Final answer:
Signal propagation delay is affected by bandwidth, distance, and packet size. Propagation speed in a medium is constant, but wavelength varies with frequency. Sound speed is determined by medium properties.
Step-by-step explanation:
The signal propagation delay is influenced by several factors including bandwidth, distance, and packet size. Hence, the correct answer to this question is d. All of the above.
Now, addressing the parts of the question:
- The propagation delay is influenced by bandwidth because higher bandwidth allows for more data to be transmitted in a given time, potentially reducing the time it takes for a single piece of data to propagate.
- Distance affects propagation delay because signals take time to travel over a medium, and the longer the distance, the longer the delay.
- Packet size matters because larger packets take more time to transmit completely as compared to smaller packets, thus potentially influencing delay.
The speed of propagation is often constant in a given medium, but the wavelength changes as the frequency changes. The relationship between propagation speed (v), frequency (f), and wavelength (λ) is expressed by the formula v = f λ.
Regarding waves, the speed of sound depends on the properties of the medium, not the frequency or wavelength of the wave.