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.