Which of the following protocols are susceptible to sniffing?

SNMP

FTP

NNTP

Telnet

FTP, NNTP, Telnet.

Explanation:

These protocols are susceptible to sniffing.

Sniffing:-It is a process of observing and catching all data packets that are passing through a network using sniffing tool. It is a form of wiretap. There are many enterprises whose switch ports are always open. So anyone in same location can use a wire for getting a connection.