A journey through the network - Hands on (Part 1)

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Prelude A long long time ago (I can still remember as Madonna sang) I started to wrote some posts about the network. For those who missed the previous posts, you can read the introduction, the physycal layer and the datalink layer respectively. As a main source I use Computer Networks and TCP/IP Illustrated. In the previous posts I had to go into details about how some parts of the physical layer works but - by going forward through the layers - concepts belonging to separate historical standards - OSI and IP - will intertwine and this entails some troubles from a logical point of view.


A journey through the network - Layer 2

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A journey through the network - Layer 2 A month ago I started to wrote some posts about the network. For those who missed the previous posts, the introduction and the physycal layer. For the previous post I had to go into details about how some parts of the physical layer work but, by going forward with the layers, concepts belonging to separate historical standards - OSI and IP - will intertwine and this entails some troubles from a logical point of view.


A journey through the network - Layer 1

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A journey through the network - Layer 1 Before the Christmas holidays, I wrote an article about the network: yes. The network is that part of computer science that is no longer considered fundamental as it should, and I must admit that I learn it every day at my expense: as an old friend always says to me "the network is the concept on which everything is based, describes how the body works: after that, you can also become a gastroenterologist, but you will always need to know how the body works".


A journey through the network - Introduction

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A journey through the network - Introduction During the last year I understood one thing: sooner or later everyone should review network notions, so I decided to start writing articles about network fundamentals. As a main source I would use Computer Networks and TCP/IP Illustrated. In this article, I will talk about two important network architectures: the OSI reference model and the TCP/IP reference model. These two model has opposite characteristics, in particular: - the ISO/OSI model protocols’ are not used any more, but the model itself is actually quite general and still valid and the features discussed at each layer are still very important; - the TCP/IP model is not of much use but its protocols are widely used;


Predix Machine and how to configure them

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Predix Machine and how to configure them In September, waiting for a contract proposal from the company where I currently work, I wrote a tool for the (more or less) automatic configuration of Predix© Machine. Predix©1 is the platform created by GE for Industry 4.0, powered by CloudFoundry2, to securely connect machines, data, and analytics to improve operational efficiency, help you develop, deploy, and operate industrial apps at the edge and in the cloud.