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 is the protocol number for UDP?






2. How does UDP keep track of sequence numbers?


3. What are the transport layer's responsibilities?






4. In networking terms - What is reliability?






5. Port 20 is?






6. TCP is a ________________ layer protocol.






7. List three network applications that use TCP






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






9. 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.






10. Port 520 is?






11. What is the default DNS port number?






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






13. Pieces of information about a route that a routing table contains






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. List three network applications that use UDP






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






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






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






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






20. Which is a connection-oriented protocol - TCP or UDP?






21. What is the port range for dynamic or private ports






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


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






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






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






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






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






28. What is the purpose of sequence numbers?






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






30. Port 443 is?






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






32. What does segmentation provide to communications?






33. Which of the following are true about IP?






34. How many bits are in an IPv4 address?






35. 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?






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






37. MSN messenger uses TCP or UDP?






38. What is a broadcast domain?






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






40. SYN is?






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






42. 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?






43. MTU stands for ?






44. What four tasks does the network layer perform?






45. Port 110 is?






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






47. Port 25 is?






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






49. What is the proper order of SYN sequence?






50. UDP does or does not create a session?