“Tell the supplier to use an older format”

Older operating systems, surprisely, cannot read CD’s burnt on new computers.

Customer logs a service call:

We can’t read a CD a supplier sent us.

[psychic troubleshooting on] “Supplier is using a newer system (ie. Vista) than what you have (ie. Windows 2000 or XP).  Tell the supplier to burn to a more compatible [...]

Non Routable IP addresses

Non routable IP addresses are IP addresses which are not usable on the internet, but can be used on your home/corporate network.

10.0.0.0 – 10.255.255.255 172.16.0.0 – 172.31.255.255 192.168.0.0 – 192.168.255.255

… as defined by  RFC1597 – http://www.faqs.org/rfcs/rfc1597.html

[...]