January 2012
Intermediate to advanced
312 pages
11h 2m
English
Content preview from Express Learning: Data Communications and Computer Networks
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Transmission Media
1. What are transmission media? What are the different categories of transmission media?
Ans: Transmission media refer to the media through which data can be carried from a source to a destination. Data is transmitted from one device to another through electromagnetic signals. Transmission media are located under and controlled by the physical layer as shown in Figure 4.1.
Figure 4.1 Transmission Media and Physical Layer
The different categories of transmission media include guided (or wired) and unguided (or wireless) media as shown in Figure 4.2. Guided transmission media use a cabling system that guides the data signals ...
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