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. In networking terms - What is reliability?






2. List three network applications that use UDP






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






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






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






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. What is the port range for well known ports






8. Port 8080 is?






9. What is the default DNS port number?






10. Port 194 is?






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






12. What does segmentation provide to communications?






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






14. ACK is?






15. 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.






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






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






18. IP is designed or not designed to track and manage the flow of packets?






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






20. What is a broadcast domain?






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






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






23. 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?






24. How many bits are in an IPv4 address?






25. What four tasks does the network layer perform?






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


27. Port 443 is?






28. Port 20 is?






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






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






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






32. 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)






33. What is the proper order of SYN sequence?






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






35. MSN messenger uses TCP or UDP?






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






37. Port 69 is?






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






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






40. What is the purpose of sequence numbers?






41. How does UDP keep track of sequence numbers?


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






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






44. Which of the following are true about static and dynamic routing?






45. Port 110 is?






46. What two commands can be used to view a host's routing table?






47. SYN is?






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


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






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