Which of the following could illegally capture network user passwords?

A.
Data diddling

B.
Sniffing

C.
Spoofing

D.
Smurfing

Explanation:
Sniffing is the action of capture the information going over the network.
Most popular way of connecting computers is through Ethernet. Ethernet protocol works by
sending packet information to all the hosts on the same circuit. The packet header contains the
proper address of the destination machine. Only the machine with the matching address is
suppose to accept the packet. A machine that is accepting all packets, no matter what the packet
header says, is said to be in promiscuous mode. Because, in a normal networking environment,

account and password information is passed along Ethernet in clear-text, it is not hard for an
intruder to put a machine into promiscuous mode and by sniffing, compromise all the machines on
the net by capturing password in an illegal fashion.