What is a channel bandwidth?

Explanation

**Step-by-Step Solution:**

1. **Definition of Channel Bandwidth**: Channel bandwidth refers to the range of frequencies that a communication channel can effectively transmit. It is the difference between the highest and lowest frequencies in the channel.

2. **Understanding Frequency Range**: The bandwidth is measured in hertz (Hz) and indicates how much data can be transmitted over the channel. For example, if a channel can transmit frequencies from 300 Hz to 3000 Hz, its bandwidth is 3000 Hz - 300 Hz = 2700 Hz.

3. **Impact of Bandwidth on Data Transmission**: A wider bandwidth allows for more data to be transmitted in a given amount of time. This is because a larger range of frequencies can carry more signals simultaneously, leading to higher data rates.

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