Tutorial (revision)

1. A purpose of the OSI model is to provide:

a. A standard for the software/networking industry
b. A standard for the hardware/networking industry
c. A reference for network end users
d. All of the above

2. The OSI model consists of:

a. 5 layers
b. 6 layers
c. 7 layers
d. 8 layers

3. Which of the following layers is more abstract:

a. Physical
b. Data Link
c. Transport
d. Application

4. Which of the following layers is more concrete:

a. Physical
b. Data Link
c. Transport
d. Application

5. Which activities best describe an Application Layer function:

a. Network management software
b. E-mail program
c. Web browser
d. All of the above

6. Which OSI model layers are concerned primarily with user programs:

a. All seven
b. The top three
c. The lower four
d. The bottom two layers

7. Which of the following is used to accomplish a task on a computer

a. Protocol
b. Header
c. OSI Model
d. Application program

8. FTP is used to:

a. Access web sites
b. Send email
c. Word processing
d. Send and receive files

9. Locking a file prevents:

a. Program updates
b. Simultaneous updates
c. Reading the File
d. Writing the File

10. The application program that made the Internet widespread was:

a. Email
b. FTP
c. Word Processing
d. Web browsers and servers

11. The OSI model Presentation Layer:

a. Manages the way computers read information
b. Is where information can be scrambled
c. Is concerned with the order of bytes and integers
d. All of the above

12. Compressed data is a function of:

a. Application Layer
b. Session Layer
c. Presentation Layer
d. Network Layer

13. The layer of a networking protocol stack that is concerned with how information is stored on a computer is:

a. Transport Layer
b. Session Layer
c. Presentation Layer
d. Application Layer

14. Compression is used to:

a. Create less expensive telecommunications equipment
b. Make more efficient use of telecommunications facilities
c. Create a more secure network
d. Provide for permanent communications facilities

15. Which of the following are NOT services of the presentation layer:

a. Data representation
b. Data security
c. Data compression
d. Bit processing

16. ASCII is used to:

a. Represent characters
b. Transmit data
c. Compress data
d. Make data secure

17. Encyrption is used to make data

a. More compact
b. More secure
c. More efficient
d. None of the above

18. The Session Layer is concerned with:

a. Managing dialog
b. Beginning dialog
c. Ending dialog
d. All of the above

19. The OSI layer that deals with starting and stopping conversations is:

a. Application
b. Presentation
c. Session
d. Transport

20. The rules of an electronic conversation are agreed upon at which layer:

a. Application
b. Presentation
c. Session
d. Transport

21. What is the primary purpose of a Transport Layer protocol:

a. Transmit bits across a physical link
b. Transmit frames across a physical link
c. Transmit packets across a network
d. Transmit messages from process to process

22. The Transport Layer is NOT concerned with which of the following:

a. Addressing
b. Connection management
c. Flow control
d. Buffering frames

23. Which of the following is an example of a Transport Layer protocol:

a. Ethernet
b. IP
c. TCP
d. RS-232

24. Which of the layers below is most concerned with getting a packet through a network from source, through intermediate hops, to the final destination:

a. Transport
b. Network
c. Data Link
d. Physical

25. While a packet is traversing a network, the intermediate nodes between the source and destination will deal with which protocol layers:

a. From Presentation Layer down
b. From Session Layer down
c. From Transport Layer down
d. From Network Layer down

26. Which of the following is NOT true:

a. A message is broken up into packets at the Network Layer
b. A packet is broken up into frames at the Data Link Layer
c. A packet is broken up into Data Link frames at the Data Link Layer
d. Data Link frames are broken up into packets at the Network Layer

27. A message, packet, and a frame refer to which three layers (in order):

a. Presentation, Session, Transport
b. Session, Transport, Network
c. Transport, Network, Data Link
d. Network, Data Link, Physical

28. As the Transport Layer is to a message, the Network Layer is to a:

a. Server
b. WAN
c. Ethernet
d. Packet

29. What is an example of a Network Layer protocol:

a. Ethernet
b. IP
c. TCP
d. RS-232

30. What is the primary purpose of a Network Layer protocol:

a. Transmit bits across a physical link
b. Transmit frames across a physical link
c. Transmit packets across a network
d. To get frames across a network

31. Which of the following is found at the Network Layer of a protocol stack:

a. Datagram or packet
b. Frame
c. Bit or byte
d. LU

32. A service of IP, a network layer protocol, is to do which of the following?

a. move packets between TCP (transport layer) processes
b. move frames between NICs
c. move packets between NIC processes
d. none of the above

33. The contents of a MAC frame going from source to destination on a single LAN are:

a. The application data plus the network layer header and trailer
b. The application data plus the headers from the protocol layers above the transport layer
c. The application data plus all the headers in the protocol stack except the data link layer
d. Only the header, trailer and application data

34. Which of the following is true of the Data Link Layer:

a. Frames are generated at the Data Link layer
b. Frames contain both headers and trailers
c. The data unit of a frame contains the application data plus all headers from the layers above the data link layer
d. All of the above

35. One of the services provided by the Data Link Layer to the Network Layer is:

a. The delivery of the network layer information to the next node in the network
b. The delivery of the network layer information to the final destination in the network
c. The delivery of the application layer information to the final destination in the network
d. The error-free delivery of the application data

36. Which of the following is an example of encapsulation:

a. Stripping the header and trailer from an incoming frame
b. Putting a header and a trailer on an outgoing packet
c. Putting a header and a trailer on an outgoing frame
d. Stripping a header and a trailer from an incoming message

37. What is the primary purpose of a Data Link Layer protocol:

a. Transmit bits across a physical link
b. Transmit frames across a physical link
c. Transmit packets across a network
d. To get frames across a WAN

38. The Network Layer is to packets as the Data Link Layer is to:

a. Frames
b. Signals
c. Protocol suites
d. Datagrams

39. Which of the following is an example of decapsulation:

a. Stripping the header and trailer from an incoming frame.
b. Putting a header and a trailer on an outgoing message.
c. Putting a header and a trailer on an outgoing frame.
d. Stripping a header and a trailer from an incoming message.

40. Which of the following best describes the function of a Data Link layer address:

a. Transmits a frame to the next NIC
b. Transmits a packet to the correct port
c. Transmits a frame to the final destination
d. Transmits a frame to the correct socket

41. The purpose of a Data Link Layer protocol is to:

a. Transmit messages to the correct process
b. Transmit packets to the end node
c. Transmit frames to the next node
d. Transmit bits across a physical link

42. What part of a computer frames a packet:

a. Media adapter unit
b. Node port
c. Network Interface Card
d. Hub

43. The layer that is responsible for moving frames between NICs in a LAN is:

a. Physical
b. Data Link
c. Network
d. Transport

44. Which of the following is a concern at the physical layer:

a. Whether or not the data is ASCII or EBCDIC
b. How a binary zero is represented versus a binary one
c. The error free delivery of frames
d. The length of a packet

45. Which layers are primarily concerned with raw data:

a. All seven
b. The top three
c. The lower four
d. The top five

46. What is the primary purpose of a Physical Layer protocol:

a. Transmit bits across a physical link
b. Transmit frames across a physical link
c. Transmit packets across a network
d. Transmit bits across a network

47. The purpose of a Physical Layer protocol is to:

a. Transmit messages to the correct process
b. Transmit packets to the end node
c. Transmit frames to the next node
d. Transmit bits across a physical link

48. Which of the following is NOT a concern at the Physical Layer?

a. the representation of binary data
b. the timing of the binary data
c. the number of bits in a byte
d. the voltage level of each bit