<human>:  What are the differences between DSL and fiber optics internet?
<bot>: The main difference between DSL and fiber optics internet is the way in which they transmit data. DSL, or Digital Subscriber Line, uses telephone lines to send data, while fiber optics internet sends data through light pulses over thin glass strands. Fiber optics typically has higher data transmission rates than DSL, meaning that it can be faster and more reliable; however, DSL is more widely available than fiber optics internet. In terms of security, fiber optics is often more secure as the data is harder to intercept.