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ECAT - Practice Test - Computer Science - Information Networks - Quiz 3

Practice 10 high yield MCQs on Computer Science from Chapter Information Networks for Practice Test. After submission, get instant results with correct answers and detailed explanations. This is Quiz 3 of the series.

21. What is a firewall?



22. What is a VPN?



23. What is a modem?



24. What is a NIC?



25. How many layers does the OSI model have?



26. How many layers does the TCP/IP model have?



27. What is HTTP used for?



28. What is FTP used for?



29. What is SMTP used for?



30. What does DNS do?



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Instructions: Select one answer per question. After submitting, you will see your score, correct answers, and explanations.

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