6. Network Media //

Question 1

What are the three modern media types?

Answer 1

• Metal wires within cables
• Glass or plastic fibers within cables (fiber-optic cable)
• Wireless transmission

Question 2

Data is encoded into electrical impulses.

Answer 2

Metal wires within cables

Question 3

Data is encoded into pulses of light.

Answer 3

Glass or plastic fibers within cables (fiber-optic cable)

Question 4

Data is encoded via modulation of specific frequencies of electromagnetic waves.

Answer 4

Wireless transmission

Question 5

What are the four main criteria for choosing network media?

Answer 5

• What is the maximum distance that the media can successfully carry a signal?
• What is the environment in which the media will be installed?
• What is the amount of data and at what speed must it be transmitted?
• What is the cost of the media and installation?

Question 6

What are the three common network cables?

Answer 6

The three most common network cables are twisted-pair, coaxial cable, and fiber-optic cable.

Question 7

Ethernet technology generally uses what cables to interconnect devices?

Answer 7

twisted-pair cables

Question 8

In twisted-pair, wires are grouped in pairs and twisted together to reduce what?

Answer 8

to reduce interference

Question 9

The pairs of wires are colored so that you can?

Answer 9

so that you can identify the same wire at each end.

Question 10

was one of the earliest types of network cabling developed.

Answer 10

Coaxial

Question 11

It is also used for connecting the various components which make up satellite communication systems.

Answer 11

Coaxial

Question 12

It is used as a high-frequency transmission line to carry high-frequency or broadband signals.

Answer 12

Coaxial

Question 13

is used in backbone networks, large enterprise environments, and large data centers. It is also used extensively by telephone companies.

Answer 13

Fiber Optics