This course introduces the mathematical foundations of modern communication networks, with particular emphasis on the architecture of Internet. Inside the general framework of the Bachelor degree in “Electronics and Communication Engineering” this is the fundamental course in the area of telecommunications, giving the basic foundations of both the physical and network layer of modern telecommunication systems. The course is fully given in English.

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 - ability to design and plan an IP network - ability to configure an IP network and its routing

This course has tas prerequisites a good understanding of the mathematical topics presented in the first year courses.

• 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 (14h) • Routing in the Internet: IP addressing, routing tables, NAT (12h) • Internet transport layer protocols (TCP, UDP) (6h) • Internet application layer protocols (SMTP, POP and IMAP, HTTP, DNS) (4h)

Theoretical lectures will be complemented by practice classes, which will be devoted to the solution of numerical problems on the course main topics.

Books suggested as text reference: • A.Pattavina: “Reti di telecomunicazioni", Mc.Graw-Hill (in Italian) • J.F. Kurose, K.W. Ross: 'Computer Networking: A Top-Down Approach', Pearson (English) • J.F. Kurose, K.W. Ross: 'Reti di calcolatori e Internet: un approccio top-down', Pearson Italia (in Italian) 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)

Slides; Libro di testo; Libro di esercitazione; Esercitazioni di laboratorio; Video lezioni dell’anno corrente; Video lezioni tratte da anni precedenti;

E' possibile sostenere l’esame in anticipo rispetto all’acquisizione della frequenza

Modalità di esame: Prova scritta (in aula); Elaborato progettuale in gruppo;

Exam: Written test; Group project;

... STANDARD EXAM ADMINISTRATION: The exam will be written. Oral part is optional, according to the rules described below. The exam is based on: - 2-3 numerical exercises, similar to those that will be solved during the course. - 2-3 theoretical questions, requiring a free-text answer. The exam will last two hours and it will be scored on a full scale up to 30. The evaluation of the written exam is based on the correct development of the proposed exercises from the description of the symbolic-formula solutions up to the numerical results. The theoretical questions will be judged according to the completeness of the answers, but also on the ability of the students to reply in a concise way. This written exam is a “closed-book exam”. During the written exam the student can use only a pocket calculator (NO laptop, tablets etc. Any type of cellphone should be switched OFF). No other technical material is allowed (thus no books, handouts, old exercises, etc). The students who will get a score above 15/30 at the written exam can ask for an optional oral exam, where the questions will mostly regard the theoretical aspects of the course. The optional oral exam is always organized a few days after the written exams. The oral examination score ranges from -3 to +3 points that are added to the result of the written exam. EXTRAORDINARY EXAM ADMINISTRATION IN THE CASE OF COVID-19 CONTAINMENT MEASURES: The exam will consist of a written test and of a MANDATORY oral examination. The exam will be administered as follows: 1) a multiple choice test will be erogated through the "Exam" platform, with integration of automatic proctoring mechanisms (Respondus). The test may include both theoretical questions and short numerical exercises. The test score ranges from 0 to 30 cum laude. Students who receive a score >=18 will be allowed to take the oral examination. Students who receive a score lower than 18 will NOT be allowed to take the oral examination and MUST retry the multiple choice test in a successive exam call. 2) The oral examination will last approximately 30 mins and will include both theoretical questions and numerical exercises. The oral examination score ranges from 0 to 30 cum laude. It will be erogated using either the BBB platform or any other videoconferencing application previously agreed with the candidate. The schedule of the oral examinations will be made available after the publication of the results of the multiple choice test. 3) The final score will be computed according to this formula: round(0.2*(test score)+0.8*(oral examination score)).

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.