CompTIA Security+ Exam Prep

Answer: B - Network sniffers are programs or devices able to examine traffic on a LAN segment. Traffic that is being transferred over a network medium is transmitted as electrical signals, encoded in binary representation. The sniffer has to have a protocol-analysis capability to recognize the different protocol values to properly interpret their meaning. The sniffer has to have access to a network adapter that works in promiscuous mode and a driver that captures the data.