Why a wider connection carries more
A network link has a limited capacity for representing and transmitting information. In a radio connection, that capacity is related to how much of the radio spectrum the signal can use; in a wired link, it depends on the signaling technology and the physical medium. More usable capacity lets the link encode more bits in each second, much as a wider pipe can carry more water at once.
Bandwidth is usually expressed as a rate, such as megabits per second. It describes the link’s ceiling under suitable conditions—not a promise that every application will receive that rate. Protocol overhead, interference, equipment limits, and other users sharing the link can all reduce the data rate a device actually gets. That observed rate is called throughput.
Capacity is not delay
A message can travel over a high-capacity link and still take time to arrive. The delay from sending a signal to receiving it is called latency; it depends on factors such as distance, signal propagation, and the time routers spend handling packets. Bandwidth answers how much data can be carried over time, while latency helps determine how long a particular exchange takes.
The distinction matters most when many devices are active. A video stream, a download, and a backup may each need a share of the same link. Raising its capacity can let more traffic fit without queuing, but it does not make signals travel faster. In practice, a connection’s usable capacity is only as large as its narrowest bottleneck along the route.
