At which DoD model layer does Telnet, TFTP, SNMP, and SMTP function?
A. Host-to-Host layer
B. Process/Application layer
C. Internet layer
D. Network Access layer
B. Telnet, TFTP, SNMP, and SMTP all function at the Process/Application layer according to the DoD model. The Process/Application layer is a macro layer combining the Application, Presentation, and Session layers of the OSI model.
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