Systems Security Certified Practitioner (SSCP) — Question 122

FTP, TFTP, SNMP, and SMTP are provided at what level of the Open Systems Interconnect (OSI) Reference Model?

Answer options

• A. Application
• B. Network
• C. Presentation
• D. Transport

Correct answer:

Explanation

The correct answer is A. Application, as FTP, TFTP, SNMP, and SMTP are protocols that operate at the application layer, which is responsible for providing network services directly to the end users. The other layers, such as Network, Presentation, and Transport, serve different functions, such as routing, data formatting, and ensuring reliable delivery, respectively.