Data transmission systems are technologies that enable the transfer of data between devices or networks. They can use various mediums, such as cables, fiber optics, or wireless signals, to send information. Common examples include Wi-Fi, Bluetooth, and Ethernet, which facilitate communication in homes, offices, and across the internet. These systems are essential for modern communication, allowing devices like computers, smartphones, and servers to exchange information quickly and efficiently. They rely on protocols, such as TCP/IP, to ensure that data is transmitted accurately and securely, making them vital for both personal and business applications.