As a region with volcanic activity, Indonesia has mountain ranges, with its highest peak on Papua, with Puncak Jaya, standing 4,884 meters (16,024 feet) above sea level. Major rivers in Indonesia include the Mahakam and Barito rivers, and the country's largest lake is Lake Toba in Sumatra.
To compensate, analog signals are amplified, ad digital signals are regenerated through repeaters. In a Half-duplex transmission, signals can travel in both directions over a medium BUT in only one direction at a time. When signals can travel in both directions over a medium simultaneously, the transmission is considered full duplex. A form of transmission that allows multiple signals to travel simultaneously over one medium is known as multiplexing. In multiplexing, the single medium is logically separated into multiple channels, or sub channels. Throughput is the amount of data that the medium can transmit during a given period of time.
The simplest transmission media is a two-wire transmission line. There are two wires insulated from each other, open to free space. This type of media is suitable for connecting equipments that are separated less than 50 meters. This media can support data rate up to a theoretical maximum of 19 Kbps. A two-wire transmission media can directly connect two computers.