# Network+ Guide To Networks 4/E Ch. 3

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Network+ Guide to Networks Ch. 3 quiz

• 1.

### A byte is:

• A.

7 bits

• B.

9 bits

• C.

5 bits

• D.

9.5 bits

• E.

8 bits

E. 8 bits
Explanation
A byte is a unit of digital information that consists of 8 bits. Each bit can represent either a 0 or a 1, and when combined, the 8 bits can represent a total of 256 different values. This is the most common and standard size for a byte in computer systems, and it is used to store and transmit data in various formats and protocols.

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• 2.

### ___________ is the measure of a signals strength. (lowercase)

amplitude
Explanation
The amplitude of a signal refers to the maximum extent of its variation from its average value. It represents the strength or intensity of the signal. A higher amplitude indicates a stronger signal, while a lower amplitude indicates a weaker signal. Therefore, the amplitude is a measure of the signal's strength.

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• 3.

### Data can travel in one direction and only in one direction. This is called:

• A.

Half-Duplex

• B.

Duplexing

• C.

SuperPlexing

• D.

Full-Duplex

• E.

Simplex

E. Simplex
Explanation
Simplex is the correct answer because it refers to a communication mode where data can only travel in one direction. In simplex communication, there is a unidirectional flow of information, meaning that data can only be transmitted from one device to another without any feedback or response. This mode is commonly used in situations where only one-way communication is required, such as television or radio broadcasting. Unlike other options like half-duplex or full-duplex, simplex does not allow for two-way communication or simultaneous transmission in both directions.

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• 4.

### Data can travel in both directions but only in one direction at a time. This is called:

• A.

Duplexing

• B.

Superplexing

• C.

Half-Duplex

• D.

Full-Duplex

• E.

Simplex

C. Half-Duplex
Explanation
In data communication, half-duplex refers to the mode where data can be transmitted in both directions, but only one direction at a time. This means that while one device is sending data, the other device can only receive, and vice versa. It is like a walkie-talkie system where users take turns speaking and listening. This mode is commonly used in situations where simultaneous communication is not required or when the resources for full-duplex communication are limited.

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• 5.

### Data that can travel in both directions and at the same time is:

• A.

Full-Duplex

• B.

Simplex

• C.

Half-Duplex

• D.

Duplexing

• E.

Superplexing

A. Full-Duplex
D. Duplexing
Explanation
Full-Duplex and Duplexing are the correct answers because they both refer to the ability of data to travel in both directions simultaneously. Full-Duplex specifically refers to a communication system where data can be transmitted and received at the same time, while Duplexing is a general term that encompasses any method or technology that allows for bidirectional data transmission. Simplex, Half-Duplex, and Superplexing do not fit the description of data traveling in both directions simultaneously.

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• 6.

### __________ is a form of transmission that allows multiple signals to travel across one medium simultaneously. (lowercase)

multiplexing
Explanation
Multiplexing is a method of transmitting multiple signals simultaneously over a single medium. It combines multiple signals into a single signal and then separates them at the receiving end. This allows for more efficient use of the transmission medium and enables multiple users to share the same communication channel. Multiplexing is commonly used in telecommunications, networking, and broadcasting to increase the capacity and efficiency of data transmission.

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• 7.

### ________ is the extent to which a signal is weakened while traveling distance. (lowercase)

attenuation
Explanation
Attenuation refers to the extent to which a signal weakens while traveling a distance. It is a term commonly used in telecommunications and signal processing to describe the loss of signal strength over a transmission medium or through a system. Attenuation can occur due to various factors such as distance, interference, or the characteristics of the medium itself. It is an important concept to understand in order to ensure the quality and reliability of signal transmission.

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• 8.

### A ______ amplifies an analog signal. (lowercase)

amplifier
Explanation
An amplifier is a device that increases the amplitude of an analog signal. It takes in a weak signal and boosts it to a higher level without distorting the original waveform. Amplifiers are commonly used in audio systems, telecommunications, and various electronic devices to enhance signals for better transmission or to drive speakers or headphones with sufficient power. They play a crucial role in amplifying signals accurately and efficiently, allowing for clearer and louder sound reproduction or improved signal strength in various applications.

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• 9.

### A ________ demodulates analog signals into digital signals at the receiving end. (lowercase)

demodulator
Explanation
A demodulator is a device that converts analog signals into digital signals at the receiving end. It takes the modulated analog signal, which has been encoded for transmission, and extracts the original digital information from it. This process is essential for communication systems that transmit analog signals over long distances, as it allows for accurate and reliable transmission of data.

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• 10.

### A _______ is also known as a(n); modulator/demodulator. (lowercase)

modem
Explanation
A modem is a device that modulates and demodulates signals, allowing computers to transmit data over telephone lines. It converts digital signals from a computer into analog signals that can be transmitted over a telephone line, and then converts the analog signals back into digital signals at the receiving end. Modems are commonly used to connect to the internet, as they enable communication between a computer and an internet service provider.

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• 11.

### A _________ is a piece of hardware that enables networks or segments running on different media to interconnect and exchange signals. (lowercase

media converter
Explanation
A media converter is a hardware device that allows networks or segments that use different media to connect and exchange signals. It acts as a bridge, converting signals from one media type to another, such as from fiber optic to copper or vice versa. This enables seamless communication and integration between different types of networks or segments, enhancing connectivity and interoperability.

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• 12.

### CAT 5, CAT 7, CAT 6, and CAT 5e all belong to:

• A.

802.3

• B.

802.11

• C.

802.8

• D.

802.2

• E.

802.5

A. 802.3
Explanation
CAT 5, CAT 7, CAT 6, and CAT 5e are all types of Ethernet cables used for network connections. The correct answer, 802.3, refers to the IEEE standard for Ethernet. This standard defines the physical and data link layer specifications for Ethernet networks, including the different categories of cables. Therefore, CAT 5, CAT 7, CAT 6, and CAT 5e all belong to the 802.3 standard.

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• 13.

### 802.8 is (lowercase)

fiber optic
Explanation
The correct answer is "fiber optic" because 802.8 refers to the IEEE standard for Fiber Optic Technical Advisory Group (FO-TAG). The lowercase mention suggests that it is referring to a specific type or category, and in this case, it is fiber optic technology.

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• 14.

### 802.5 is (lowercase)

token ring
Explanation
802.5 refers to the IEEE standard for Token Ring networks. Token Ring is a local area network (LAN) technology where computers are connected in a ring topology. In this network, a special token is passed around the ring, allowing each computer to take turns transmitting data. The token ensures fair access to the network and helps prevent collisions. Therefore, the correct answer for this question is "token ring."

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• 15.

### 802.2 is (lowercase)

Explanation
802.2 refers to the Logical Link Control (LLC) sublayer in the OSI model. The LLC sublayer is responsible for managing communication between network devices, providing flow control, error checking, and addressing. It ensures that data is transferred reliably over the physical layer of the network. Therefore, the correct answer is logical link control.

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• 16.

### 802.11 is (lowercase)

wireless
Explanation
The term "802.11" refers to a set of standards for wireless local area networks (WLANs), commonly known as Wi-Fi. Therefore, the correct answer "wireless" accurately describes the nature of 802.11 technology.

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• 17.

### MMF and SMF relate to what cable type: (lowercase)

fiber optic
Explanation
MMF and SMF are abbreviations used in the field of fiber optics to refer to different types of fiber optic cables. MMF stands for Multimode Fiber, which is a type of fiber optic cable that allows multiple modes of light to propagate through it simultaneously. SMF stands for Single Mode Fiber, which is a type of fiber optic cable that allows only a single mode of light to propagate through it. Therefore, the correct answer is "fiber optic" as both MMF and SMF are types of fiber optic cables.

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• 18.

### I bounce light signals back into the core of a fiber optic cable... What am I? (lowercase)

Explanation
The cladding is the material that surrounds the core of a fiber optic cable. It has a lower refractive index than the core, which allows it to bounce light signals back into the core, preventing them from escaping. This phenomenon, known as total internal reflection, is what enables the transmission of light signals through the fiber optic cable. Therefore, the correct answer is cladding.

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• 19.

### Which of the following transmission techniques is capable of the greatest throughput?

• A.

Simplex

• B.

Half-Duplex

• C.

Full-Duplex

• D.

Duplexing

• E.

None are, they are all equal.

C. Full-Duplex
D. Duplexing
Explanation
Full-duplex and duplexing are both transmission techniques that allow for simultaneous two-way communication. Full-duplex enables data to be transmitted and received simultaneously, while duplexing refers to the process of using both directions of a communication medium. These techniques have the greatest throughput because they maximize the use of the transmission medium, allowing for efficient and fast data transfer. Simplex and half-duplex, on the other hand, only allow for one-way or alternating two-way communication, respectively, which limits the throughput compared to full-duplex and duplexing.

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• 20.

### What cable will suffer the most crosstalk?

• A.

CAT 5

• B.

CAT 7

• C.

CAT 3

• D.

STP CAT 5e

• E.

CAT 6e

C. CAT 3
Explanation
CAT 3 cable will suffer the most crosstalk because it is an older and less advanced cable compared to the others listed. Crosstalk refers to the interference between adjacent cables, and CAT 3 cables have less shielding and insulation to prevent this interference. CAT 5, CAT 7, STP CAT 5e, and CAT 6e cables are all newer and have better shielding and insulation, making them less susceptible to crosstalk.

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• 21.

### To transmit and receive signals to and from multiple nodes in a three-story house, what type of antenna should an access point use? (lowercase)

omnidirectional
Explanation
An omnidirectional antenna is the most suitable choice for transmitting and receiving signals to and from multiple nodes in a three-story house. This type of antenna radiates signals in all directions, providing a 360-degree coverage pattern. It ensures that the signals can reach devices located on different floors and in various directions within the house, without the need for constant adjustment or repositioning of the antenna. This makes it ideal for creating a reliable and consistent wireless network throughout the entire three-story house.

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• 22.

### What is the maximum amount you should untwist twisted pair wires before insterting them into connectors?

• A.

1/4 Inch

• B.

1 Inch

• C.

2 Inches

• D.

1/2 inch

• E.

1 1/2 Inch

D. 1/2 inch
Explanation
Twisted pair wires are commonly used in networking and telecommunications to reduce electromagnetic interference. Untwisting the wires too much can lead to increased interference and signal degradation. Therefore, it is recommended to untwist the twisted pair wires by a maximum of 1/2 inch before inserting them into connectors. This allows for proper termination while minimizing the risk of interference.

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• Current Version
• Mar 21, 2023
Quiz Edited by
ProProfs Editorial Team
• Sep 28, 2008
Quiz Created by
Triz

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