21. Prior to installation of an intrusion prevention system (IPS), a network engineer would place a packet sniffer on the network, what is the purpose for using a packet sniffer?

Вариант ответа 1 - A. It tracks network connections.

Вариант ответа 2 - B. It monitors network traffic.

Вариант ответа 3 - C. It scans network segments for cabling faults.

Вариант ответа 4 - D. It detects illegal packets on the network.