Computer Networks: A Comprehensive Overview

Posted by on Nov 1, 2024 in Computers | 0 comments

Computer Networks

Introduction

A computer network is a set of interconnected computers that communicate with each other via various mediums like cable, satellite, microwave, telephone lines, and fiber optics to share information. Each active device connected to the network is called a node.

Uses of Networks

Networks are primarily used for:

  • Resource Sharing: Sharing resources, especially information, is a primary function of networks. This includes sharing programs, files, and peripherals like printers
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Data Transmission Fundamentals in Telecommunications

Posted by on Nov 1, 2024 in Computers | 0 comments

TP 5: Data Transmission Fundamentals

What is Telecommunications?

Telecommunications refers to the transmission of information over a distance. This includes technologies like telephony, telegraphy, and television. The term originates from the Greek word “tele,” meaning “far” or “at a distance.”

Distributed Processing and its Advantages

What is Distributed Processing?

Distributed processing involves dividing a task among multiple computers within a network. Instead of relying on a single powerful machine,

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UNIX/Linux Tutorial: A Comprehensive Guide

Posted by on Nov 1, 2024 in Computers | 0 comments

1. Steps to Start Using UNIX

  1. Upon turning on the computer, the user is informed of the installed UNIX version.
  2. The system prompts for a login or username.
  3. The system prompts for a password.
  4. The prompt, also known as the command prompt or shell prompt, appears.
  5. The .profile file is executed.

2. What is a Shell?

Several shell variations exist, including the standard Bourne shell, Korn shell, C shell, and Bash. A shell script is a text file containing commands, executable programs, and control structures.

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Programming Languages and Software Development

Posted by on Nov 1, 2024 in Computers | 0 comments

Programming Languages

At Stage Coding are Elaborated Source Programs

First-Generation Languages

Assemblers with a low level of abstraction.

Second-Generation Languages

No dependence on computer structure. Prime high-level languages. Examples include Fortran, Cobol, Algol, and Basic.

Third-Generation Languages

Seen under two approaches:

  1. Imperative Programming: Strongly typed languages with redundancy between declaration and use of each data type, facilitating verification during compilation. Examples include:
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Cybersecurity Essentials: Understanding Threats and Protection

Posted by on Nov 1, 2024 in Computers | 0 comments

Cybersecurity Essentials

Encryption Methods

Symmetric Encryption

Symmetric encryption uses the same key for both encoding and decoding. This key is shared between the sender and receiver, allowing the sender to encrypt the message and the receiver to decrypt it.

Asymmetric Encryption

Asymmetric encryption, also known as public-key cryptography, uses two distinct keys: a public key for encryption and a private key for decryption. The sender uses the receiver’s public key to encrypt the message, and the

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Network Fundamentals Practice Quiz: Test Your Knowledge

Posted by on Oct 31, 2024 in Computers | 0 comments

Network Fundamentals Practice Quiz

Test Your Knowledge

1. UDP Protocols

Which of the following application layer protocols use UDP segments? (Choose two.)

  • DNS
  • TFTP

2. UTP Cable Advantages

What are the advantages of UTP cable installation? (Choose three.)

  • Less expensive than fiber optic
  • More flexible and easy to install
  • Allows a simple upgrade of WAN hardware

3. Crossover Cable Use

When do you use a crossover cable on a network?

  • When connecting a host to another host

4. Token Ring Topology

Which of the following

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