What layer is information gather in passive data collection?
Layer 2 or above.
What is tcpdump?
A tool for capturing, filtering, and analysing network traffic.
What is Wireshark?
A GUI-based sniffer application for ‘sniffing’ data and packets over a network.
What is netstat?
A command-line tool that displays network connections, routing tables, netowrk interface and netowkr protocol statisitcs.