200-901 Question #225: Real Exam Question with Answer & Explanation

The correct answer is C: Telnet. {"question_number": 3, "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 nu

Network Fundamentals

Question

Which protocol runs over TCP port 23?

Options

ASSH
BHTTP
CTelnet
DNETCONF

Explanation

{"question_number": 3, "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.", "generated_by": "claude-sonnet", "llm_judge_score": 5}

Topics

#Protocols#TCP/IP#Port Numbers#Telnet

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