Computer Networks (2008/2009)

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Course code
Davide Quaglia
Teaching is organised as follows:
Unit Credits Academic sector Period Academic staff
Teoria 4 INF/01-INFORMATICS 3° Q Davide Quaglia
Laboratorio 1 INF/01-INFORMATICS 3° Q Davide Quaglia

Learning outcomes

Module: Teoria
This class aims at describing the basic concepts and the main design methodologies of the modern communication networks, both local and geographical.

Module: Laboratorio
This class aims at describing the basic concepts and the main design methodologies of the modern communication networks, both local and geographical.


Module: Teoria
32 hours covering the following topics:

* General concepts:
-- classification: WAN, LAN, PAN;
-- topologies;
-- shaping and policing: leaky bucket and token bucket;
-- circuit-switched and packet-switched networks;
-- reference models: ISO-OSI and TCP/IP;
-- connection-oriented services and acknowledged services;
-- flow control: stop-and-wait and sliding-window (go-back-N and Selective Repeat);
-- standardization bodies.

* The Physical Level:
-- fundamentals of communication theory;
-- Fourier analysis and theorem of Nyquist and Shannon;
-- information representation (modulation);
-- transmission enemies;
-- transmission media;
-- the telephone system;
-- analog-to-digital conversion;
-- modem e xDSL;
-- wiring rules.

* The Data-Link Level:
-- aims and services;
-- framing;
-- error detection;
-- channel access methods;
-- PPP protocol.

* IEEE 802.X standards:
-- addressing;
-- topologies and protocols: Ethernet, fast Ethernet, gigabit Ethernet, 10 gigabit Ethernet
-- the MAC sub-layer: CSMA/CD, CSMA/CA;
-- the LLC sub-layer;
-- bridge, switch and spanning-tree;
-- wireless LAN: 802.11, 802.15.X, 802.16.

* The Network Level:
-- aims and services;
-- the IP protocol:
---- packet format;
---- address format and use, netmask, ARP and RARP;
---- router architecture and functions;
---- static routing and dynamic routing (distance vector, link state routing);
---- interior-gateway protocols (RIP, IGRP, EIGRP, OSPF)
---- exterior-gateway protocols (BGP);
---- Internet control management protocol (ICMP);
-- Virtual LAN.

* The Transport Level:
-- aims and services;
-- UDP;
-- TCP (header, 3-way handshaking, flow control, retransmission, congestion control);
-- firewall, NAT and PAT.

* The Application Level:
-- Virtual Private Network (VPN) and secure socket layer (SSL);
-- Domain Name Service (DNS);
-- dynamic host configuration protocol (DHCP);
-- the client/server model;
-- World Wide Web and HTTP;
-- electronic mail (SMTP, POP3 e IMAP);
-- other application protocols.

Module: Laboratorio
12 hours covering the following activities:

* use of tools for network analysis
* design of an enterprise IP network
* configuration of a firewall, NAT and PAT
* use of Telnet for the emulation of Internet clients
* installation of Web server
* installation of a virtual private network (VPN)

Assessment methods and criteria

Examination consists of a written test with questions about the theory and practice part of the class and numerical exercises.

A project can be developed in small groups of max 3 people.

The result of the project (max 3 points) is summed to the result of the written test.

Reference books
Author Title Publisher Year ISBN Note
Douglas Comer Internet e Reti di Calcolatori (Edizione 3) Pearson Education Italia 2003 8871921674
Douglas Comer Internetworking con TCP/IP (Vol. 1) (Edizione 5) Pearson Education 2006 8871922808
Fred Halsall Networking e Internet (Edizione 5) Pearson - Addison Wesley 2006 8871922786
Andrew S. Tanenbaum Reti di calcolatori (Edizione 4) Pearson - Prentice Hall 2003 8871921828
Peterson LL, Davie BS Reti di Calcolatori (Edizione 1) Apogeo 2004 8850321589
J.F. Kurose, K.W. Ross Reti di calcolatori e Internet - Un approccio top-down (Edizione 6) Pearson Education Italia 2013 9788871929385