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{{ :cours:man-1915351_1280.jpg?150|}} 
====== Networks, Internet and Web Services, BAT4 ======

Main Advisors : Ass. Prof. J.Y. Tigli, Ass. Prof. H. Collavizza

Language : English 

===== Networks introduction =====
Lecturer : Ass. Prof. J.Y. Tigli 

All the networks introduction is dedicated to explain what are the differents technology for Telecommunications and Data Communication Systems are used in Smart Buildings. 

Generally these basic concepts are necessary to understand how to deploy electrical low power in future building. 

All the explanations in the course are related to one common model shared by the most of electrical, electronical, control, computer and software engineers in this field : OSI Model
{{ :cours:osi-model.png?200|}}

==== Session 1 : Networks introduction : OSI Physical / Data Layers ====
Lecturer : Ass. Prof. J.Y. Tigli 

=== Course Material : ===
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** Purpose of the course : **
  * Telecommunication Principles : Medium and Analog Signal propagation 
  * Data Communication : Data encoding on Analog Signal 
  * Different Types of Medium and basic signal frequencies
  * Different Types of Techniques for Data encoding on a medium  and corresponding equipments 
  * Different Types of Techniques for Simultaneaous Data Communications on a medium and corresponding equipments 
  * Introduction to the OSI Model after the introduction to the two first layers

  * Slides of the course : {{:cours:networks_introduction_physical_data_layers.pdf| Networks Introduction for physical and data layers in OSI Model}}

==== Session 2 : Data Link Layer and Ethernet ====

{{:cours:data_link_layer_-_ethernet.pdf| Second OSI Model Layer : Data Link - Ethernet Example}}


==== Session 3 : Network Installation, Lab on a use Case ====

The purpose of this lab is to produce documents and planning studies for implementing local telecommunication networks (like Ethernet and  wifi) and a dedicated electrical distribution for a three-levels building. 

||
** Networks Layout Floor Plan**

  * Installation for a try period of [[http://www.conceptdraw.com/How-To-Guide/house-electrical-plan|ConceptDraw Office]]


** Use Case ** 
  * The document giving all the information about the project is {{:cours:dossier_implantation_ethernet_wifi_elec_telecom.pdf|here}}.

  * The plan of the building is {{:cours:house_floor_plan.jpg?linkonly|here}}. Download it to add all information you want on it with your favorite graphical software (ConceptDraw for example). 

  * {{:cours:house_network_layout.zip|Files of the ConceptDraw Plan for the exercice}}

<note warning>

This session is evaluated. Student must send at the end of the session a zip file with their production before  March, the 9th 2020 (see {{:cours:dossier_implantation_ethernet_wifi_elec_telecom.pdf|details}}).
</note>

==== Session 4 : Internet and its Transport protocols ====

{{:cours:networks_introduction_ip_layers.pdf|Introduction to Internet and transport protocols}}


  * [[cours:bat4:netipws:ipudptcpsummary|Internet: Summary, Exercices and Comments]]

  * [[cours:bat4:netipws:udptcpsummary|Transport Protocols: Summary Exercices and Comments]]


==== Session 5 : UDP & TCP introduction, TCP C# .Net Programming  ====

  * {{:cours:transport_protocols_introduction_udp_tcp_c_.net.pdf|UDP, TCP, and C# Programming}}
  * {{:cours:tcp_listener_client_-_simplest_code.zip|zip file of a C# .Net solution for a TCP Client and Server }}

{{:cours:tcp_listener_web-webserver-onerequest.zip|}}
==== Session 6 : TCP/IP Web Server and Introduction to Web Services  ====

=== TCP/IP Web Server ===

  * {{:cours:tcp_listener_web_-_simplest_web_server-_one_request.zip|zip file of a C# .Net solution for a TCP/IP Web  Server}}
  * Test it with your favorite web browser 

=== Introduction to Web services through examples  ===

== My first software service over TCP/IP ==
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  * Modify the source code of the example of the session 3 to run the server and the client on different computers (be careful, sometimes firewall may block the ports for communications between computers) 

  * Modify the same code to implement server that receive two double values and return their addition to the client.  ** THIS IS YOUR FIRST SOFTWARE SERVICE ! the Client subcontracts the add operation to the server. ** 


== My first software service over Web (i.e. Web Services) ==
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  * Web is when HTTP protocol is used over TCP/IP protocols for communications between a client and a server. 
  * Modify the Web server code above to implement server that receive two double values after the ? and & caracters in the URL (ex. http://localhost:8080/add?val1=3&val2=5)  and return their addition to the client (ex. in our case : 8)  ** THIS IS YOUR FIRST WEB SERVICE ! the Client subcontracts the add operation to the web  server. ** 
{{:cours:tcp_listener_web.zip|C# solution of the TCP listener web server with addition}}

== Why Web Services are interesting ? ==
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  * because the port 80 of the web servers is generally one of the few not to be filtered by the firewalls 

  * because all the major software companies are sharing web service standards and allow to program servers and clients using these common standards 

  * because thanks to some of these standards, using remote web service is very easy in a software client. For example, with WS-SOAP  we import functionalities from Web Service in a software client like from DLL with //add Web references// to the client project instead of //add References//)


== Accessing RESTful Web Services ==
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REST stands for REpresentational State Transfer. REST is a web standards based architecture and uses HTTP Protocol for data communication (see for short introduction https://www.ibm.com/support/knowledgecenter/en/SSGMCP_5.2.0/com.ibm.cics.ts.webservices.doc/concepts/concepts_restful.html).

In this session, we concentrate on RESTful webservices that uses resources represented in //json//. You first learn how to handle //json// data and then how to connect and use data from a weather Web Service and a geographical Web Service.

  * {{:cours:webservicetodo.pdf|What's to do in this session}}
  * Introduction to //json// : {{:cours:jsonexample.zip|C# solution with simple examples of json manipulation}}
  * Accessing a weather and a geographical Web Service : {{:cours:openweather.zip|C# solution to access openweather Web Service}}.

===== Past Courses 2016 - 2017 =====
[[https://www.tigli.fr/doku.php?id=cours:cours_internet_et_reseaux_partie_1_et_2_bat4|French 2016 2017  Course on Networks Internet and Web Services]]
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