Computers Archives - Page 18 of 278 - Student Notes

Understanding Computer Systems

Posted by admin on Apr 13, 2025 in Computers | 0 comments

Hardware and Software Fundamentals

Introduction

Computer systems consist of two main components: hardware and software. Hardware refers to the physical elements of a computer, while software comprises the instructions and data that control the hardware.

Software

Software can be categorized into:

Application Software: Programs designed for specific tasks, such as word processing or gaming.
System Software: Programs that manage and control the computer’s hardware, including the operating system (OS) and

Web & Mobile Development Concepts: Node, Express, Angular, Dart

Posted by admin on Apr 12, 2025 in Computers | 0 comments

Node.js Hello World Example

Create a simple Node.js HTTP server:

Install Node.js if you haven’t already.
Create a file named server.js and add the following code:

const http = require('http');

const server = http.createServer((req, res) => { res.writeHead(200, { 'Content-Type': 'text/plain' }); res.end('Hello World\n'); });

const PORT = 3000; server.listen(PORT, () => { console.log(Server running at <a href="http://localhost:${PORT}/">http://localhost:${PORT}/</a>); });

Run the server

SIP and H.323 Protocols: Architecture, Components, and Functionality

Posted by admin on Apr 8, 2025 in Computers | 0 comments

SIP: Session Initiation Protocol

SIP (Session Initiation Protocol) is a signaling protocol used at the application layer to create, modify, and terminate sessions with one or more participants. These sessions can include voice, video, data, and other forms of internet media.

IETF Architecture Protocols

The IETF architecture includes protocols such as:

RTP and RTCP: Provide real-time delivery of media.
RTSP: A real-time streaming protocol that provides a supply-demand mechanism in real time.
SDP: Session

Understanding Computer Architecture: Buses, Addressing, and Memory

Posted by admin on Apr 8, 2025 in Computers | 0 comments

Computer Bus Architecture

Bus: In computer architecture, a bus is a transport mechanism that logically connects several peripherals using the same set of wires. This concept is similar to a shuttle, facilitating internal data transfers within a computer system during operation.

A bus is defined as a set of electrical connectors, typically metal tracks printed on the motherboard, through which signals travel. These signals correspond to the binary machine language used by the microprocessor.

The main

Cryptography, Socket Programming, and Python OOP Concepts

Posted by admin on Apr 7, 2025 in Computers | 0 comments

Cryptography, Socket Programming, and Python OOP

Base64 Encoding Base64 Decoding

import base64 #encoding encoded_data = base64.b64encode(bytes('D','ascii')) print("Encoded text with base 64 is") print(encoded_data) import base64 #decoding decoded_data = base64.b64decode("RW5jb2RlIHRoaXMgdGV4dA==") print("decoded text is ") print(decoded_data)

Base64 Encoding	Base64 Decoding
`import base64 #encoding encoded_data = base64.b64encode(bytes('D','ascii')) print("Encoded text with base 64 is") print(encoded_data)`	`import base64 #decoding decoded_data = base64.b64decode("RW5jb2RlIHRoaXMgdGV4dA==") print("decoded text is ") print(decoded_data)`
Ciphers and Encoding Caesar’s Cipher: Simple cipher that uses an offset of 3. You just add the offset to the characters. Transposition Cipher: “hello world”

Ciphers and Encoding

Caesar’s Cipher: Simple cipher that uses an offset of 3. You just add the offset to the characters.
Transposition Cipher: “hello world”

Core Concepts in C and Python Programming