Martin, a Certified Ethical Hacker (CEH), is conducting a penetration test on a large enterprise network. He suspects that sensitive information might be leaking out of the network. Martin decides to

Raw sniffing involves capturing all packets traversing the network without filtering or modifying them, allowing Martin to analyze the entire data stream at a low level. This technique provides the most comprehensive insight into sensitive information potentially leaking, as it doesn't limit capture to specific protocols or addresses.

MAC flooding is an attack technique to overwhelm a switch's CAM table, potentially enabling sniffing but is not a sniffing technique itself for data capture.

ARP poisoning is an attack technique used to redirect traffic through an attacker, enabling sniffing but is not the sniffing technique itself.

DNS poisoning is an attack technique to redirect users to malicious websites by corrupting DNS caches, not a method for comprehensively sniffing all network data.