Final answer:
The correct storage area for data captured by a network sniffer is a buffer. It is a dynamic space in RAM used to hold data temporarily for processing or transmission.
Step-by-step explanation:
When a sniffer captures data from a network, it stores the data in a buffer—a dynamic area of RAM that holds specified data. The correct answer to the question is b) Buffer. Network sniffers, also known as packet analyzers or network analyzers, use buffers to temporarily hold data while they are processing or before the data is transmitted to where it will be analyzed or stored. This is necessary because data on a network moves quickly, and the sniffer often can't process the information as rapidly as it's being received. Therefore, a buffer is essential for efficiently handling the incoming data.