Network + Study Quiz (Chapter 3)
This is a quiz a composed from chapter 3 of Mike Meyer's network book.
Questions and Answers
- 1.
Which of these is NOT a historical network topology
- A.
Bus
- B.
Ring
- C.
Star
- D.
Mesh
Correct Answer
D. MeshExplanation
A mesh network topology is a type of network where each device is connected to every other device in the network. This type of topology is commonly used in modern computer networks, but it is not a historical network topology. In the past, network topologies such as bus, ring, and star were more commonly used. These topologies have a different structure and method of connecting devices compared to a mesh topology.Rate this question:
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- 2.
Which of the following are Modern topologies? (select three)
- A.
Hybrid
- B.
Point-to-multipoint
- C.
Point-to-point
- D.
Star
Correct Answer(s)
A. Hybrid
B. Point-to-multipoint
C. Point-to-pointExplanation
The correct answer is hybrid, point-to-multipoint, and point-to-point. These three options are considered modern topologies in computer networks. A hybrid topology combines two or more different topologies, such as a mix of star and bus or ring topologies. Point-to-multipoint refers to a network where a single device can communicate with multiple devices simultaneously. Point-to-point is a direct connection between two devices, allowing for efficient and secure communication. These modern topologies offer flexibility, scalability, and improved performance in network communication.Rate this question:
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- 3.
Which of the following describes a bus topology?
- A.
Connects via a single linear piece of cable
- B.
Connects via a central ring of cable
- C.
Offers fault tolerance
- D.
Uses a central connection
Correct Answer
A. Connects via a single linear piece of cableExplanation
A bus topology is a network configuration where all devices are connected to a single linear piece of cable, known as the bus. This cable acts as a shared communication medium, allowing data to be transmitted between devices. In this topology, each device on the network can send and receive data, and the data travels along the bus to reach its destination. This configuration does not involve a central ring of cable or a central connection. Additionally, bus topology does not inherently offer fault tolerance, as a single point of failure in the bus cable can disrupt the entire network.Rate this question:
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- 4.
True or false? With fault tolerance, if one cable breaks, all other computers could still communicate
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Fault tolerance refers to the ability of a system to continue functioning properly even in the presence of faults or failures. In the given context, if one cable breaks, it implies that there are multiple cables connecting the computers. With fault tolerance, the system is designed in such a way that the failure of one cable does not disrupt communication between the computers. Therefore, even if one cable breaks, the other cables ensure that the computers can still communicate, making the statement "True" in this case.Rate this question:
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- 5.
True or false? A segment is a bus shrunken into a box
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
A segment is not a bus shrunken into a box. A segment refers to a specific portion or section of a bus route, whereas a bus is a larger vehicle used for public transportation. Therefore, the statement "A segment is a bus shrunken into a box" is false.Rate this question:
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- 6.
What is the difference between physical topology and signaling topology?
- A.
Physically describes how signals travel electronically, signaling describes how cables look
- B.
Physically describes how cables look, signaling describes how signals travel electronically
Correct Answer
B. Physically describes how cables look, signaling describes how signals travel electronicallyExplanation
The physical topology refers to the physical layout of cables and devices in a network, describing how cables are connected and the overall structure of the network. On the other hand, the signaling topology refers to how signals or data travel electronically through the network, describing the path that the signals take from one device to another. Therefore, the correct answer is that physical topology describes how cables look, while signaling topology describes how signals travel electronically.Rate this question:
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- 7.
Which two hybrid topologies were the only two to gain any popularity? (select two)
- A.
Star-ring
- B.
Ring-bus
- C.
Star-bus
- D.
Bus-ring
Correct Answer(s)
A. Star-ring
C. Star-busExplanation
Star-ring and star-bus are the only two hybrid topologies that gained popularity. A star-ring topology combines the features of a star and ring topology, where each device is connected to a central hub in a star configuration, and the hubs are connected in a ring configuration. A star-bus topology combines the features of a star and bus topology, where each device is connected to a central hub in a star configuration, and the hubs are connected in a bus configuration. These hybrid topologies offer advantages such as fault tolerance and scalability, which contributed to their popularity.Rate this question:
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- 8.
What is the formula used to determine the number of connectors in a mesh topology
- A.
Y(y+1)/2
- B.
Y(y-1)/2
- C.
Y(y/1)2
- D.
2/y(y-1)
Correct Answer
B. Y(y-1)/2Explanation
The formula used to determine the number of connectors in a mesh topology is y(y-1)/2. This formula is derived from the fact that each node in a mesh topology is connected to every other node except itself. Therefore, the total number of connections can be calculated by multiplying the number of nodes (y) by the number of nodes minus one (y-1), and then dividing the result by 2 to avoid counting each connection twice.Rate this question:
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- 9.
Which is true about a Point-to-Multipoint topology?
- A.
A central device is not needed for members of a network to converse
- B.
A central device is needed for members of a network to converse
- C.
It is implemented in both wired and wireless networks
- D.
Two computers connect directly
Correct Answer
B. A central device is needed for members of a network to converseExplanation
In a Point-to-Multipoint topology, a central device is needed for members of a network to converse. This means that all communication between the members of the network must go through the central device. This topology is commonly used in situations where one central device needs to communicate with multiple remote devices or endpoints. It allows for efficient communication and management of the network, as the central device can control and coordinate the flow of information between the different members. This topology can be implemented in both wired and wireless networks, depending on the specific requirements and infrastructure.Rate this question:
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- 10.
Which type of cable shields data transmissions from electronic magnetic interference (EMI)
- A.
Twisted-pair
- B.
Fiber-optic
- C.
Coaxial (coax)
Correct Answer
C. Coaxial (coax)Explanation
Coaxial (coax) cable shields data transmissions from electronic magnetic interference (EMI) because it consists of an inner conductor surrounded by a layer of insulation, a metallic shield, and an outer insulating layer. The metallic shield acts as a barrier that prevents EMI from interfering with the data signals traveling through the cable. This shielding design ensures that the data transmissions remain free from any electromagnetic interference, making coaxial cable an effective choice for applications that require reliable and interference-free data transmission.Rate this question:
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- 11.
For early bus topologies, BNC connectors were most popular for which type of cable?
- A.
Coaxial
- B.
Twisted-pair
- C.
Fiber-optic
Correct Answer
A. CoaxialExplanation
BNC connectors were most popular for coaxial cables in early bus topologies. Coaxial cables consist of a central conductor surrounded by an insulating layer, a metallic shield, and an outer insulating layer. BNC connectors were commonly used to connect coaxial cables because they provided a secure and reliable connection. Coaxial cables were widely used in early bus topologies to transmit data signals between devices in a linear fashion, with each device connected to the main cable.Rate this question:
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- 12.
CAT 5e cables are rated to handle 100mhz, but are capable of handling...?
- A.
10mbps
- B.
1000mbps
- C.
100mbps
- D.
10gbps
Correct Answer
B. 1000mbpsExplanation
CAT 5e cables are rated to handle 100MHz, which refers to the maximum frequency at which the cable can transmit data without significant loss or interference. However, the cable's actual data transmission speed, measured in megabits per second (Mbps), can be higher than the cable's frequency rating. In this case, the correct answer is 1000Mbps, indicating that CAT 5e cables are capable of handling data transmission speeds up to 1000 megabits per second.Rate this question:
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- 13.
The foru componenets of a fiber-optic cable are glass fiber (core), cladding, buffer material, and ______.
Correct Answer
insulating jacket
insulatorExplanation
The four components of a fiber-optic cable are glass fiber (core), cladding, buffer material, and insulating jacket. The insulating jacket is a protective layer that surrounds the entire cable, providing insulation and protection against external elements. It helps to prevent damage to the cable and ensures the integrity of the signal transmission through the fiber-optic cable. An insulator, on the other hand, is a material that prevents the flow of electric current. While both terms are related to insulation, an insulating jacket specifically refers to the protective layer in a fiber-optic cable, making it the correct answer.Rate this question:
- 14.
Multimode cables use _______.
Correct Answer
LEDsExplanation
Multimode cables use LEDs (Light Emitting Diodes) as the light source for transmitting data. LEDs are commonly used in multimode cables because they are cost-effective, have a longer lifespan, and can transmit data over short distances efficiently. The LEDs emit light signals into the cable, which then travels through the cable's core to transmit data. This allows for the transmission of multiple signals simultaneously, making multimode cables suitable for high-speed data communication in local area networks (LANs) and other short-range applications.Rate this question:
- 15.
Single-mode cables use _______.
Correct Answer
lasersExplanation
Single-mode cables use lasers as the light source for transmitting data. Unlike multi-mode cables that use LEDs, lasers in single-mode cables emit a narrow beam of light that can travel longer distances with less signal loss. This makes single-mode cables ideal for long-distance communication where high bandwidth and low attenuation are crucial. The focused and concentrated light produced by lasers enables single-mode cables to achieve higher data transmission rates and support higher bandwidth applications.Rate this question:
- 16.
True or false? RS-232 is the recommended standard (RS) for serial communication
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
RS-232 is indeed the recommended standard for serial communication. It is a widely used standard that defines the electrical and mechanical characteristics of the interface between data terminal equipment (DTE) and data communication equipment (DCE). RS-232 provides a common ground for communication between devices such as computers, modems, and printers. It specifies the voltage levels, signal timing, and data format, making it a reliable and widely supported standard for serial communication.Rate this question:
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- 17.
Which fire rating provides no significant fire protection?
- A.
Plenum
- B.
Polyvinyl Chloride (PVC)
- C.
Riser
Correct Answer
B. Polyvinyl Chloride (PVC)Explanation
Polyvinyl Chloride (PVC) is not a fire rating, but rather a type of material commonly used in construction. It is not known for providing significant fire protection and can actually contribute to the spread of fire. PVC is a highly flammable material that releases toxic gases when burned, making it a poor choice for fire-resistant applications. Therefore, the correct answer is Polyvinyl Chloride (PVC).Rate this question:
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Mar 22, 2023Quiz Edited by
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Apr 06, 2010Quiz Created by
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