Qu’apportent les réseaux ?

q Les réseaux permettent :

q  Le partage des fichiers

q  Le partage d’application : compilation, SGBD

q  Partage de ressources matérielles : l’imprimante, disque…

q  Télécharger des applications et des fichiers

q  L’interaction avec les utilisateurs connectés : messagerie

électronique, conférences électroniques, ….

q Le transfert de données en général: réseaux informatiques

q Les transfert de la parole : réseaux téléphoniques

q Le transfert de la parole, de la vidéo et des données : réseaux numérique à intégration de services RNIS ou sur IP.

Usage des réseaux : (apport aux entreprises)

•    Partager des ressources: imprimantes, disque dur, processeur, etc.

•    Réduire les coûts:

Exemple: au lieu d’avoir une imprimante pour chaque utilisateur qui sera utilisée 1 heure par semaine, on partage cette même imprimante entre plusieurs utilisateurs.

Remarque: Les grands ordinateurs sont généralement 10 fois plus rapides et coûtent 1000 fois plus chers.

•Augmenter la fiabilité: dupliquer les données et les traitements sur plusieurs machines. Si une machine tombe en panne une autre prendra la relève.

•    Fournir un puissant média de communication: e-mail, VC …..

•    Faciliter la vente directe via l’Internet.

Usage des réseaux : (apports aux individus)

•    Accès facile et rapide à des informations distantes:

Informations de type financier: Paiement de factures, consultation de solde, etc.

Recherche d’informations de tout genre : sciences, arts, cuisine, sports, etc.;

Accès à des journaux et bibliothèques numériques: News …

•    Communication entre les individus : Vidéoconférence, courrier électronique, groupes thématiques (newsgroups), clavardage (chat), communication poste-à-poste (peer-to-peer), téléphonie et radio via Internet, etc.

•    Divertissements et jeux interactifs : vidéo à la carte et toutes sortes de jeux (jeux d’échec, de combats, etc.)

•    Commerce électronique (e-commerce) : transactions financières, achats en ligne à partir de son domicile.

Introduction au réseaux informatique

Introduction au réseaux

informatique

Mme Belbasri Saadia

Ingénieur d’Etat Réseaux et Télecoms

qPartie I

qConcept  de réseau

qLe modèle OSI

qEmpilement en couche OSI

qLes fonctions des couches OSI

qEvaluation de la matière

qExamens écrits

qVoies d’approfondissement

qRecherche annexe au cours

qParticipation Cours/TD

q Les télécommunications peuvent être structurées de différentes manières.

q Une approche possible consiste à considérer les télécommunications, du point de vue de l'utilisateur et de l'exploitant, sous ses aspects :

Ø  Réseau

Ø  Services

q Différents services imposent des exigences différentes au réseau.

q Ces exigences déterminent le type de réseau approprié aux services.

q Elles affectent également la planification et le dimensionnement du réseau.

•           Il est conçu pour permettre la circulation…

–      Des véhicules : Le réseau routier

–      Des trains : le réseau ferré

–      De l’électricité : le réseau électrique

–      De la voix : le réseau téléphonique

–      … Et des données : Le réseau informatique

q  Un réseau est un ensemble de ressources matérielles et logicielles

•    Offrir un service

–    Assurer l’accès à une ressource

–    Partager les ressources

–    Assurer une plus grande fiabilité

–    Réduire des coûts

–    Transporter l’information sur grandes distances

–    Augmenter graduellement les performances ‘scalability’

– Ex: RTC, LAN, ADSL, Wi-Max, Wi-Fi, Transmission, Commutation, RNIS, X.25, GSM, GPRS,….

CCNA 1 (v5.02)

CCNA 1 (v5.02)

Overview

CCNA 1: Introduction to Basic Network is the first of the four courses prompting the Cisco ensured Network Associate (CCNA) assignment. CCNA 1 presents Cisco Organizing Academy Program understudies to the systems administration field. The course  spotlights on system wording and conventions, local area network (LANs), wide-area network (WANs), Open System Interconnection (OSI) models, cabling, cabling instruments, switches, switch configuration, Ethernet, Internet Protocol (IP) tending to, and system measures. Furthermore, guideline and preparing are given in the correct consideration, upkeep, what's more utilization of systems administration programming, devices, and supplies and all neighborhood, state, and government wellbeing, building, and ecological codes and regulations.

Course Outline

1. CCNA 1 Introduction
2. Networking Basics
3. Cisco IOS and CLI
4. Beginning Network Addressing PT Activity
5. Communicating on a Network - Page 1
6. Communicating on a Network - Page 2
7. Communicating on a Network - Page 3
8. Communicating on a Network - Page 4
9. Physical Layer
10. Data Link Layer
11. Ethernet

Cisco IOS and CLI

Cisco IOS and CLI

Overview

For the Cisco CCNA you are obliged to know how to design Cisco switches and Cisco switches utilizing the charge line interface or CLI. An order line interface is a charge driven client shell that permits the client to interface with the working framework. The order line interface or CLI is worked with only a console. Interestingly a graphical client interface or GUI is a symbol and menu driven client shell portrayed by the utilization of a mouse notwithstanding a console. The Cisco working framework, utilized with Catalyst switches and incorporated administrations switches is known as the Cisco IOS, or Internetwork Operating System.

RAM (temporary memory) - The IOS and the config document are stacked and run in RAM when the switch boots up, yet they are regularly spared or put away in FLASH (IOS) and NVRAM (startup-config). The directing table is run from RAM. Switches and switches execute everything in RAM which is the reason they are so quick. Design changes are promptly executed in RAM (running-config) yet can be spared to NVRAM (startup-config) to be made perpetual.

Flash (permanent memory) - This is the place the IOS is spared

NVRAM (permanent memory) - This is the place the startup-config record is spared

ROM (permanent and unchangeable) - This is the place the BIOS, POST, and ROMMON are put away.

The IOS and CLI

The Cisco IOS is the Cisco working framework. The IOS is particular to the Cisco gadget it was intended for, having diverse capacities and devices included in it.

Along  these  lines, the Cisco IOS comes in a wide range of sizes, capacities, particulars and modifications.

As a component of the Cisco IOS, the CLI or summon line interface is incorporated on every Cisco gadget including, Cisco switches, switches, and remote access focuses and spans. Most Cisco gadgets likewise have a GUI or graphical client interface. The center of the Cisco CCNA is taking in the CLI, order line interface. The order line interface is a regulatory interface used to arrange the Cisco gadget. There are three approaches to get to the CLI:

Console - the reassure port is a direct serial association utilizing a support/rollover link joined from the Cisco gadget's comfort port to a PC serial port. Generally the starting strategy for arranging a switch or switch, on the grounds that it doesn't depend on systems administration being empowered. A support association is likewise how you would recoup a switch with an erased setup document, IOS record, or overlooked watchword.

Telnet or SSH - the capacity to telnet or SSH into a Cisco gadget is a remote managerial association that can likewise be carried out from the neighborhood system. With a specific end goal to telnet or SSH into a Cisco switch or switch you will initially need to raise a system interface by arranging it with an IP address, subnet veil, and issuing the "no shutdown" order .

Aux - The helper port is intended to associate with a modem. It is utilized for a dial as a part of association with the switch or switch. This remote authoritative association can likewise be carried out mainly.

The CLI has diverse order modes, with particular summons accessible in every mode. The diverse charge modes are:

User exec mode - Only a couple of summons are accessible in this mode. Orders like "ping", a couple of the "show" summons

Privileged exec mode - All of the User executive orders in addition to the majority of the "show" and "investigate" charges

Global config mode - Access to all of setup orders and expansion arrangement modes

Global sub configuration modes - interface arrangement mode, switch design mode, and so forth.

Commands

• Router>enable
• Router#configure terminal
• Router#show running-config
• Router#show startup-config
• Router#show version
• Router#show flash
• Router#copy running-config startup config

Networking Basics

Overview

Toward the start of a course of study towards the Cisco CCNA, it is a smart thought to have a comprehension of fundamental systems administration terms and ideas. Here is a rundown of basic ideas that you ought to be acquainted with: 

LAN - a neighborhood or LAN is a system that has the accompanying qualities. It normally exists inside a home, building or gathering of structures. It is generally controlled and oversaw by a solitary substance, business, or association. What's more, a LAN commonly comprises of some type of an Ethernet system, whether it is Fast Ethernet (100Mb), Gigabit Ethernet (1000Mb), and whether it is actualized in contorted pair copper links, multimode fiber optic links, or some manifestation of remote innovation. 

WAN - wide region systems are the systems that interconnect the greater part of the neighborhood. WANs are commonly overseen and controlled by network access suppliers (ISPs). As opposed to utilizing Ethernet, WANs commonly actualize diverse innovations like DSL, Cable, T1 and T3 serial lines, PPP, Frame Relay, ATM, and so forth.. 

WANs/LANs - To rearrange the contrasts between these two sorts of systems we can utilize the illustration of a remote switch. On the remote switch the LAN ports and the remote recieving wires interface with the PCs on your neighborhood system or LAN, and the WAN port join with the modem which speaks with your web access supplier on the WAN.  

LAN & WAN

Internet, Intranet, Extranet - What is the distinction between the web, an intranet, and an extranet?

Internet - bury implies between, and net is short for systems, so web actually implies between systems. So what is the web? The system of systems. The system structured by interfacing the greater part of the systems together. 

Intranet - intra implies inside and net means system, so intranet implies inside the system. For example, when I taught secondary school I needed to have my own web server. The school locale consented to give me a chance to have my own web server for my understudies, however it must be on the intranet just. This implied that the understudies could achieve the pages yet from inside the school just. The webserver was not on the web. 

Extranet - additional means notwithstanding, and net means system, so extranet truly implies notwithstanding the system. An extranet is a range of the system that clients who are outside of the system can remotely associate into. This could be possible with VPN administrations, permitting clients with consent to VPN into a range of the system.

CCNA 1 Introduction

CCNA 1 Introduction

The Cisco CCNA accreditation is the most remarkable PC organizing confirmation in the business. I prescribe a Cisco course of study and the Cisco Academy Curriculum specifically to any individual who needs to find out about PC organizing. It is the best establishment for finding out about system correspondence conventions, system tending to including IPv4 and IPv6, subnetting, steering, exchanging, VLANs and the sky is the limit from there!

As a Cisco Networking Academy teacher I have taught the Cisco CCNA educational module for more than 12 years. The Cisco Academy offers 4 classes that together guide to the Cisco CCNA certificate exam. The current exam is the 200-120 CCNA, which has a stronger accentuation on IPv6. All understudies that are selected through the school will qualify to be enlisted in the Cisco Academy, and all Cisco Academy understudies will have entry to online educational module materials and also the most recent variant of Packet Tracer (6.1), an incredible apparatus for making mimicked arranged situations, complete with working switches, switches, and has.

In fall 2013, the Cisco Academy discharged an upgraded adaptation of their CCNA educational module. This overhauled educational program harmonizes with the new 200-120 CCNA exam and incorporates numerous new range of study including a much stronger empahasis on IPv6.

Course Materials

The greater part of the course materials are accessible through the Cisco Academy site through their learning administration framework. This incorporates the complete content, the Packet Tracer programming system, intelligent exercises, different decision exams, and a lot of labs with complete directions. On the off chance that you lean toward a paper duplicate of the content you can buy one online from Cisco Press or Amazon. Verify you request a current rendition of the content. I have given a connection to the content at Cisco Press and the ISBN number:

Prologue to Networks Companion Guide: Print ISBN: 978-1-58713-316-9, eBook: ISBN: 978-0-13347-544-9

Class Schedule and Policies

At the point when would I be able to go to the Lab/Classroom? 

Amid class hours or by plan.

Where would I be able to do my labs?. 

A few labs will be carried out in class, a few labs will be carried out at home utilizing Packet Tracer, and a few labs could be possible by remotely uniting the division Netlab.

Imagine a scenario where I am an online understudy, and I can't go to the lab. 

In the event that you are an online understudy, I prescribe that you login to Blackboard and go to the class online through the Blackboard feature conferencing apparatus. The is constantly accessible through feature gathering and it will likewise be recorded and accessible for viewing later.

In what manner would I be able to guarantee that I will be fruitful? 

The understudies that show up routinely, week by week, both in individual, and online by logging into the spilling feature gathering, and viewing the recording of the gushing feature meeting are the ones that will be effective. The class will advance pleasantly on the off chance that you make a timetable of times that you will deal with the class assignments.

Is there a syllabus? 

The syllabus is accessible on Blackboard furthermore according to popular demand for those that are intrigued.

By what method will I turn in assignments? 

Exams will be taken online through the Cisco Academy site and learning administration framework. Labs will be transformed into me straightforwardly.

What are the assignments and by what method will I be evaluated? 

I review on a point framework. Consistently you will have the chance to acquire focuses from part exams and section labs. Toward the end of the class there is an aggregate different decision end of the year test and a combined lab last.

CCNA v5.02 Packet Tracer Lab

Welcome to CCNA v5.02 Packet Tracer Lab!… In this page will bring you to external web that shows you more CCNA Lab. These labs are cover on more topic such as Routing, Switch, LAN, Redundancy, Security, NAT, STP, VLAN, ACL, VTP, HSRP, and IPv6. We try to build more Packet Tracer Lab with instruction and guide line to help you easy to understand and practice. All Packet Tracer files and document are stored on dropbox. Before you try these lab, make sure your PC has met requirement.

Requirement for PC:

• PC run with Window Platform
• CPU 2GHz up
• Ram 2GB up
• GPU 512MB up
• Packet Tracer 6.1.1 up
• Power Point Viewer( MS Office, Open Office,…)

Please click links below to access Packet Tracer Lab that you are prefer!…

1. CCNA 1 (v5.02) Lesson + Configuration

CCNA 1 Lab Exam Answer (v5.02, 2015)

1. CCNA 1 Chapter 6 PT Practice Sskills Assessment

2. CCNA 1 PT Practice Skills Exam

CCNA 2 Lab Exam Answer (v5.02, 2015)

1. CCNA2 Chapter 2 Practice Skills Assessment PT

2. CCNA2 Chapter 6 Practice Skills Assessment – PT

3. CCNA2 NB_ITN Practice Skills Assessment – PT

4. CCNA 2 RSE Practice Skills Assessment – PT 2015

CCNA 3 Lab Exam Answer (v5.02, 2015)

1. CCNA3 NB_ITN Practice Skills Assessment – PT

2. CCNA3 RSE Practice Skills Assessment – PT

CCNA 4 Lab Exam Answer (v5.02, 2015)

1. CCNA4 NB_ITN Practice Skills Assessment – PT

2. CCNA4 RSE Practice Skills Assessment – PT