Final answer:
The narrow slice of spectrum on the 2.4 GHz band can cause congestion when pressed on a 2.4 GHz cordless phone due to interference from other technologies.
Step-by-step explanation:
The narrow slice of spectrum that appears on the 2.4 GHz band can cause congestion when the button is pressed on a 2.4 GHz cordless phone. This is because the 2.4 GHz band is also used by other technologies like Wi-Fi networks, which can create interference and congestion.
Example:
Imagine a classroom where all the students are talking at the same time. It becomes difficult to understand and communicate with each other because of the congestion. Similarly, when multiple devices use the 2.4 GHz band simultaneously, it can lead to congestion and slower performance.