Which protocol runs over TCP port 23?

The correct answer is C. Telnet. Telnet uses TCP port 23. It is a legacy remote terminal protocol that transmits data in plaintext, making it insecure. SSH (port 22) is its secure replacement. HTTP uses port 80. NETCONF uses TCP port 830. Memorizing these well-known port numbers is essential for networking…

Network Fundamentals

Question

Options

ASSH
BHTTP
CTelnet
DNETCONF

How the community answered

(25 responses)

A
4% (1)
C
88% (22)
D
8% (2)

Explanation

Telnet uses TCP port 23. It is a legacy remote terminal protocol that transmits data in plaintext, making it insecure. SSH (port 22) is its secure replacement. HTTP uses port 80. NETCONF uses TCP port 830. Memorizing these well-known port numbers is essential for networking certifications.

Topics

#Protocols#TCP/IP#Port Numbers#Telnet

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