Final answer:
Without the transmission speed, we cannot calculate the maximum number of bits on the link or the width of a bit in meters. The product of delay and bandwidth represents the amount of data that can be in transit on the link simultaneously.
Step-by-step explanation:
To determine the maximum number of bits that will be on the link at any given time when a 1,000,000-bit file is sent from station A to station B, we would need to know the transmission speed or the bandwidth of the link. Since that information is not provided, we cannot calculate the exact number. In a general sense, the maximum number of bits would equal the total number of bits sent if the bandwidth allows for the entire file to be on the link simultaneously.
The product of delay and bandwidth, often referred to as the bandwidth-delay product, represents the amount of data (in bits) that can fill the link. It's also known as the "size of the pipe" in networking terms. The delay is the time it takes for a bit to travel from the sender to the receiver, and the bandwidth is the number of bits that can be transmitted per second. Essentially, this product gives us a measure of the link's capacity to hold data during transmission.
The width of a bit in the link relates to the physical distance a bit covers on the link during a certain amount of time. To calculate this, we would need the propagation speed of the signal on the link (which depends on the medium, e.g., copper wire, fiber optic cable, or wireless transmission) and the transmission speed (bandwidth).