3. Physical Network Media Flashcards Preview

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Flashcards in 3. Physical Network Media Deck (9)
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1
Q

What is attenuation

A

Is the weakening of signals during transmission.

2
Q

Where does attenuation exist

A

In both wired and wireless transmission. Length of wire impacts the severity of attenuation.

3
Q

Electromagnetic Interference (EMI):

A

A disturbance generated by an external source that affects an electric circuit.

4
Q

what caused EMI?

A

Electric storms or noisy electrical equipment.

5
Q

Cross-talsk

A

Crosstalk is electromagnetic interference from one unshielded twisted pair to another twisted pair, normally running in parallel.

6
Q

Fiber optic cables

A

proven to be more secure than the other media. They have very low transmission loss, not affected by EMI and preferred choice for high volumes and long distance calls.

7
Q

What is a diverse routing

A

The method of routing traffic through split-cable facilities or duplicate facilities

8
Q

Where is an alternate routing?

A

The method of routing information via an alternative

medium, such as copper cable or fiber optics is called alternate routing.

9
Q

difference between last mile and long haul

A

Last mile provide redundancy for local loop whereas long haul provide redundancy for long distance availability