|  | 1.5 | Digital Bandwidth
| 1.5.3 | Media bandwidth differences
Bandwidth is a very useful concept. It does, however, have limitations. No matter how you send your messages, no matter which physical medium you use, bandwidth is limited. This is due both to the laws of physics and to the current technological advances. [Place the cursor of your mouse over the numbers in the animation to the left to view different bandwidth information.] Figure illustrates the maximum digital bandwidth that is possible, including length limitations, for some common networking media. Always remember that limits are both physical and technological. Figure summarizes different WAN services and the bandwidth associated with each service. Which service do you use at home? At school?