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Fundamentals of Computer Networking

Exploring the fundamentals of computer networking, this overview covers the exchange of information through various networks, including LANs, WANs, and PANs. It delves into communication protocols, ensuring secure data transmission, and the importance of HCI in creating user-friendly interfaces. Additionally, it touches on the academic discipline of communication studies and its evolution from ancient rhetoric to modern digital communication.

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1

The core function of ______ is to allow computers and devices to share information.

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Computer networking

2

Data on a network can be sent as ______, ______, or ______ signals.

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electrical optical radio

3

Characteristics of LANs

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Local Area Networks: small geographic area, connects few devices, can be wired (Ethernet) or wireless (Wi-Fi).

4

Function of WANs

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Wide Area Networks: cover large distances, connect across cities/countries/globally, use routers/switches for data traffic.

5

Difference between PAN, CAN, and MAN

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Personal Area Networks: individual workspace. Campus Area Networks: larger than LANs, smaller than MANs. Metropolitan Area Networks: cover city/metropolitan area.

6

______ are sets of rules for data exchange between devices, including message formatting and error handling.

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Communication protocols

7

In ______ communication, data flows in both directions but not at the same time.

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half-duplex

8

______ communication supports data transmission simultaneously in two directions.

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Full-duplex

9

To secure data and prevent unauthorized access, ______ is used to encrypt the data.

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Cryptography

10

The ______ in communication protocols ensures that the sender and receiver are in sync during data exchange.

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synchronization

11

HCI interface components

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Includes both hardware (e.g., mouse, keyboard, monitor) and software (OS, applications).

12

Evolution of user interfaces

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Transitioned from command-line inputs to graphical interfaces with icons, windows, and pointing devices.

13

Objective of interface design in HCI

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To make technology accessible and intuitive, enhancing user experience and productivity.

14

______ studies is a field that explores how messages are processed and their impact in different scenarios.

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Communication

15

In ______ studies, the analysis of signs and symbols is known as ______.

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communication semiotics

16

Researchers in ______ studies examine various ______ and how communication shapes societal roles.

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communication models

17

The field delves into the mental foundations of how messages affect both ______ and ______.

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individuals groups

18

Insights into the development of ______ technologies and their effects on society are outcomes of ______ studies.

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communication communication

19

Understanding the key tenets of successful message exchange is a goal of ______ studies.

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communication

20

Ancient roots of communication study

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Originated with Greek philosophers like Plato and Aristotle analyzing rhetoric and public discourse.

21

Forms of communication in contemporary studies

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Includes interpersonal, intrapersonal, verbal, non-verbal, and mass communication.

22

Specialized areas in communication studies

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Covers organizational, marketing, political, intercultural, and health communication.

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Fundamentals of Computer Networking

Computer networking is the foundational technology that enables computers and other devices to exchange information. This exchange is made possible through a network that connects devices using various transmission media. Key elements in this network include transmitters, which send data, and receivers, which accept it. For instance, a personal computer may use a modem to transmit data to a server via the public telephone network. The server then receives the data using its own modem. Data travels across the network in the form of electrical, optical, or radio signals, and the channels can be either analog or digital. The efficiency of these channels is determined by their bandwidth, which is the amount of data that can be transmitted per unit of time, and latency, the time it takes for data to travel from source to destination. These factors are critical in determining the performance of a network.
Network engineer checks equipment in server room with black rack cabinets, LED lights and technical floor for cable management.

Classification of Computer Networks

Computer networks are categorized based on their geographic scope and purpose. Local Area Networks (LANs) are confined to a small area like a building or campus and are typically used for connecting a small number of devices. LANs can be wired, such as Ethernet networks, or wireless, like Wi-Fi networks. Wide Area Networks (WANs) span much larger distances and can connect devices across cities, countries, or even globally, with the internet being the largest WAN. Intermediate nodes such as routers and switches are often required to manage the data traffic in WANs. Other network types include Personal Area Networks (PANs), which connect devices within an individual's workspace; Campus Area Networks (CANs), which are larger than LANs but smaller than MANs; and Metropolitan Area Networks (MANs), which cover a city or metropolitan area. Each network type is designed to address specific connectivity requirements and scales.

Communication Protocols and Secure Data Transmission

Communication protocols are the agreed-upon set of rules that govern data exchange between devices. These protocols define how messages are formatted, error handling procedures, and the synchronization of communication, ensuring that the sender and receiver are coordinated in the data exchange process. Communication can be simplex, allowing data to flow in only one direction; half-duplex, where data can flow in both directions but not simultaneously; or full-duplex, which supports simultaneous two-way data transmission. Security is paramount in communication to prevent unauthorized access and data breaches. Cryptography is commonly used to encrypt data, making it unreadable to anyone except the intended recipient with the correct decryption key.

Human-Computer Interaction (HCI)

Human-computer interaction (HCI) is the study of how people interact with computers and how to design computer systems that are user-friendly. The interface between the user and the computer includes both hardware (input and output devices like the mouse, keyboard, and monitor) and software components (operating systems and applications). Early interfaces relied on command-line inputs, while modern interfaces are predominantly graphical, featuring icons and windows that are manipulated by pointing devices. The design of these interfaces aims to make technology more accessible and intuitive, thereby enhancing user experience and productivity.

Communication Studies as an Academic Discipline

Communication studies is an interdisciplinary academic field that examines the processes and effects of communication in various contexts. It covers a wide array of topics, from the technical aspects of message transmission to the interpretation of signs and symbols (semiotics). The field also investigates communication models, the role of communication in society, and the psychological underpinnings of how messages influence individuals and groups. Communication studies provide insights into the evolution of communication technologies and their societal impacts, as well as the principles guiding effective communication.

Evolution of Communication Studies

The formal study of communication has roots in ancient civilizations, with Greek philosophers like Plato and Aristotle analyzing the art of rhetoric and public discourse. The discipline has evolved significantly, particularly in the 20th century with the emergence of mass media and digital communication technologies. Contemporary communication studies is a diverse field that encompasses various forms of communication, such as interpersonal, intrapersonal, verbal, non-verbal, and mass communication. It also includes specialized areas like organizational, marketing, political, intercultural, and health communication, reflecting the multifaceted nature of human interaction and the importance of communication in all aspects of life.