Quiz
Computer Networking

  1. In what layer is the User Datagram Protocol found?
  2. In what layer is the TCP protocol?
  3. How many layers does the Open Systems Interconnection Model (OSI) have?
  4. What company uses the Open Systems Interconnection Model (OSI) for its certification exams?
  5. With what are copper cables insulated?
  6. True/False? Cat5, Cat5e, and Cat6 are the most common twisted-copper cables in computer networking.
  7. What happens to an electrical impulse during crosstalk?
  8. Cat6 transmits data __________ but over a __________ distances when at higher speeds?
  9. What insulates fiber cables?
  10. How can crosstalk lead to a network error?
  11. True/False? Lower-level protocols can request data again if affected by crosstalk.
  12. Which is a lot more fragile: fiber or copper cables?
  13. The Network Access Layer and the Network Interfaces are other names for what network layer?
  14. True/False? Hubs aren't common today because they're prone to collision domain via copper cables.
  15. What's the most common cable used in computer networking?
  16. Switches are part of the Physical Layer, along with cables; connectors; and switches. True/False?
  17. What protocol learns the optimal path by which to forward traffic?
  18. Hubs remember what devices are connected on each interface, while switches cannot. True/False?
  19. Multiple computes can run on the same node. True/False?
  20. Nodes can be both a server and a client. True/False?
  21. What is modulation?
  22. What's another name for modulation in computer networking?
  23. How many bits can a network cable transmit per second?
  24. What's the difference between collision domain and crosstalk?
  25. How many twisted-pair cables are inside each jacket of a Cat6 cable?
  26. An RJ45 Plug terminates what kind of cable?
  27. Two types of lights might appear on an RJ45 Plug -- a Link LED and a _____ LED?
  28. CSMA/CD (Carrier-Sense Multiple Access with Collision Detection) is used by the Ethernet protocol to eliminate what?
  29. "Octet" is another name for _____ in computer networking?
  30. What does "MAC" address stand for?
  31. How many bits does a MAC address have?
  32. What does CSMA/DA stand for?
  33. What is CSMA/DA?
  34. Which part of the OUI determines if the Ethernet intends to communicate with one destination address or two?
  35. Why is "FF:FF:FF:FF:FF" NOT an Ethernet Broadcast Address, despite it having all Fs.
  36. In computer networking, a Broadcast involves every LAN device using a broadcast address. True/False?
  37. True/False: Data packets are a highly specialized, structured collection of info presented in a specific order?
  38. Network interfaces at the physical layer can connect into data across a network link. True/False?
  39. Fill in the blanks of the Ethernet Frame: 1. Preamble 2. __________ 3. Destination MAC Address 4. __________ 5. __________ 6. Payload 7. __________
  40. List how many bytes are in each of the fields above.
  41. What section of an Ethernet Frame isn't transported to Payload?
  42. What is an important calculator in all computer networking for data integrity?
  43. The Ethernet protocol reports on data but doesn't perform data recovery. True/False?
  44. How many bits are in an IP address?
  45. What is a Dynamic Host Configuration Protocol (DHCP)?
  46. How many bytes are in the Header Length of an IP Datagram headers in IPv4?
  47. After the Header Length, what are the 10 other fields of an IP Datagram?
  48. Where in the Ethernet Frame is an IP Datagram encapsulated?
  49. How many bits are in a TTL field?
  50. How many bits are in the Source and Destination IP Addresses, respectively?
  51. What is the payload of an IP Datagram?
  52. What's the range of the 1st octet of a Class D IP Address?
  53. What's the base-2 notation for a Class C IP Address?
  54. What's the binary value of a Class D IP Address?
  55. A Class D IP Address is used for multicasting. What is multicasting?
  56. What does CIDR, which has mostly replaced the Address Class System, stand for?
  57. At what layer are MAC addresses?
  58. What is an ARP (Address Resolution Protocol)?
  59. True/False? The IP Datagram forms while encapsulated in the Ethernet Frame.
  60. True/False? A destination MAC address is necessary for a transmitting device to complete the Ethernet Frame header.
  61. Which receives the response to an ARP Response: the host device or the server?
  62. How many bits is a subnet mask?
  63. How many bytes is an IP Datagram header in IPv4?
  64. How many numbers less than the Host ID can a subnet ID have?
  65. What is 255 reserved for in a subnet?
  66. True/False? It's not standard to refer to the entire number of host IDs available for a subnet?
  67. How many bits are in Class B of a network ID, or for subnetting?
  68. How many bits are in Class C of a network ID, or for subnetting?
  69. CIDR has replaced much of the Address Class System. What does CIDR stand for?
  70. What demarcates a network in CIDR?
  71. True/False? The IP address and the subnet mask are the same length?
  72. What layer is the MAC address part of?
  73. True/False? An incorrect subnetting setup is a common IT problem.
  74. True/False? The Host ID identified what gateway network to send a datagram.
  75. How many IP addresses does a Class B Address Class System have?
  76. What operator does a computer use to determine if an IP address exists on the same network?
  77. What are 2 types of Interior Gateway Protocols?
  78. True/False? Interior Gateway Protocols share info within multiple nodes of an autonomous system.
  79. An Autonomous System is a collection of independent networks controlled by a single operator. What is an example of an Autonomous System?
  80. True/False? An ASN (Autonomous System Network) never changes when it represents more networks or hops, just the AS in the core routing table.
  81. How many bits are in an ASN?
  82. True/False? ISPs are where Exterior Gateway Protocols are significant in IT.
  83. What's the most common Link-State Protocol? (Hint: OSPF)
  84. What is a Non-Routable Address Space?
  85. What are the 3 IP addresses reserved for Non-Routable Address Space?
  86. True/False? NAT (Network Address Translation) allows computers on a Non-Routable Address Space to communicate with other network devices on the Internet.
  87. How many bits are in a port?
  88. What is 10.1.1.100:80 an example of?
  89. What is Port 25? Port 9100? Port 21?
  90. Fill in the blanks for the TCP Header: Source Port (     ) | Destination Port (     ) ||||| _________________________ (32) ||||| Acknowledgment Number (32) ||||| _______________ (4) | _______________ (16) ||||| Options (     ) | Padding ||||| __________ (Varies)
  91. True/False? Source ports are chosen from ports known ephemeral ports.
  92. True/False? The Urgent Pointer Field of a TCP Header is a major part of modern computer networking?
  93. What are the 2 additional layers of the OSI Model?
  94. True/False? RST can indicate the server hasn't recovered from malformed or missing segments in a TCP connection.
  95. True/False? An ACK of "1" indicates no need to examine the acknowledgment number.
  96. What is buffering?
  97. True/False? SYN in the Control Flag ensures the transmitting end knows to examine the Sequence Field.
  98. After the Recursive Name Server sends a request to the Root Name Server, to what DNS Server type does the Root Server direct its inquiry in turn?
  99. How many root servers are there?
  100. The __________ Name Server redirects a query to the client computer performing the lookup with the __________ Name Server to contact?
  101. What are the 5 DNS Server Types?
  102. DNS listens on what port?
  103. UDP has error recovery. T/F?
  104. How many data packets does it take a Name Resolution at the Application Layer?
  105. Unless the request is too large to fit into a single datagram, DNS normally uses what protocol from the Transport Layer?
  106. A domain can't point to many/different IP addresses? T/F?
  107. Many domain names can't point to the same IP address? T/F?
  108. What 4 things must be configured for each computer on a TCP/IP-based network?
  109. A DHCP ACK has an expiration before which the client must re-negotiate a lease for DHCP configuration info? T/F?
  110. What does DSL stand for?
  111. DSL and Dial-Up Connection both transmit data over phone lines. They also use the same type of modems to do so? True/False?
  112. In macOS and Linux, how does an end user send an interruption event to stop a ping command?
  113. In macOS and Linux, what are the two mandatory arguments of a netcat (nc) command?
  114. What are the 6 IP Addresses for Level 3 Communications' Public DNS Server?
  115. What are the 2 IP Addresses for Google's Public DNS Server?
  116. What is the Loopback Address in IPv4?
  117. What is the Loopback Address in IPv6?
  118. What's another name for a modem? (Hint: _________/___________)
  119. How many kilobytes (KB) are in a megabyte (MB)?
  120. What two bands does WiFi commonly operate on?
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Related: Computer Networking 2 (Notes)
Related: Computer Networking 3 (Notes)
Related: Operating Systems (Quiz)
Related: IT Fundamentals (Quiz) (Notes)
Related: "Cybersecurity and Cyberwar" (2020)