Lesson 3

Question 1

What is the link efficiency of full duplex?

Answer 1

more than 50%’.

Question 2

The frequency range of a channel is 4000hz to 6500hz. What is the bandwidth?

Answer 2

2500 hz

Question 3

What is simplex mode of communication?

Answer 3

Only one sender and receiver.

Question 4

What kind of channel does broadband transmission use?

Answer 4

bandpass channel

Question 5

The link efficiency of a channel is 0.2 and bandwidth is 4000hz. What is the throughput?

Answer 5

800 hz

Question 6

Crosstalk and attenuation are NOT a problem in which of the following media?

Answer 6

Fiber optic cable

Question 7

Which of the following media is comparatively cheaper, lighter and easier to install?

Answer 7

Twisted pair cable

Question 8

Which is a standard connector for unshielded twisted pair cable that resembles RJ-11 telephone jacks?

Answer 8

RJ-45

Question 9

Which of the following connectors are also used with multimode and single-mode fiber optic cables for accessing gigabit ethernet?

Answer 9

MT-RJ

Question 10

CAT 3 and CAT 5 belong to which of the following cable categories?

Answer 10

Shielded twisted pair (STP)

Question 11

Why is it important to know the three types of communication in networking?

Answer 11

All answers are correct

The three different channel types all have their ideal uses. It is essential to know which type to use so that you can implement a strategy that is the most efficient, effective, and affordable solution.

Question 12

Which one of the communication channels allows for data to be sent and received in both directions, but not at the same time?

Answer 12

Half-duplex

Question 13

Which service would a simplex channel be ideal for?

Answer 13

All answers are correct

Question 14

Which of the communication channel types allows for information to flow in both directions at the same time?

Answer 14

Full-duplex

Question 15

Which of the communication channel types would be the ideal choice for making a phone call?

Answer 15

Full-duplex

Question 16

In reference to computers and the internet, what is throughput?

Answer 16

Throughput refers to the actual speed of your data

Question 17

In reference to computers and the internet, what is an appropriate analogy for throughput?

Answer 17

Throughput is like a clogged artery

Question 18

Many family members using the network connection at the same time reduces:

Answer 18

Throughput

Question 19

What does Mbps stand for?

Answer 19

megabits per second

Question 20

In reference to computers and the internet, what is bandwidth?

Answer 20

Bandwidth is the theoretical speed of your data

Question 21

What does latency mean?

Answer 21

Latency is the delay between when you request data and the time you actually receive it

Question 22

What does throughput mean?

Answer 22

Throughput is the actual amount of data you get in a certain amount of time

Question 23

Which of these is NOT true?

Answer 23

High latency is better than low latency

Question 24

What does bandwidth mean?

Answer 24

Bandwidth is the theoretical maximum speed of your data

Question 25

Which of these statements is true?

Answer 25

You should expect an average throughput which is less than the maximum speed, and you should expect an average delay called latency

Question 26

What is the main advantage of using a shielded twisted pair (STP) cable for a network connection?

Answer 26

To cut back on electrical interference

Question 27

Which of these is the most common cable type to connect a home network to a cable modem using an internet service provider?

Answer 27

Coaxial

Question 28

What is the main purpose of having a twisted pair cable?

Answer 28

To reduce electromagnetic interference from outside sources

Question 29

When internet service providers use fiber optic cables, which cable type are they most likely to use for home networks?

Answer 29

Plastic optical cable

Question 30

In unshielded twisted pair cables, which category starts being able to push gigabit network speeds (1000+ Mbps)?

Answer 30

CAT5e

Question 31

An advantage of optical fiber over traditional copper wiring is:

Answer 31

lighter, less bulky

Question 32

Optical fiber cable provides a higher transmission speed than copper wiring because:

Answer 32

Light moves faster than an electrical signal

Question 33

The core strand of an optical fiber can be made of what type of material?

Answer 33

Glass or Plastic

Question 34

The type of fiber used typically for long distance runs is:

Answer 34

single mode fiber

Question 35

What part of an optical fiber cable reflects light back into the core as the cable bends?

Answer 35

cladding