3. Physical Network Media

Question 1

What is attenuation

Answer 1

Is the weakening of signals during transmission.

Question 2

Where does attenuation exist

Answer 2

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

Question 3

Electromagnetic Interference (EMI):

Answer 3

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

Question 4

what caused EMI?

Answer 4

Electric storms or noisy electrical equipment.

Question 5

Cross-talsk

Answer 5

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

Question 6

Fiber optic cables

Answer 6

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.

Question 7

What is a diverse routing

Answer 7

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

Question 8

Where is an alternate routing?

Answer 8

The method of routing information via an alternative

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

Question 9

difference between last mile and long haul

Answer 9

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