4. 7.4
7-1 GUIDED MEDIA
Guided media, which are those that provide a conduit
from one device to another, include twisted-pair cable,
coaxial cable, and fiber-optic cable.
Twisted-Pair Cable
Coaxial Cable
Fiber-Optic Cable
Topics discussed in this section:
22. 7.22
7-2 UNGUIDED MEDIA: WIRELESS
Unguided media transport electromagnetic waves
without using a physical conductor. This type of
communication is often referred to as wireless
communication.
Radio Waves
Microwaves
Infrared
Topics discussed in this section:
30. 7.30
Microwaves are used for unicast
communication such as cellular
telephones, satellite networks,
and wireless LANs.
Note
31. 7.31
Infrared signals can be used for short-
range communication in a closed area
using line-of-sight propagation.
Note
32. Questions
Define Transmission Media. [2]
List the applications of guided and unguided media. [6]
What is the principle of refraction? Write a short note on Fiber
optics. Clearly state its types, advantages and disadvantages.
[6]
Provide the classification of Transmission media. Explain in
detail each one of them. [10]
Explain physical description and application of Microwave,
Broadcast Radio and Fiber optics. [10]
Explain the types of guided and unguided media with suitable
diagrams. [10]
Discuss in detail about the physical description, application
and transmission characteristics of the guided Media. [10]
7.32