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Transmission Medium and Switching in Computer Networks

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Transmission Medium and Switching in Computer Networks

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Questions and Answers

What is the main difference between guided media and unguided media?

Guided media use a physical conductor to transport signals, while unguided media transport electromagnetic waves without a physical conductor.

What are the three major classes of guided media?

The three major classes of guided media are twisted pair cable, coaxial cable, and fiber optics.

Where does transmission media sit in the OSI model?

Transmission media is part of the Physical Layer (Layer 1) in the OSI model.

Why is twisting important in twisted pair cable?

Twisting in twisted pair cable reduces electromagnetic interference and crosstalk between pairs. Signup and view all the answers

What are the three types of guided media discussed in the text?

Twisted-pair cable, coaxial cable, and fiber-optic cable Signup and view all the answers

What is the main purpose of twisting the conductors in twisted-pair cable?

To achieve better noise rejection Signup and view all the answers

What is the central core conductor made of in coaxial cable?

Solid or stranded wire (copper) Signup and view all the answers

How does fiber optics transmit signals?

In the form of light Signup and view all the answers

List three advantages of fiber optics cable over coaxial and twisted-pair cables.

Higher Bandwidth, Less signal attenuation, Immunity to electromagnetic interference Signup and view all the answers

What is a disadvantage of fiber optics cable mentioned in the text?

Installation and maintenance cost Signup and view all the answers