24Which of the following is not an application layer service?
A. Network virtual terminal
B. File transfer, access, and management
C. Mail service
D. Error control
Answer:D
24Which of the following is not an application layer service?
A. Network virtual terminal B. File transfer, access, and management C. Mail service D. Error control
Explanation: Application layer is the topmost layer in the OSI model. Network virtual terminal, mail service, file transfer, access and management are all services of the application layer. It uses protocols like HTTP, FTP, and DNS etc. to provide these services.