NET 102 - Networking Essentials II

Review for First Test

The following questions are provided to help you study for the first test. Do not expect to see these exact questions on the test.

  1. What is CompTIA? Which of their certifications is this class most about?

  2. What is the ISO-OSI model? What organization created it?

  3. What are the names of the seven layers of the OSI model? How are they normally arranged in a chart?

  4. What was the name of the Department of Defense unit that created what became the Internet?

  5. How many educational institutions were first connected to that network?

  6. Which of the OSI layers is concerned with methods for connecting to other networks? What protocol are we told does this in the most common suite?

  7. Which of the OSI layers is concerned with guaranteed delivery of packets? What protocol are we told does this in the most common suite?

  8. How many layers are in the TCP/IP or Department of Defense networking model? What are they called in the TCP/IP model?

  9. In the OSI model, which layer is associated with cable types and bits being transported across a medium?

  10. What is a NIC? Why would you want one? How can you connect to a network if you don't have one?

  11. What kind of address is associated with a NIC? What layer of the OSI model does this place a NIC on?

  12. The text describes a generic frame in chapter 1. What are the four fields that are mentioned in this chapter that must be in a frame?

  13. What is a MAC address? What are two ways it is commonly written?

  14. How many characters are in a MAC address when it is written in Hexadecimal? How many characters would that be in binary?

  15. What is the MAC broadcast address?

  16. On what layer of the OSI model does network addressing take place?

  17. What are the two versions of IP addresses that you need to know about? How many bytes are needed to write each one?

  18. What are the five classes of IP addresses in the most commonly used version?

  19. Which OSI layer is associated with segments? What is segmentation, with regard to that layer?

  20. Suppose you had two browser windows open at once, each going to a different web site. Which OSI layer holds the processes that keep track of which traffic from the Internet goes to which window?

  21. Describe a star network.

  22. Describe a bus network.

  23. Describe a ring network.

  24. Describe a mesh network. What kind of network does the text say is the most likely to use this configuration.

  25. What are the seven fields the text describes in a standard Ethernet frame? What is the purpose of each of the three fields that were not in the generic description of a frame?

  26. What are the three classic methods for media access in networks? Which one is typically used in an Ethernet?

  27. What is a collision domain? Is it better for a network to have more of them or fewer of them?

  28. Parse the name of the networking standard called 100BaseT.

  29. What are the wire and pin assignments in the TIA/EIA 568B standard? How about 568A? Why do you need to know both of them?

  30. Describe the wire and pin assignments used in a crossover cable that has RJ-45 connectors on both ends. What is the alternative to having RJ-45 connectors on both ends of a crossover cable?

  31. If you are looking at at switch that has one light per port, what would be the meaning of a steady glow from that light? What would it mean if that light was flashing?

  32. What is the difference between a hub and a switch? Which OSI layer does each one belong on? What TCP/IP layer does each one belong on?

  33. What kind of addresses do routers use that distinguish them from switches?

  34. An older network device is called a bridge. What other network device is it most like? Which OSI layer does it belong on?

  35. Bridging loops can occur if bridges lie to each other about where devices are. What protocol is used to solve this problem?

  36. What is the difference between 10BaseT and 100BaseT?
    What is the difference between 100BaseT and 100BaseFX?

  37. Explain the differences between simplex, half-duplex, and full duplex.

  38. What are some of the advantages fiber optic cable has over copper cable?

  39. What characteristics would enable you to recognize a fiber optic cable with ST connectors? How about SC connectors? LC connectors?

  40. What is another name for cable standards that support 1000 Megabits per second throughput? What is the generic name for standards one level of technology above that?

  41. What typically characterizes fiber optic standards that are limited to 2000 meter segments, as opposed to 5000 meter segments?

  42. How is a logical topology different from a physical topology?

  43. In a fully redundant mesh, what is the formula to calculate the number of connections needed to attain full redundancy?

  44. What kind of connectors were historically used with thin Ethernet? What grade of cable was typically used?

  45. What are the parts of a coaxial cable?

  46. What electrical rating is used to tell whether two kinds of coaxial cable are compatible on the same network?

  47. Shielded twisted pair cable may be mistaken for coax due to what characteristics? What is the shield for?

  48. What are the components of unshielded twisted pair cable?

  49. How do you choose which of the three described jacket types of UTP are appropriate for your needs?

  50. Why are pairs of wire twisted in UTP and STP cables?

  51. In structured cabling, what are horizontal runs? What two parts of a cabled structure do horizontal runs connect?

  52. What is a run?

  53. What is the difference between an IDF and an MDF? What is another common term for an IDF?

  54. What is a common width for an equipment rack in an IDF?

  55. If your IDF has both 110 blocks and 66 blocks in it, what is the most probable use for each of them? What networking element are such blocks parts of?

  56. What is your text's argument for using stranded copper cable for patch cables?

  57. What feature would allow you to tell the difference between a CAT 5e cable and a CAT 6a cable, other than the printing on the jackets and boxes?

  58. Is the point of demarcation a device or a location? If you are thinking of a device, what are three acronyms that can all be used for that device?

  59. AN MDF may contain a vertical cross connect. If so, what is its purpose?

  60. What distance factor may determine where to place an IDF?

  61. Fiber optic cable does not pass electrical signals. What does it pass?

  62. What is EMI? What kind of cables should be used where this is an issue?

  63. What is signal attenuation?

  64. What is a special sort of problem that fiber optic cable has if it is bent too far?

  65. What distinguishes a PCI slot from a PCIe x1 slot?

  66. What distinguishes a PCIe slot from a PCI slot that is the same length?

  67. What is the difference between bonding and link aggregation?