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. 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.






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 port range for well known ports






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






5. Which of the following is true about IP?

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6. 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?






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






8. How does UDP keep track of sequence numbers?

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






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






11. Which of the following are true about IP?






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






13. What is a broadcast domain?






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






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






16. Port 69 is?






17. IP requires that each sending and receiving device have a __________ IP address.






18. TCP is a ________________ layer protocol.






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






20. Which protocol provides just the basic functions for efficiently delivering data pieces between appropriate applications - TCP or UDP?

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21. What is the netstat utility used for on a host?






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






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






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






25. Port 8080 is?






26. The router a network uses to send and receive messages beyond the network is called a ___________ router.






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






28. What is the default DNS port number?






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






30. ACK is?






31. What are the transport layer's responsibilities?






32. What information does a router need to successfully forward packets?






33. TCP header provides for






34. UDP stands for?






35. What are the three basic characteristics of IPv4?






36. Port 443 is?






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






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






39. List three network applications that use TCP






40. Which characteristics are part of TCP? Pick two: Reliable - connectionless - no flow control - resends anything not received?






41. 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?






42. 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?






43. When the client end of the session has no more data to transfer - it sets the ___________ flag in the header of the segment? (Hint: three-letter acronym)






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

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45. In networking terms - What is reliability?






46. What is the port range for Registered ports






47. Port 194 is?






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

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49. Port 520 is?






50. MSN messenger uses TCP or UDP?