1. Which layer is immediately below the data link layer?

a. Physical b. Network c. Transport d. Application

2. What does flow control determine?

a. When a device can transmitb. Whether a device is connection oriented or connectionlessc. Both a and bd. Neither a nor b

3. Converting data into signals by transforming and encoding the information to produce electromagnetic signals is the functionality of a ___________.

a. sourceb. transmitterc. receiverd. destination

4. Which of the following describes stop-and-wait flow control?

a. It is simple b. It is complexc. It is best with small frames d. It is best over long distances

7. Which of the following is the simplest error-detection method?

a. Parity b. Longitudinal redundancy checkingc. Checksum checking d. Cyclic redundancy checking

8. Which type of error detection uses binary division?

a. Parity b. Longitudinal redundancy checkingc. Checksum checking d. Cyclic redundancy checking

9. Which of the following is also called forward error correction?

a. Simplex b. Retransmissionc. Detection-error coding d. Error-correction coding

13. The IEEE 802.3 specification divides the data link layer into two sub-layers: the Logical link control sub-layer and the medium access control sub-layer. An example of one implementation of medium access control is _______________.

a. TCP protocolb. CSMA/CD protocolc. IP protocold. UDP protocol