Device or program that enables a computer to transmit data over telephone or cable lines

A) attachment
B) back up
C) boot
D) CPU
E) domain
F) file
G) hardware
H) input
I) interface
J) memory
K) modem
L) output
M) peripheral
N) prompt
O) server
P) software

Modem

A device that modulates and demodulates signals for digital communication over telephone lines or other means.

Transmit Data

The process of sending information or data from one place, person, or electronic device to another through a communication medium.

Cable Lines

Physical transmission media used for telecommunications and internet connections.