Palo Alto Networks Cybersecurity Entry-Level Technician (PCCET) — Question 35

Which TCP/IP sub-protocol operates at Layer4 of the OSI model?

Answer options

• A. HTTPS
• B. FTP
• C. UDP
• D. SSH

Correct answer: C

Explanation

The correct answer is C, UDP, which is a Layer 4 protocol that provides a connectionless communication method. Options A (HTTPS), B (FTP), and D (SSH) are application-layer protocols that operate above Layer 4, thus they do not fit the criteria of this question.