1. In _____ transmission, the binary signals representing the data are transmitted one after the other.
2. In ______ tranmission, more than one series of data bits can be transmitted at the same time.
3. Which of the following diagrams illustrate a serial half duplex connection?
4. Parallel transmission can be achieved by __________________________________________________________________
5. Parallel tranmission is considered _________________ since there is a central clock that controls the timing of data sent on different wires.
6. The three classes of serial transmission are:
7. Half duplex allows communication in only one direction. It requires only one channel.
8. Duplex method allows communication in__________________________________________________________________
9. In Half duplex there are two channels and the direction is switched after the completion of transmission in the other direction.
10. Serial tranmission can operate either in synchronous mode with a mutual clock or asynchronous mode (no mutual clock)
11. What are common examples of serial communication standards?
12. Modern serial connection standards such as ______________ are used to connect hard drives to motherboards and are very fast.
14. Parallel communication is only suitable or practical over ______ distances due to increased cable cost.
15. In parallel tranmission, as the wires get longer, parallel transmission can suffer from what is known as:
16. A common use of parallel communication used to be to:
17. A current and common use of parallel communication can be found on a PC motherboard. The _________ is a parallel system.
18. Which of the following diagrams illustrates a serial duplex connection?
19. Which of the following diagrams illustrates a parallel half duplex connnection?
20. Parallel transmission sends ________________________ while serial transmission only sends one bit at a time.
21. Reasons why serial transmission may be preferred to parallel transmission include:
1. Parallel communication requires more wires and hardware
2. Parallel has a higher cost than serial
3. Parallel is more difficult to manage when setting up
4. Parallel is more difficult to repeat or switch
5. Parallel communication needs data to be synchronised across wires (risk of skew)
6. Greater change of errors in Parallel
7. Parallel has limiting factors - e.g. increased errors or reduced speed with cable length
8. Parallel communication carries the risk of cross-talk between wires
9. Parallel communication has a greater chance of errors as it uses fewer wires (less cross talk chance)
1,2,3,7 and 9
1,2,3, and 6
All of the items on the list are valid, as they demonstrate that serial would have greater advantages over parallel
22. If data is sent over a long distance, serial communication may be better because:
23. Generally speaking, serial communication requires more cables or wires
24. Parallel communication is typically best used only over short distanes (else data skew might occur)
25. Hardware for serial communication is generally speaking, considered much more expensive to manufacture than parallel communication hardware.