that each module adds. For example, if you want to add an HWIC-2T network module to a device, NetSim explicitly tells you that the addition grants two additional serial interfaces that the device can use.

Lack of Topology Information. The network topology window shows a limited amount of information, especially while a simulated topology is running. For example, you can't see the link state of each connection between network devices, nor do you have any indication that the device is actively transmitting data. The primary source of feedback for this type of information is the device itself. While this could help prepare you for a role as a remote network administrator where physical access to devices is not possible, the additional feedback in simulation would be particularly helpful for visual learners.

Lack of Topology Customization. Unlike most other network simulators and emulators, NetSim does not have a way to add colorized shapes to a network topology. Aside from network devices and connections, you can only add text-based notes and labels to the topology. This is a fairly minor point, but is important when rehearsing some exam topics, such as multiarea OSPF, where colored shapes illustrating the different areas comes in very useful.

Cannot Modify Active Topology. Once a network topology is running, you can't modify it until you stop the topology, which shuts down the simulated network devices. If you need to add a new network device or a new connection to your network topology, you must stop the entire topology, modify it as needed, then start the topology once more. This behavior is very similar to current versions of Cisco's VIRL. This is a minor point, as the topology itself starts and stops very quickly, but the less time you spend managing simulator, the better!

Boson NetSim's strongest feature is the built-in labs that directly map to the exam topics of specific Cisco certification exams. For existing patrons of Boson's courseware and practice exams, these labs are an excellent practical aid for reinforcing networking concepts. The fact that labs (whether they were built by Boson or built by the community) can be accessed directly through the NetSim application simplifies the labbing experience and lets you focus on learning instead of prerequisite tasks.

The software's weakness is in the creation, manipulation, and interaction of network topologies in the sandbox environment. It is more difficult to create aesthetically-pleasing network topologies in NetSim compared to other network simulators and emulators. An active network topology does not provide very much visual feedback regarding the status of devices, links, and transmission of data. NetSim's simulated Cisco IOS software has small quirks not exhibited by actual Cisco IOS software, particularly when using context-sensitive help or executing non-existent commands, which is a common mistake that many networking novices make. 2351a5e196

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