Cours - Réseaux
54 documents à télécharger gratuitement
Cours de réseaux partagés par des étudiants et des enseignants. Thèmes couverts : TCP/IP, routage, Cisco, VLAN, administration réseau.
Ce document présente les réseaux locaux, leur définition et l'importance de la communication entre utilisateurs. Il décrit les différents types de réseaux, leurs topologies physiques, ainsi que les éléments matériels nécessaires pour leur fonctionnement. Enfin, il aborde les applications nouvelles associées aux réseaux locaux.
L E MOBILE : U NE HISTOIRE DE GÉNÉRATION ○ 1983: La 1G : C’est l’ancien Radiocom 2000 de France Télécom. (Modulation analogiques ) ○ 1988: Réseaux cellulaire numérique GSM : 2G European (services offerts: voix et SMS ) ○ 1990: IEEE 802.
W IRELESS LAN (WLAN) D finition : Un r seau d'ordinateurs et de mat riels sans fil qui offre les fonctionnalit s des r seaux locaux LAN traditionnels (Ethernet), mais en utilisant une technologie sans fil .
P LAN Emplacement dans le mod le OSI R le de la couche liaison Organisation de la couche liaison : LLC, MAC Exemple de protocole de la couche liaison : Ethernet (r seau local) Service tramage Adressage MAC Service contr le de flux Service acc s canal 2 A RCHITECTURE ET PROTOCOLES R SEAUX Chapitre 4: Les r seaux locaux: le protocole Ethernet Dr.
P LAN ○ Routage statique ○ Routage statique par défaut ○ Routage dynamique: RIP 2 A RCHITECTURES ET PROTOCOLES RÉSEAUX Chapitre 3: La couche réseau: le routage Dr.
ECUE : Fondement des R seaux Chapitre 1 : Notion de base en r seaux Introduction La notion r seau est une notion assez vague et en vogue aujourd hui. Un r seau n est qu un ensemble d ordinateurs et de p riph riques reli s entre eux dans le but d changer des donn es.
Ce document traite des principes de codage et transmission de l’information dans les réseaux. Il aborde les problèmes de transmission, les perturbations affectant les signaux et les caractéristiques des supports de transmission. Des solutions aux problèmes de déformation du signal sont également discutées.
Ce document traite du modèle en couches OSI, qui est essentiel pour la transmission de données sur les réseaux informatiques. Il aborde la nécessité d'une structuration en couches pour réduire la complexité et améliorer l'interopérabilité des technologies. Le texte fournit également des descriptions détaillées des différentes couches du modèle et de leurs fonctions.
This document discusses the importance of time in distributed systems, particularly focusing on synchronization and coordination among processes. It highlights the challenges faced due to unsynchronized clocks and the implications for systems like GPS and internet communications. The course aims to help understand how processes can effectively synchronize and coordinate their actions.
This document extensively discusses Network Address Translation (NAT), covering its static, dynamic, and port address translation (PAT) methods. It explains NAT's roles in IP address conservation, security improvements, and facilitating network configurations during ISP transitions. Specific configurations, terminologies, and examples relevant to Cisco environments are addressed, including NAT's integration with various network services like FTP and proxy servers. The document also highlights challenges like port-forwarding limitations and NAT-related issues with certain applications and pr...
This document discusses advanced digital communication techniques, specifically addressing transmission models and the reception of M-PAM, M-PSK, QAM, and M-FSK modulations. It details the architecture and operation steps for each modulation type, including spectrum transposition and decoding processes, which rely on matched filtering and correlation principles. The performance of these modulations is analyzed with respect to error probabilities for symbols and bits, incorporating mathematical models involving Signal-to-Noise Ratios (SNR). Finally, particular focus is given to M-ary modulat...
This document introduces the fundamental principles of digital modulation, outlining its purpose of converting digital symbol sequences into modulated signals carried by a high-frequency carrier. It categorizes the main types of modulation as amplitude, phase, and frequency modulation. Specific examples include 4-symbol amplitude modulation and quadrature phase shift keying (QPSK). Lastly, it discusses the application of digital modulation in frequency division multiplexing (FDM), which allows multiple signals to occupy separate frequency bandwidths within a channel.
This document provides an overview of mobile networks, including introductory concepts, cellular, satellite, and wireless networks. It discusses the performance of wireless devices, user needs, and various application domains. The course also touches on the historical evolution of mobile communication technologies.
This document introduces the concept of socket programming, a cornerstone in computer networking, focusing on different types of sockets (stream and datagram) and how they manage communication. It explains socket creation, connection, data transfer, and closure, both in connected (TCP-based) and non-connected (UDP-based) modes with real-world service examples (e.g., http, ftp, snmp). Implementation is demonstrated with concrete programming examples in Java, covering classes such as ServerSocket, Socket, DatagramSocket, and DatagramPacket. The document illustrates key techniques for handling...
Ce document traite des modèles hiérarchiques et des modèles de données réseau. Il décrit les caractéristiques principales de différents types de liens entre entités, tels que 1:1, 1:N, N:1, et N:M. Des exemples spécifiques sont donnés pour chaque type de lien afin d'illustrer leur sémantique.
This document describes the design and implementation of a network monitoring solution for the Tunisian Television enterprise. Initially, the existing network infrastructure was analyzed to detect inefficiencies and areas for improvement. A new architecture incorporating Cisco switches and optimized configurations was developed to enhance network performance and reliability. The implementation involved the deployment of the open-source platform 'Cacti' to monitor network devices, interfaces, and overall performance effectively. Comprehensive testing verified the system's capabilities to sup...
This thesis addresses the implementation of a network supervision solution for the Tunisian Television's IT infrastructure. It begins by assessing the current network infrastructure and identifying limitations. A new network architecture is proposed, involving the configuration and installation of Cisco switches and VLANs. The project evaluates various supervision tools, selecting Cacti as the primary software for monitoring network performance. The final solution demonstrates successful network visualization and management, ensuring improved reliability and performance.
This document presents a comprehensive overview of Tunisie Telecom, including its history, activities, and organizational structure. It also discusses the Centre de construction de lignes and its significant role in telecommunications. Finally, the document analyzes various aspects of urban telephone networks and services provided by CCL.
This document discusses the internship experience at Tunisie Telecom, highlighting the organization's history, activities, and structure. It also covers various aspects of urban telephone networks and the services provided by the CCL. The conclusion expresses gratitude towards Tunisie Telecom for the opportunity to gain practical experience in the telecommunications field.
This document serves as an introduction to networking, exploring physical structuring, applications, and types of networks. It covers essential concepts including network topologies and transmission modes. The information presented is foundational for understanding computer networks and their components.
Ce document traite des protocoles de liaisons de données dans le contexte des réseaux. Il décrit la structure des trames, les méthodes de délimitation et les techniques de contrôle des erreurs. L'importance de la synchronisation et de l'identification des trames est également abordée.
Ce document traite des méthodes d'accès au canal dans les réseaux, en mettant l'accent sur les liaisons point-à-point et multipoints. Il aborde des concepts tels que la contention, la synchronisation, et les classifications des méthodes d'accès, notamment les approches centralisée et distribuée. L'évolution du protocole ALOHA est également examinée, en soulignant son impact sur la communication sans fil.
This document provides an overview of computer network engineering, focusing on the complexities of modeling systems. It discusses the processes of modeling, validation, optimization, and various methods for evaluating system performance. The course also explores applications in emerging technologies such as the Internet of Things.
This document outlines a course on network engineering led by Amine Dhraief. It covers various methods for evaluating network performance and includes practical examples such as the analysis of IEEE 802.11 networks. The course combines lecture content with applied methodologies in the field of network research.
















