Data Communication and Networks Overview

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Questions and Answers

What are the two primary functions of a network device?

Forwarding data packets and allowing multiple devices to use the same internet connection (correct)

Monitoring and filtering network traffic based on security policies

Modulating and demodulating analog carrier signals

Providing dedicated point-to-point links between devices

What is the main purpose of a modem?

To establish a fully connected mesh network topology

To provide dedicated point-to-point links between devices

To monitor and filter network traffic

To modulate and demodulate analog carrier signals for encoding and decoding digital information (correct)

What is the primary function of a firewall?

To modulate and demodulate analog carrier signals

To allow multiple devices to use the same internet connection

To monitor and filter incoming and outgoing network traffic based on security policies (correct)

To manage traffic between networks by forwarding data packets

Which type of network topology has every device connected to a central controller?

Star Signup and view all the answers

What is the main advantage of a mesh network topology?

Less traffic, robust, secure, easy to maintain Signup and view all the answers

What is the main disadvantage of a mesh network topology?

Requires more expensive resources (cables and ports) Signup and view all the answers

What type of data transmission involves data flowing in one direction only?

Simplex Signup and view all the answers

Which device creates a single network from multiple network segments?

Bridge Signup and view all the answers

What is a device that connects two or more packet-switched networks or subnetworks?

Router Signup and view all the answers

Which network device allows devices to communicate by exchanging data packets?

Switch Signup and view all the answers

What is an example of a full-duplex data transmission?

Video Signup and view all the answers

Which networking hardware device is responsible for allowing hardware on a computer network to communicate with each other?

NIC Signup and view all the answers

What is a key advantage of a bus topology?

Ease of installation Signup and view all the answers

In a bus topology, what is the function of a tap?

It connects the device to the main cable Signup and view all the answers

What is a major disadvantage of a bus topology?

A fault or break in the bus cable stops all transmission Signup and view all the answers

In a ring topology, how is data transmitted?

Data is passed along the ring from device to device Signup and view all the answers

What is a key advantage of a tree topology?

Point-to-point wiring for individual segments Signup and view all the answers

What is a disadvantage of a tree topology?

If the backbone line breaks, the entire segment goes down Signup and view all the answers

What is the main disadvantage of a hybrid network topology?

It is more difficult to configure and wire than other topologies. Signup and view all the answers

Which of the following is NOT a category of computer network?

Global Area Network (GAN) Signup and view all the answers

What is the primary characteristic that distinguishes a LAN from a WAN?

A LAN interconnects computers within a limited area, while a WAN covers a larger geographic distance. Signup and view all the answers

What is the primary function of a Campus Area Network (CAN)?

To interconnect multiple LANs within a limited geographic area. Signup and view all the answers

In the given example, how many computers are connected to the hub in the closet?

12 Signup and view all the answers

Which of the following statements about WLANs is true?

A WLAN links devices using wireless communication within a limited area. Signup and view all the answers

What is the primary characteristic that distinguishes a Metropolitan Area Network (MAN) from a Local Area Network (LAN)?

A MAN spans across multiple buildings or locations, while a LAN is typically confined to a single building. Signup and view all the answers

Which of the following best describes the purpose of a Wide Area Network (WAN)?

To connect offices, data centers, cloud applications, and cloud storage across a wide geographic area. Signup and view all the answers

What is the primary characteristic that distinguishes a Personal Area Network (PAN) from other network types?

A PAN is designed to connect devices within a user's immediate vicinity, typically ranging from a few centimeters to a few meters. Signup and view all the answers

Which of the following is NOT a characteristic of a Wide Area Network (WAN)?

Facilitates communication between devices within a small area, such as a few meters. Signup and view all the answers

What type of network would be most suitable for interconnecting multiple Local Area Networks (LANs) within a city?

Metropolitan Area Network (MAN) Signup and view all the answers

Which of the following statements about WANs is correct?

WANs can be classified into switched WANs and point-to-point WANs. Signup and view all the answers

Study Notes

Functions of network devices include managing traffic between networks by forwarding data packets and allowing multiple devices to use the same Internet connection.
Modem is a network device that modulates and demodulates analog carrier signals for encoding and decoding digital information.
A firewall is a network security device that monitors and filters incoming and outgoing network traffic based on established security policies.
Different types of connections include point-to-point and multipoint, with various physical topologies like tree and mesh.
Network devices such as switches, bridges, and routers facilitate communication and interaction among hardware on a computer network.
Router connects two or more packet-switched networks or subnetworks and does not have direct traffic and link between devices.
Common network topologies include bus, ring, and tree, each with its advantages and disadvantages in terms of installation and fault tolerance.
Categories of networks include LAN, WLAN, CAN, MAN, WAN, and PAN, each serving different geographic areas and connectivity needs.

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Description

Explore the fundamentals of data communication and networks, including data flow, simplex, half-duplex, full-duplex, and network devices. Learn about message delivery options and data representation through text, numbers, images, audio, and video. Watch related videos for a comprehensive understanding of the topic.