Despite being a newer version, the Cisco IOSv images are famously "light," often requiring only 512MB of RAM per instance, making them better for large-scale topology simulations.
Unlike the "Lightweight" images, the Advanced Enterprise K9 set allows you to practice almost any scenario found in CCNP or CCIE Enterprise exams. How to Use the Image
Later "M" releases patch critical vulnerabilities and stability issues found in earlier virtual images.
This signifies the Advanced Enterprise Services feature set, which includes full routing protocols (BGP, OSPF, EIGRP), advanced security features, and MPLS.
While the keyword looks like a jumble of characters, it is actually a specific file name for a Cisco IOSv (Virtual IOS) image. Specifically, it refers to an Advanced Enterprise version (M Train) used frequently in network simulation labs.
This template is reviewed by Szabolcs Bakos. I am a freelance Web (UI/UX) designer.
You can find me on Facebook, Twitter, LinkedIn or My website.