Computer Networks and Internet Chapter 4

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Questions and Answers

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

Type of cables used

Network topology

Geographical span (correct)

Number of devices connected

Which network topology uses a central device to connect all network devices?

Star Topology (correct)

Mesh Topology

Bus Topology

Ring Topology

What is a common network failure scenario in Bus Topology?

If the bus line fails, the network cannot function (correct)

If a device fails, the network cannot function

If a device is powered off, the network cannot function

If a device is disconnected, the network cannot function

What is the primary function of a WAN?

To connect multiple LANs together Signup and view all the answers

What is the physical arrangement of devices in a network referred to as?

Network Topology Signup and view all the answers

What is a common consequence of a central device failure in Star Topology?

The network cannot function Signup and view all the answers

What is the primary function of a modem in a computer system?

To convert digital signals to analog and vice versa Signup and view all the answers

What is the purpose of a special filter installed on a subscriber's telephone line in ADSL technology?

To allow both ADSL and regular voice services to be used simultaneously Signup and view all the answers

What is the typical ratio of upstream to downstream speed in ADSL connections?

1:8 Signup and view all the answers

What is the term used to describe the amount of information that can be transmitted over a network in a given amount of time?

Network bandwidth Signup and view all the answers

What is the term used to describe the speed of sending data to other devices on a network?

Upstream Signup and view all the answers

What is the term used to describe the speed of downloading data from a network?

Downstream Signup and view all the answers

What is the primary focus of this chapter?

Exploring the Internet and its applications Signup and view all the answers

What is the main goal of this chapter for students?

To understand the fundamental concepts of computer networks and the Internet Signup and view all the answers

What is one of the intended learning outcomes of this chapter for students?

To define the main terminologies, topologies, and network architectures Signup and view all the answers

What type of communication channels are described in this chapter?

Both physical and wireless communication channels Signup and view all the answers

What is one of the types of physical transmission media discussed in this chapter?

Twisted-pair cable Signup and view all the answers

Which of the following books is NOT mentioned as a reference for further reading?

Computer Networks by Tanenbaum Signup and view all the answers

What is the unit of measurement for the Internet connection speed of 8 Mbps?

Mbps Signup and view all the answers

What happens to the network in a Bus topology if the shared line fails?

The whole network will fail Signup and view all the answers

What is the function of a Switch in a network?

To determine the destination of data packets and forward them appropriately Signup and view all the answers

What type of cable is more expensive than fiber-optics cable?

Twisted pair cable Signup and view all the answers

What is the primary function of a server in a Client-Server architecture?

To receive clients' requests and respond accordingly Signup and view all the answers

What is the purpose of a modem in a network?

To convert digital signals to analog signals Signup and view all the answers

What is the maximum number of computers that can be efficiently connected in a Peer-to-Peer architecture?

10 Signup and view all the answers

What is the classification of the IP address 192.186.100.0?

Valid IP address Signup and view all the answers

What is the primary purpose of protocols in a network?

To govern correct communication between different parties Signup and view all the answers

What is the term for the physical path through which data is transmitted in a network?

Transmission Medium Signup and view all the answers

What is the primary advantage of a Peer-to-Peer architecture?

It works well with few devices connected to each other Signup and view all the answers

What is the term for the messages sent between devices in a network?

Data Signup and view all the answers

Study Notes

LAN vs. WAN

The primary characteristic that distinguishes a LAN from a WAN is geographic scope. LANs are typically confined to a single building or location, while WANs connect devices across wider geographical areas.

Network Topologies

Star topology uses a central device (hub or switch) to connect all network devices.
Bus topology uses a shared line (bus) for communication between all devices. A common failure scenario is a break in the shared line, leading to complete network disruption.

Function of WAN

The primary function of a WAN is to connect different LANs or networks over long distances.

Physical Arrangement of Devices

The physical arrangement of devices in a network is referred to as network topology.

Central Device Failure in Star Topology

A central device failure in Star topology can result in the disconnection of all devices connected to it.

Modem Function

The primary function of a modem in a computer system is to convert digital data to analog signals (modulation) and vice versa (demodulation) for transmission over telephone lines.

ADSL Technology

A special filter installed on a subscriber's telephone line in ADSL technology is used to separate the voice and data signals.
The typical upstream to downstream speed ratio in ADSL connections is asymmetrical, favoring downstream speeds for faster downloads.

Network Speed and Bandwidth

Bandwidth describes the amount of information transmitted over a network within a specific timeframe.
Throughput refers to the speed of sending data to other network devices.
Download speed refers to the speed of receiving data from a network.

Chapter Focus and Learning Outcomes

The chapter focuses on network fundamentals and concepts, encompassing basic definitions, network topologies, and communication technologies.
The main goal for students is to develop an understanding of how networks function and their key components.
One learning outcome includes gaining knowledge of different physical transmission media used in networks.

Communication Channels and Physical Transmission Media

The chapter explores various communication channels, including wired and wireless.
One type of physical transmission media discussed is fiber-optic cable.

Reference Books

The chapter does not mention any specific reference books for further reading.

Internet Connection Speed Unit

The unit of measurement for the Internet connection speed of 8 Mbps is Megabits per second.

Bus Topology Failure

If the shared line in a Bus topology fails, the entire network becomes disconnected as data cannot be transmitted.

Switch Function in a Network

A Switch in a network functions as a layer 2 device that forwards data packets to their intended destination based on MAC addresses.

Cable Costs

Fiber-optic cable is more expensive than other types of cabling, like coaxial or twisted-pair.

Server Function in Client-Server Architecture

In Client-Server architecture, the server's primary function is to provide resources and services to the client devices connected to it.

Modem Function in a Network

In a network, a modem is used to convert digital data to analog signals for transmission over physical lines.

Peer-to-Peer Architecture Limit

The maximum number of computers efficiently connected in a Peer-to-Peer architecture is limited, depending on the network infrastructure and resources. However, a large number of computers can be connected, particularly with the use of modern technologies.

IP Address Classification

The IP address 192.186.100.0 is classified as a Class C IP address, which typically represents a private network.

Protocol Purpose in a Network

Protocols in a network establish a common language for communication, ensuring that devices understand each other's messages and can exchange information effectively.

Transmission Path

The physical path through which data is transmitted in a network is called the transmission medium.

Peer-to-Peer Advantage

The primary advantage of a Peer-to-Peer architecture is that it does not require a dedicated server, reducing overall network costs and complexity.

Network Messages

The messages sent between devices in a network are called data packets.

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Description

Test your understanding of computer networks and the internet, including networking principles, terminologies, topologies, and architectures. This quiz covers the basics of how computer networks work and their applications.