Computer Security and Protection Measures
Unit 6: Computer Security and Protection
Security Threats
Malware
Malicious software, any program intended to cause damage or harm the computer or user.
Virus
A type of malware that infects other files; it cannot exist independently but is embedded in the code of another file.
Worm
Malware whose main objective is to create as many copies of itself as possible to facilitate its spread. Unlike viruses, worms do not infect other files. Their objective is to overwhelm a computer system. They can spread via
Read MoreFundamentals of Telematics and Computer Networks
What is Telematics?
Telematics is a scientific and technological discipline arising from the evolution and fusion of telecommunications and computing.
Communication and Transmission Differences
Communication is the process by which information is transmitted from one entity to another. This transmission can be analog or digital.
Basic Elements of a Communication System
A communication system consists of the following elements:
- Message: The information communicated (text, numbers, audio, graphics).
- Transmitter:
Understanding Processes and Process Management in Operating Systems
1. Introduction
A process is a running program. It should be understood as a program associated with an activity. A program is a list of instructions written in a file on disk (e.g., any executable program with the extension *.exe). When this program is executed, it is loaded into RAM, and the instructions are executed. Then we have a program plus activity, i.e., a process loaded into memory. We often use the terms ‘process’ and ‘task’ interchangeably. Example: Ctrl + Alt + Delete -> Task Manager
Read MoreMultithreading Benefits, Synchronization, and Deadlock Prevention
Multithreading Advantages
The USO (User Space Option/User System Option – define the acronym if known) provides several multithreaded benefits. Programs using multiple threads are faster than those implemented with multiple processes because thread creation, context switching, and disposal generate less overhead.
- Threads share the same address space, enabling quick and efficient communication.
- Threads within the same process can easily share resources like file descriptors, timers, and signals.
In client-
Read MoreAlgorithms: Prim’s, Kruskal’s, Dijkstra’s, Quick Sort, Merge Sort, Knapsack
Prim’s Algorithm
C Implementation
#include <stdio.h>
#include <limits.h>
#include <stdbool.h>
#define V 5 // Number of vertices
int findMinVertex(int key[], bool mstSet[]) {
int min = INT_MAX, minIndex;
for (int v = 0; v < V; v++)
if (!mstSet[v] && key[v] < min) {
min = key[v];
minIndex = v;
}
return minIndex;
}
void primMST(int graph[V][V]) {
int parent[V], key[V];
bool mstSet[V] = {false};
for (int Human Communication Data Conversion: A Deep Dive
Human Communication Data Conversion
Seven Steps of Data Conversion
- User enters data via hardware interface.
- Software/hardware converts data to digital format.
- Application services initiate data transfer.
- OSI layers encapsulate data (downstack).
- Encapsulated data is conveyed to destination.
- Destination OSI layers decapsulate data (upstack).
- Data is ready for processing.
Application Layer Software
Application layer software has two forms:
- Applications: Interact directly with users, providing an interface between