Checking the License to Find Out if He Can Drive That
Kind of Vehicle
A driver's license typically gives you the right to drive most
popular passenger vehicles on the government roads that your hard-earned tax
money pays for. However, to drive some vehicles, you need a special type of
driver's license. For instance, to drive a big 18-wheel transfer truck, you need
to have a special type of commercial driver's license. And
before you're allowed to risk your life driving a motorcycle, you need a special
type of driver's license as well.
A similar thing happens with security, and it relates to the
second "A" in AAAauthorization. Authorization
refers to the process of figuring out what a particular user is allowed to do.
Figure 17-3 shows a network that uses a
relatively straightforward example of authorization.