Wendell's CCENT Skills Blog

Today’s post lists the answers from Convert Masks, Drill 1. If you have questions on any of the 6 problems, post away.  Some related posts: Original problem blog post How to: ICND1 Official Cert Guide (Chapter 14 in Edition 3, Pub 2011) How to: Overview post in this blog

It’s practice, man, practice. Are we really talking about practice? Sure. Plain and simple, just some extra practice converting from one mask format to another. But how fast can you go? And can you reach your time goal every time, for every mask? And can you cull out and reject masks that are simply incorrect? [...]

You pass by a cubicle, and see /26 written on a marker board. Later, you see a config with 255.255.224.0. One other time, you see this binary number: 11111111 11111111 11111111 11111000. How quickly do you: Recognize these numbers as subnet masks? Compute the equivalent masks in the other two formats in your head? This [...]