Bandwidth represents the theoretical maximum capacity, while the data rate (or throughput) is the actual, real-world speed that is reduced by factors like latency, protocol overhead, network ...
Learn about bandwidth: its definition, how it's measured, its impact on internet speed, and essential factors affecting data ...
Figure 3. Single- and three-mode propagation in optical fibers. Single-mode longer wavelength signal can only propagate in a single-mode but a shorter wavelength signal can propagate in three-modes.