CSIS 330 quiz 3 questions answers 22 practice.pdf

LIBERTY UNIVERSITY CSIS 330 QUIZ 3. QUESTIONS &

ANSWERS.

Attempt Score

22 out of 25 points

Question 1

1 out of 1 points

____________________________ occurs when the fiber-optic media are not precisely aligned

to one another when joined.

Selected Answer:

Misalignment

Question 2

1 out of 1 points

What is the purpose of cladding in fiber-optic cables?

Selected Answer:

Prevention of light loss

Question 3

1 out of 1 points

What happens if the CSMA process fails and two devices transmit at the same time,

creating a data collision?

Selected

Answer:

The data sent by both devices will be corrupted and will need

to be resent.

Question 4

1 out of 1 points

Which Wi-Fi standard operates in the 2.4-GHz frequency band and offers speeds of

up to 54 Mbps?

Selected Answer:

IEEE 802.11g

Question 5

1 out of 1 points

In which type of industry is fiber optic being used to provide always-on broadband

services to homes and small businesses?

Selected Answer:

FTTH and access networks

Question 6

0 out of 1 points

The more dispersion there is in a fiber-optic cable, the less the loss in signal strength

and the greater the effective distance of the signal over the fiber.

Selected Answer:

True

Question 7

1 out of 1 points

The ___________________ topology is the most common physical LAN topology.

Selected Answer:

Star

Question 8

1 out of 1 points

Which of the following items do not comprise the physical components addressed in

physical layer standards?

Selected Answer:

Software applications

Question 9

1 out of 1 points

A wireless device will experience degradation in performance based on its distance

to a wireless access point.

Selected Answer:

True

Question 10

1 out of 1 points

In _______________________________, all nodes compete for the use of the medium but have

a plan if there are collisions.

Selected Answer:

Contention-based access

Question 11

1 out of 1 points

UTP cable consists of _______ pairs of color-coded wires that have been twisted

together and then encased in a flexible plastic sheath that protects them from minor

physical damage.

Selected Answer:

Four

Question 12

1 out of 1 points

What type of physical topology involves all end systems chained to each other and

terminated in some form on each end?

Selected Answer:

Bus

Question 13

1 out of 1 points

Which of the following statements is false?

Selected

Answer:

Controlled access methods have less overhead than contention-

based Media Access Control methods.

Question 14

1 out of 1 points

Which of the following is not a common type of fiber-optic termination and splicing

error?

Selected Answer:

Crossed cables

Question 15

1 out of 1 points

_________________________ refers to the physical connections and identifies how end

devices and infrastructure devices such as router, switches, and wireless access

points are interconnected.

Selected Answer:

Physical topology

Question 16

1 out of 1 points

Wireless media carry ___________________________ signals that represent the binary digits

of data communications using radio or microwave frequencies.

Selected Answer:

Electromagnetic

Question 17

0 out of 1 points

Coaxial cable was traditionally used in cable television and was capable of

transmitting in two directions.

Selected Answer:

True

Question 18

1 out of 1 points

Practical bandwidth of a network is determined by a combination of which factors?

Selected

Answer:

All of the above play a role in determining available

bandwidth.

Question 19

1 out of 1 points

___________________________ permits the transmission of data over longer distances and at

higher bandwidths (data rates) than any other networking media.

Selected Answer:

Optical fiber

Question 20

0 out of 1 points

Controlled access is also known as ______.

Selected Answer:

Scheduled access

Question 21

1 out of 1 points

A(n) _______________________ transmission exists when data signals are transmitted

without an associated clock signal.

Selected Answer:

Asynchronous

Question 22

1 out of 1 points

According to the textbook, throughput usually does not match the specified

bandwidth in physical layer implementations.

Selected Answer:

True

Question 23

1 out of 1 points

___________________________ is throughput minus traffic overhead for establishing

sessions, acknowledgements, and encapsulation.

Selected Answer:

Goodput

Question 24

1 out of 1 points

It is the _______________ that influences the type of network framing and Media Access

Control used.

Selected Answer:

Logical topology

Question 25

1 out of 1 points

_________________________ is a transmission technique in which the amplitude of the

carrier varies in accordance with the signal.

Selected Answer:

Amplitude modulation (AM)

Monday, July 15, 2019 9:34:02 PM EDT

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