January 2012
Intermediate to advanced
312 pages
11h 2m
English
Content preview from Express Learning: Data Communications and Computer Networks
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1
Overview of Data Communications and Networking
1. What is the difference between communication and transmission?
Ans: Both communication and transmission deal with the exchange of information. However, a few differences between them are listed in Table 1.1.
Table 1.1 Differences Between Communication and Transmission
| Communication | Transmission |
| • It refers to exchange of meaningful information between two communicating devices. | • It refers to the physical movement of information. |
| • It is a two-way scheme. | • It is a one-way scheme. |
2. What is meant by data communication? What are the characteristics of an efficient data communication system?
Ans: Data communication refers to the exchange of data between two devices through ...
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