Questions and Answers

Lecture 1: Networking Basics

Lesson 1: Network Communications

Exercise 1.1: Networking Definitions

Match the concepts in the numbered list with the definitions that follow it.


  1. Full-duplex
  2. Broadband
  3. Circuit switching
  4. Client/server network
  5. Baseband


  1. A medium that carries multiple signals simultaneously
  2. A network in which a connection is established before any data is transmitted
  3. A network on which systems perform designated roles
  4. A medium that carries traffic in both directions simultaneously
  5. A medium that carries only one signal
  6. 1. d
    2. a
    3. b
    4. c
    5. e

Lesson 2: The OSI Reference Model

Exercise 1.2: OSI Model Layers

For each of the protocols, functions, or concepts listed below, specify the OSI model layer with which it is associated.
  1. Ethernet
  2. Data-link
  3. Dialog separation
  4. Session
  5. Transfer syntax
  6. Presentation
  7. Routing
  8. Network
  9. Segmentation
  10. Transport
  11. SMTP
  12. Application
  13. Differential Manchester
  14. Physical

Lecture Review

  1. Which layer of the OSI reference model is responsible for controlling access to the network medium?
  2. The data-link layer
  3. On which type of network does each computer maintain its own permissions and security settings?
  4. A peer-to-peer network
  5. A language that two computers "speak" while communicating over a network is called __________.
  6. A protocol
  7. A series of LANs connected together by any means is called __________.
  8. An internetwork
  9. What kind of network is often used to connect horizontal segments on a large enterprise internetwork?
  10. A backbone
  11. Which layer of the OSI model is responsible for translating different syntaxes?
  12. The presentation layer
  13. A network in which the medium carries only one signal is called __________.
  14. Baseband
  15. An example of full-duplex communications is __________.
  16. A telephone call
  17. The address of a packet's final destination is specified in the __________ layer.
  18. Network
  19. TCP is an example of a __________ layer protocol.
  20. Transport
  21. Electrical voltages, light pulses, and infrared waves are all examples of types of __________.
  22. Signals
  23. A technology used to connect LANs at distant locations is called __________.
  24. A wide area network (WAN)
  25. The type of network in which data is split into discrete units that are transmitted over the network individually is called __________.
  26. A packet-switching network
  27. The process by which a receiving system sends messages instructing a sending system to slow down its transmission rate is called __________.
  28. Flow control
  29. A protocol that uses a handshake to establish a connection before sending data is called __________.
  30. Connection oriented