Packet sniffing can be used to obtain username and password information in clear text from which one of the following?

A.
SSH (Secure Shell)

B.
SSL (Secure Sockets Layer)

C.
FTP (File Transfer Protocol)

D.
HTTPS (Hypertext Transfer Protocol over Secure Sockets Layer)

Explanation:
FTP has a major flaw. The user ID and password are not encrypted and are subject to packet capture.
Reference: Security + (SYBEX) page 138