PEER TO PEER AND WIRELESS NETWORKS E LABORATORIO

Academic Year 2019/2020 - 2° Year - Curriculum Sistemi di Rete e Sicurezza

Learning Objectives

• Peer to peer and wireless networks

  Knowledge and understanding: the aim of the course is to acquire advanced knowledge that allow the student to understand theoretical mechanisms which constite the base for a distributed communication protocol; in detail, the student will acquire knowledge of main P2P and wireless networks protocols.
  
  Applying knowledge and understanding: student will acquire knowledge usefull to design a distributed coordination protocols specific for an Overlay Network, defining suitable feature to promote collaboration, optimizing , at the same time, the exploitation of the shared resources. For this reason, a part of the course will be held in laboratory, with lessons dedicated to the study of the NS2 simulator, in order to allow performance evaluation of a network protocol.
  
  Making judgements: the study cases presented, based on real network protocols, will allow the student to discover limits and errors of their design; this will be the basis for autonomously developing of new solutions, going beyond restrictions due to scalability in distributed systems.
  
  Communication skills: student will acquire advanced communication skills using technical language in the field of network protocols and distributed systems.
  
  Learning skills: the course provides, to the student, teoretical and practical methodologies in order to deal with new problems that can rise during designing activity.
  
  

• Laboratory of Peer to peer and wireless networks

  Knowledge and understanding: the aim of the course is to acquire advanced knowledge that allow the student to evaluate the performance of a distributed communication protocol.
  
  Applying knowledge and understanding: student will acquire knowledge usefull to design a distributed coordination protocols specific for an Overlay Network, defining suitable feature to promote collaboration, optimizing , at the same time, the exploitation of the shared resources. For this reason, a part of the course will be held in laboratory, with lessons dedicated to the study of the NS2 simulator, in order to allow performance evaluation of a network protocol.
  
  Making judgements: the study cases presented, based on real network protocols, will allow the student to discover limits and errors of their design; this will be the basis for autonomously developing of new solutions, going beyond restrictions due to scalability in distributed systems.
  
  Communication skills: student will acquire advanced communication skills using technical language in the field of network protocols and distributed systems.
  
  Learning skills: the course provides, to the student, teoretical and practical methodologies in order to evaluate new network protocols.

Course Structure

• Peer to peer and wireless networks

  Classroom lessons

  Laboratory lessons

• Laboratory of Peer to peer and wireless networks

  Laboratory lessons

  Practice exercises in laboratory

Detailed Course Content

• Peer to peer and wireless networks

  The Clien-Server model vs the P2P model
  The overlay networks
  Origin of the P2P

  Properties of the P2P networks
  Network typology: pure, hybrid,structured, DHT, hierarchical, decentralized
  Case of study:

  • Napster
  • Gnutella 0.4
  • Edonkey, Gnutella 0.6, Gnutella 2 FastTrack, OpenFT
  • Emule
  • Freenet
  • Chord, Pastry

  Wireless networks
  Wired vs wireless
  Implicit limitation of the wireless system
  New Application in wireless
  Taxonomy
  Introduction to phisical layer: channel access problem
  The CSMA/CA solution
  IEEE 802.11: BSS, ESS, IBSS structures
  Structured and AdHoc Networks
  Phisical and virtual carrier sensing
  The IEEE 802.11 standard
  The DCF
  MACAW, NAV, RTS/CTS, DS
  Temporarization in 802.11: SIFS, PIFS, DIFS, EIFS
  The PCF
  Structure of the IEEE802.11 frames
  MAC Addresses
  Case of study: Theoretical performance of a TCP transmission over IEEE802.11
  Routing protocols
  Mobile IP
  Routing protocols in MaNet:

  • DSR,
  • AODV,
  • DSDV
  • LRA

  TCP: Congestion control
  TCP variations

  • Tahoe
  • Reno
  • New Reno
  • Vegas
  • SACK
  • Westwood
  • Veno
• Laboratory of Peer to peer and wireless networks

  Introduction to discrete-events simulations
  Performance evaluation in a network
  The NS3 simulator
  Performance evaluation of a network connection using TCP Tahoe, TCP Reno, TCP new Reno
  Simulations over a MaNET with NS3

Textbook Information

• Peer to peer and wireless networks

  See "didactical material" into Studium
  

• Laboratory of Peer to peer and wireless networks

  NS3 reference manual.