Communication Modes in Networking

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Questions and Answers

What is the key characteristic of simplex communication?

Only one device can transmit while the other receives. (correct)

Devices can send and receive but not at the same time.

Both devices can transmit and receive simultaneously.

Communication occurs in both directions simultaneously.

Which situation best describes a half-duplex communication system?

A walkie-talkie where one person talks while the other listens. (correct)

A microphone transmitting sound while speakers receive it.

A video call where all participants can talk at the same time.

A discussion in a meeting where participants can speak simultaneously.

What distinguishes full-duplex communication from half-duplex communication?

Full-duplex is less efficient than half-duplex in channel utilization.

Both devices in full-duplex can transmit and receive at the same time. (correct)

Half-duplex allows data to flow in only one direction.

Full-duplex can only transmit in one direction.

Which of the following is NOT an example of simplex communication?

A telephone conversation between two parties. Signup and view all the answers

Which mode of communication allows the entire channel capacity to be utilized for a single direction at a time?

Half-duplex Signup and view all the answers

How is the capacity of a channel used in full-duplex communication?

Traffic can flow in both directions simultaneously, sharing capacity. Signup and view all the answers

Which of the following systems exemplifies a simplex mode of communication?

A keyboard connected to a computer. Signup and view all the answers

In which communication mode can devices send signals simultaneously without waiting?

Full-duplex Signup and view all the answers

Which factor does not contribute to the measurement of network reliability?

User satisfaction levels Signup and view all the answers

What is a primary attribute of a point-to-point connection?

Provides a dedicated link between two devices Signup and view all the answers

What signifies a multipoint connection in networking?

More than two devices share a single link Signup and view all the answers

Which of these is NOT a goal of network security?

Enhancing network speed Signup and view all the answers

In a multipoint connection, how is the channel capacity typically utilized?

Through both spatial and temporal sharing Signup and view all the answers

What distinguishes a link in a networking context?

A link acts as a pathway for data transfer Signup and view all the answers

Which scenario is an example of a point-to-point connection?

A remote control communicating with a television Signup and view all the answers

What is the term for connections that allow multiple devices to access a single link simultaneously?

Multidrop connections Signup and view all the answers

What is a significant disadvantage of a bus topology?

A fault in the cable can disrupt transmission across the entire network. Signup and view all the answers

Which aspect makes ring topology relatively easy to install?

It only needs reconfiguration when adding or deleting one device. Signup and view all the answers

What role does a repeater play in a ring topology?

It regenerates and passes the signal to the next device. Signup and view all the answers

In a ring topology, what happens if one device fails?

The entire network may become disabled. Signup and view all the answers

What complication arises from adding new devices to a bus topology?

It increases the likelihood of signal loss. Signup and view all the answers

What is one of the key constraints to be considered in ring topology?

Media type and maximum number of devices. Signup and view all the answers

What is a primary characteristic of signal propagation in a ring topology?

Signals circulate continuously until acknowledgment is received. Signup and view all the answers

How does fault isolation work in a ring topology?

The network operator is alerted after a signal is not received. Signup and view all the answers

What was the primary reason for the creation of Advanced Network Services Network (ANSNET)?

To build a high-speed Internet backbone. Signup and view all the answers

Who is credited with inventing the World Wide Web?

Tim Berners-Lee Signup and view all the answers

What characterizes Internet standards according to the provided content?

They undergo a strict procedure before gaining standard status. Signup and view all the answers

Which of the following applications significantly increased the number of Internet users in the past decade?

Voice over IP and video over IP applications Signup and view all the answers

What term describes a working document with no official status in the Internet standard procedure?

Internet draft Signup and view all the answers

What aspect of modern Internet applications has contributed significantly to the time spent on the network by users?

Advancements in multimedia applications Signup and view all the answers

What does peer-to-peer networking primarily focus on?

Decentralized communication systems. Signup and view all the answers

Why did the NSFNET become less viable for Internet traffic over time?

Owing to its inability to scale with traffic demands. Signup and view all the answers

What is the primary responsibility of the Internet Architecture Board (IAB)?

Overseeing the development of the TCP/IP Protocol Suite Signup and view all the answers

Which of the following is NOT a component of the Internet Architecture Board (IAB)?

Internet Protocol Development Group (IPDG) Signup and view all the answers

What role does the Internet Engineering Task Force (IETF) play in the Internet community?

It identifies operational problems and proposes solutions Signup and view all the answers

What distinguishes the Internet Research Task Force (IRTF) from the Internet Engineering Task Force (IETF)?

IRTF primarily addresses long-term research topics Signup and view all the answers

Which area do IETF working groups NOT specifically concentrate on?

Long-term research topics Signup and view all the answers

Who manages the working groups of the Internet Research Task Force (IRTF)?

Internet Research Steering Group (IRSG) Signup and view all the answers

What is one of the functions of the Internet Architecture Board (IAB) in relation to RFCs?

Editorial management of the RFCs Signup and view all the answers

Which task is primarily performed by the Internet Engineering Steering Group (IESG)?

Managing working groups within IETF Signup and view all the answers

What component can be used to address the weakness in ring topology networks?

A dual ring or a switch Signup and view all the answers

Which of the following best describes a Local Area Network (LAN)?

It connects hosts within a limited geographical area. Signup and view all the answers

What is the role of a smart connecting switch in a LAN?

To guide packets to specific destinations without flooding the network. Signup and view all the answers

In which scenario can a LAN accommodate multiple pairs of hosts communicating simultaneously?

When there is no shared source and destination among them. Signup and view all the answers

What typically defines the ownership of a Local Area Network?

It is usually privately owned. Signup and view all the answers

Why has the ring topology become less popular in modern LANs?

Because of the demand for higher-speed LANs. Signup and view all the answers

What limitation does the original design of hosts in a LAN through a common cable impose?

Every host receives every packet sent in the network. Signup and view all the answers

What does each host in a LAN use to uniquely identify itself?

An identifier or address. Signup and view all the answers

Study Notes

Introduction to Data Communications and Networking

Data communication and networking have dramatically changed how businesses and individuals operate, enabling rapid access to information.
Data communication involves the exchange of data between devices over a transmission medium.
Key characteristics of a successful data communication system include delivery, accuracy, timeliness and jitter.
Data communication systems have five components: message, sender, transmission medium, protocol, and receiver.
A protocol is a set of rules that govern the communication between devices.
Data can be represented in different formats including text (represented by bit patterns, like Unicode and ASCII), numbers (converted directly to binary), images (arrays of pixels represented by bit patterns, using color models like RGB or YCM), audio and video.

Data Representation

Text data is represented by bit patterns (e.g., ASCII, Unicode).
Numerical data is represented by binary numbers.
Images are represented by matrices of pixels, each with a bit pattern representing its color or grayscale level.
Different color models (e.g., RGB, YCM) exist.
Audio data is continuous, unlike other forms like text or images, represented as a continuous signal.
Video is a combination of images, each a discrete entity, arranged to create the illusion of motion.

Data Flow

Communication between two devices can be simplex, half-duplex or full-duplex.
Simplex communication is unidirectional (e.g., keyboards and traditional monitors).
Half-duplex communication allows communication in both directions, but only one way at a time (e.g., walkie talkies).
Full-duplex communication allows communication in both directions simultaneously (e.g., telephone calls).

Networks

A network is an interconnection of devices that can communicate.
Types of connections include point-to-point (dedicated link between two devices) and multipoint (multiple devices sharing a single link).
Network criteria include performance, reliability, and security.
Network topologies include mesh (every device connected to every other), star (devices connected to a central controller), bus (devices connected to a common backbone) and ring (devices connected in a closed loop).

Network Types

Local Area Networks (LANs) connect devices in a limited area (e.g., office, building).
Wide Area Networks (WANs) connect devices over a wide geographical area (e.g., cities, countries).
Networks can be interconnected to form an internetwork or internet.
Switching is used to connect networks (circuit-switching and packet-switching).
Internet Standards are thoroughly tested specifications used in the Internet.

Internet History

The Internet evolved from early communication networks (telegraphs, telephones),
to packet-switching networks (like ARPANET, and CSNET),
to NSFNET,
and finally to the global internet we know today, using TCP/IP protocol.

Internet Today

The Internet today is characterized by rapid growth in infrastructure and applications.
Key applications include World Wide Web (WWW), multimedia (voice, video, etc).
Peer-to-peer applications (e.g., content sharing).
Internet standards and administration are managed (e.g., through ISOC, IAB, IETF).
Accessing the Internet through dial-up, DSL, cable and wireless connections.

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Description

Test your knowledge on the different modes of communication in networking, including simplex, half-duplex, and full-duplex systems. This quiz explores key characteristics, examples, and the effectiveness of each communication type. Perfect for students and professionals looking to solidify their understanding of network communication.