The correct answer is: C. 50% voice channels, 50% control channels.
Voice channels are used to carry the actual voice conversation, while control channels are used to manage the call, such as signaling the start and end of a call, and transferring the call from one cell to another.
In a typical cellular system, there are about 50% voice channels and 50% control channels. This is because voice channels are used for a relatively short period of time, while control channels are used for a longer period of time. For example, when you make a phone call, the voice channel is only used for the duration of the call, while the control channel is used for the entire call, from the moment you dial the number to the moment you hang up.
The percentage of voice and control channels can vary depending on the specific cellular system. For example, in a system with a lot of traffic, there may be more control channels than voice channels, in order to keep the system running smoothly.
Here is a brief explanation of each option:
- Option A: 95% voice channels, 5% control channels. This is not a realistic percentage, as it would mean that there are not enough control channels to manage the calls.
- Option B: 5% voice channels, 95% control channels. This is also not a realistic percentage, as it would mean that there are not enough voice channels to carry the voice conversations.
- Option C: 50% voice channels, 50% control channels. This is a realistic percentage, as it provides a good balance between voice and control channels.
- Option D: 25% voice channels, 75% control channels. This is also a realistic percentage, but it would mean that there are more control channels than voice channels. This could lead to problems with call quality, as there may not be enough voice channels to carry all of the calls.