1. What are the two sublayers of the Data-link layer?

 
 
 
 

2. Which OSI layer is represented by segments?

 
 
 
 
 
 

3. At which layer of the OSI model does DNS operate?

 
 
 
 

4. Which of the following protocols uses TCP?

 
 
 

5. Which protocol uses TCP port 80?

 
 
 
 
 

6. Which protocol uses TCP port 23?

 
 
 
 
 

7. At which layer of the OSI model does SNMP operate?

 
 
 
 

8. Which of these layers is represented by data?

 
 
 
 

9. Which OSI layer converts data packets from the Data Link layer into electrical signals?

 
 
 
 

10. Which OSI layer is represented by packets?

 
 
 
 
 
 

11. Which OSI layer provides logical addressing?

 
 
 
 

12. Which of the following protocols uses UDP?

 
 
 
 
 

13. Which OSI layer is represented in by bits?

 
 
 
 
 
 

14. Which protocol uses UDP port 69?

 
 
 
 
 

15. Which of the following protocol uses both TCP and UDP?

 
 
 
 
 

16. At which layer of the OSI model does DHCP operate?

 
 
 
 

17. What layer of the TCP/IP or DOD model is equivalent to the Transport layer of the OSI model?

 
 
 
 

18. What is the order of encapsulation?

 
 
 
 

19. At which layer of the OSI model does SMTP operate?

 
 
 
 

20. At which layer of the OSI model does FTP operate?

 
 
 
 

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