Author: Eric JOUFFRILLON

Non classé

One-day hack

History of a cyber-aggression "HACK" I will tell you the story of my friend "GBen" who was the victim of a cyber-aggressor.     INTRODUCTION / CONTEXE   We currently work abroad and are staying in a hotel. As in most hotels, a free WiFi connection (without login/mdp) is available. GBen has a laptop: –

Non classé

QOS –

– QOS –   Quality of service (QOS) is the ability of a network to guarantee one service (e.g. VOIP) at the expense of others. Congestion is the trigger for qOS implementation.   congestion     Following the above interpretation, congestion is the saturation of an interface (often the exit route of the network). This

Non classé

QOS – Classification and marking

  introduction Let's get straight to the point!     Type of flow and requirements  Data (HTTP, FTP) Its requirements are unique by application (often support delay and loss). In order to implement a quality QOS, you have to analyze the applications.    Voice (VoIP) In order to have a good audio call quality: Delay

Non classé

QOS – Introduction

Defining a data stream A data stream is characterized according to the following 4 parameters: Bandwidth Bandwidth Example: 2Mbps Delay (Latency) Reference transit time of a package on a given medium (Fibre, Satellite Link) Example: 100ms Jitter (Gigue) Change in transit time on a given medium Example: the transit time varies between 80 and 120ms,