Which of the following uses port 23 by default?
A.
TELNET
B.
IMAP
C.
FTP
D.
SNMP
Explanation:
Telnet is a network protocol used on the Internet or local area networks to provide a bidirectional
interactive text-oriented communication facility using a virtual terminal connection. User data is
interspersed in-band with Telnet control information in an 8-bit byte oriented data connection over
the Transmission Control Protocol (TCP).