That article is wrong.
I'll scan some of my CISCO stuff later.

While I didn't read most of it, it seems to be jumbling a few things together and confusing things. In base 2 (which they do say), 1MB = 1024KB. So 2GB = 2048 MB = 2,097,152KB. As opposed to 2GB=2000MB=2,000,000KB.

Hard drive manufacturers, though, use base 10. Which mucks things up. Because they say 1000MB=1GB, they can sell you a 500GB hard drive that is really ~12GB less when it shows up in base 2 on Windows and Linux. Apple switched to base 10 for Snow Leopard to try and ease the confusion over the fact that someone's 500GB hard drive shows up as having only 488GB on a fresh wipe. It's the manufacturers cheaping us out of the full drive size that they promise, because everyone is used to base 2.