Test your basic knowledge |

Cisco Network Fundamentals - 2

Subjects : cisco, it-skills
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. What information does a router need to successfully forward packets?






2. If a router needs to send a packet but doesn't know the next hop or destination network - what can it do?






3. What is the purpose of TCP/UDP port numbers?






4. What is a broadcast domain?






5. UDP stands for?






6. Ports can be shared at the same time? (t/f)

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7. What is a common device used to divide/break up a broadcast domain into smaller broadcast domains?






8. Port 110 is?






9. Port 520 is?






10. Port 8080 is?






11. UDP does or does not create a session?






12. Which protocol provides connectionless network layer services? IP - TCP - UDB or OSI?






13. Routers add routes for the connected networks to their ________________ .






14. What are the transport layer's responsibilities?






15. Which of the following are true about IP?






16. Why does TCP use a sequence number in the header?






17. During data transfer - What is the receiving host responsible for?






18. What is the purpose of sequence numbers?






19. Which of the following are not functions of the network layer?






20. What is the name of the process of removing the OSI Layer 2 information from an IP packet?






21. When an OSI Layer 4 PDU has been encapsulated at the network layer it is called a ______________.






22. Port 20 is?






23. Which of the following are true about network layer encapsulation?






24. Port 443 is?






25. The value of the ACK number field is equal to the client ISN plus ___________ (number)?






26. On a particular network how would you determine the default gateway address for a host?






27. When an IP packet is decapsulated - the information in the packet is handed to the upper or lower layers for delivery and processing?






28. End systems use port numbers to select the proper application. What is the lowest port number that can be dynamically assigned by the host system? 1 - 128 - 256 or 1024?






29. Port 69 is?






30. How many bits are in an IPv4 address?






31. Which protocol ensures more reliable delivery between applications - TCP or UDP?






32. What is the purpose of the ToS field in the IPv4 header?






33. What is the proper order of FIN sequence?






34. What is the default DNS port number?






35. Routes to remote networks with the associated next-hops can be manually configured on the router. What is the same for this type of routing?






36. What is the protocol number for UDP?






37. At the transport layer - which of the following controls is used to keep a transmitting host from overflowing the buffers of a receiving host? Choose one: Best effort - encryption - flow control - congestion avoidance?






38. Which is a connectionless protocol - UDP or TCP?






39. For a network layer packet to travel between hosts - it must be handed down to the _________________ layer - for another layer of encapsulation called framing - and then encoded and put onto the ____________ layer to be sent to the next router.






40. An example of a communication that sends a letter to someone without notifying the recipient in advance is called?






41. Which of the following are true about TCP and IP?

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42. How many bytes of overhead do TCP segments carry? How many does UDP carry?






43. Name the private address blocks






44. ACK is?






45. What is the proper order of SYN sequence?






46. Encapsulation occurs at all - some or none of the layers of the OSI model?






47. Determines how much data a sending host running TCP/IP can transmit before it must receive an acknowledgment






48. List three network applications that use UDP






49. What does segmentation provide to communications?






50. The three-way handshake performs what three functions?