This course is an introductory class to computer networks, focused specifically on the architecture of the Internet. All the protocol layers are covered, starting from the MAC layer up to application layer.

The most important learning outcomes are: - knowledge of the general concepts of communication networks: network topologies, switching techniques (circuit and packet), multiplexing and multiple access techniques, service models (client-server, peer-to-peer), layered protocol architectures, traffic characterization, QoS, error recovery - knowledge of Ethernet and Wi-Fi protocols - knowledge of network and transport protocols in the Internet: IP, TCP/UDP - knowledge of the routing in IP networks and of related services: NAT, DHCP. - knowledge of the support of multimedia networking - ability in evaluating the behavior and the performance of the adopted protocols - ability to design and plan an IP network - ability to configure an IP network in terms of addressing and routing

This course has no specific prerequisite.

- General concepts of computer networks: network classification based on the covered area, network topologies, switching techniques (circuit and packet), multiplexing and multiple access techniques, service models (client-server, peer-to-peer), layered protocol architectures, traffic characterization and QoS requirements (10h) - Error recovery and flow control techniques: ARQ window protocols, data-link layer protocols (4h) - Ethernet and Wi-Fi networks (10h) - Network protocols in the Internet: IPv4 and ICMP, IP addressing, ARP (6h) - Routing in the Internet: IP addressing, routing tables, NAT, RIP, OSPF, BGP (8h) - Internet transport layer protocols (TCP, UDP) (6h) - Internet application layer protocols (SMTP, POP and IMAP, HTTP, DNS, peer-to-peer) (6h) - Wireless networks: WiFi and cellular (6h) - Multimedia networking (4h)

Theoretical lectures will be complemented by practice classes, which will be devoted to network design problems and to the detailed evaluation of the protocol behavior. All the professor's notes on the electronic whiteboard will be made available in the Didattica portal.

The course will follow strictly the textbook: - J.F. Kurose, K.W. Ross: 'Computer Networking: A Top-Down Approach',VI edition, Pearson (English), The slides are taken from: http://www-net.cs.umass.edu/kurose- ross-ppt-6e/ The exercises on network protocols and on the design of IP networks will follow: - A.Bianco, C.Casetti, P.Giaccone, Esercitazioni di reti telematiche, CLUT (in Italian)

Modalità di esame: Prova scritta (in aula);

Exam: Written test;

... The exam for the module Communication Network is written and "closed-book"; it lasts 70 minutes. It is based on three questions with open answers, covering all the topics covered in the class. One question will be devoted to evaluate the different abilities detailed above in the design and evaluation of communication networks, and two other questions to evaluate the expected knowledge detailed above on the network protocols adopted in the Internet. The grade for the written exam referred to the module Communication Network will be in the range [18-33]. The final grade will be the average of the two modules, i.e.: round(0.5*(grade(Communication network)+grade(Digital transmission))

Gli studenti e le studentesse con disabilità o con Disturbi Specifici di Apprendimento (DSA), oltre alla segnalazione tramite procedura informatizzata, sono invitati a comunicare anche direttamente al/la docente titolare dell'insegnamento, con un preavviso non inferiore ad una settimana dall'avvio della sessione d'esame, gli strumenti compensativi concordati con l'Unità Special Needs, al fine di permettere al/la docente la declinazione più idonea in riferimento alla specifica tipologia di esame.