Choose the c7200-adventerprisek9-mz.152-4.S3.bin file that has the checksum 79ffe4050b2cac60d51af8b953bb02b7. I do not know how I found this file, surely it fell from the back of a truck and I certainly have no permission to use it (nor do you). The official Cisco IOS images for academic use are included in the (paid) membership for VIRL - Cisco Modeling Labs
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This is not the correct file
Yes
Unlike the Cisco simulation, the use of eNSP images is free (especially because it is a Linux that simulates the actual software and not a copy of the real software in itself as it is the case of IOS images).
They range from router and switch images to firewall and virtual machine images, covering a wide range of network devices and platforms. The EVE-NG Images Collection is a valuable resource for network professionals, offering them a comprehensive library of images to choose from, ensuring that their virtual network simulations closely align with the actual network setups they may encounter in their work.
I downloaded GNS3 thinking I would be able to load the image for a TP-Link TL-ER6020 but nope... seems like it mostly likes Cisco stuff. On top of that it requires of course that your images are currently paying Cisco their extortion tax on the firmware for your own device. While I have a Cisco ASA 5505 sitting on my desk, its not current anymore for its license (thanks to the firmware crapping out). Even Cisco's own techs couldn't seem to figure out why it won't save a new firmware/config.
Personally, if you are just wanting to do lab type simulations, I find that Cisco Packet tracer works well enough and you don't have to load any images in it. You do technically have to be a student in a Cisco certification course, but I found a course online for $10 with a special promo code and have been using Packet Tracer happily since then.
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