Subject » BMEVIHIAB01
Communication Networks I.
Kommunikációs hálózatok 1
A tantárgyleírás hatályossága
Hatályosság kezdete:
2026. March 21.
Hatályosság vége:
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| Subject name (Hungarian, English) |
Kommunikációs hálózatok 1
Communication Networks I.
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| Subject code | BMEVIHIAB01 | ||||||||||||
| Subject type | — | ||||||||||||
| Training Level | — | ||||||||||||
| Course types and hours (weekly/semester) |
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| Assessment type | félévközi érdemjegy | ||||||||||||
| Credits | 4 | ||||||||||||
| Subject coordinator |
Dr. Lencse Gábor
contact:
simon.vilmos@vik.bme.hu
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| Responsible department |
Hálózati Rendszerek és Szolgáltatások Tanszék
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| Faculty | Villamosmérnöki és Informatikai Kar | ||||||||||||
| Subject website | — | ||||||||||||
| Primary curriculum type | — | ||||||||||||
| Direct prerequisites – Strong prerequisite | none | ||||||||||||
| Direct prerequisites – Weak prerequisite | none | ||||||||||||
| Direct prerequisites – Parallel prerequisite | none | ||||||||||||
| Direct prerequisites – Milestone prerequisite | none | ||||||||||||
| Direct prerequisites – Exclusion | none |
Objectives
Programme
The main goal of this course is to introduce the basic paradigms, architectures and protocols of communication networks to students. The course follows a top-down approach. The students will get familiar with the basic paradigms, architectures and protocols of communication networks through the transport, network, data link, and physical layers. Topics, among others, include the main application layer protocols like DNS and HTTP, congestion control solutions, UDP and TCP protocols, routing schemes, IPv4 and IPv6, medium access, and the essentials of physical layer techniques. Laboratory experiments help students to deepen their understanding of the essential characteristics of the most important building blocks of IP-based communication networks.
Students who successfully accomplish the course will understand
- essentials of IP-based communication networks from the application to the physical layers,
- routing techniques and protocols,
- IPv4 and IPv6 network layer solutions,
- congestion control paradigms,
- UDP and TCP mechanisms and TCP session management,
No objectives provided.
Learning outcomes
Ez a tantárgy a KKK rendeletben meghatározott, következő kompetenciák fejlesztését szolgálja:
Knowledge
No learning outcomes recorded.
Skills
No learning outcomes recorded.
Attitudes
No learning outcomes recorded.
Autonomy and responsibility
No learning outcomes recorded.
Oktatási módszertan
1.hét
Introduction to networked systems and networking techniques. History of the
Internet and its general architecture. Overview of applications and services (e.g.
web, file transmission, e-mail, P2P, multi-media streaming). Requirements of
communication, QoS/QoE basics, packet loss and delay.
2. Hét
Protocol architectures and the reference models: ISO/OSI, TCP/IP, circuit
switching, packet switching, addressing.
3. hét
Network applications 1 - Infrastructure services: DNS (functionalities,
requirements, zone, servers, operation, messages). Dynamic Host Configuration
Protocol. Text and file transmission: Telnet, File Transfer Protocol.
4. hét
Network applications 2 - Mailing systems: Simple Mail Transfer Protocol, Post
Office Protocol, Internet Message Access Protocol. Web solutions: Hypertext
Transfer Protocol, persistent and non-persistent operation, message formats,
commands, headers.
5. hét
Transport layer: general characteristics, goals, sockets, socket types, User
Datagram Protocol (ports, headers), Congestion control: goals of congestion
control, congestion control vs. flow control, general solutions and mechanisms,
stop-and-wait operation.
6. hét
Transmission Control Protocol (main characteristics and operation, segment
format, session establishment).
7. hét
Transmission Control Protocol (retransmission cases, fast retransmit, timeout
interval calculation, AIMD, Slow Start).
8. hét
Network layer and Internet Protocol (IP): IP functionalities, characteristics,
addressing (classes, public/private addresses), Classless Inter-domain Routing,
IPv4, IPv4 header structure
9. hét
Routing: the function itself, bridging vs. routing, routing tables, distance
vector and link-state based protocols. Hierarchical routing, autonomous
systems, multicast routing basics.
10.hét
IP routing (RIP, OSPF, BGP), Address Resolution Protocol, IP fragmentation, IP signaling
and management (ICMP and IGMP).
11. hét
IPv6: motivations - problems and issues with IPv4, IPv6 header structure, address
autoconfiguration, IPv6 routing, IPv6 migration, IPv4 and IPv6 in
practice, addressing, network aggregation, IPv6 addresses canonical format, EIU-64
algorithm.
12.hét
Data link layer and LANs: principles behind data link layer services, error
detection, correction, sharing a broadcast channel, multiple access, link layer
addressing, Ethernet.
13.hét
Data link layer and LANs: Wi-Fi and other instantiation and implementation of
link layer technologies, brief introduction to physical layer (major functions
and services, encoding, transmission, reception and decoding).
14. hét
Outlook: internet of things, vehicular communication
Laboratories:
Laboratory #1: TCP/IP protocol stack (1x4 hours)
Wireshark (basic usage, capture filter, display filter; Ethernet, IP, ICMP,
TCP, UDP headers). ARP: Request, Reply, Probe and Announcement. DHCP: Release,
Ack, Discover, Offer, Request, Ack. ping and traceroute. TCP session creation
and termination. TCP session count. TCP congestion control. TCP options.
Laboratory #2: Network applications (1x4 hours)
DNS: „A", „PTR" and „AAAA" records. SMTP: manual e-mail sending (HELO, MAIL
FROM, RCPT TO, DATA (From:, To:, Subject:, Date: and payload), QUIT), envelope
sender/recipient header fields. POP3: USER, PASS, STAT, LIST, RETR, DELE, RSET,
QUIT commands. FTP: client, active and passive mode, BIN vs ASCII file
transfer, FTP PASV mode with telnet. HTTP: GET, 1.0 vs. 1.1. SSH and SCP: key
generation, login, file transfer.
Laboratory #3: IPv6 operation and IPv6 migration techniques (1x4 hours)
Stateless address autoconfiguration (SLAAC) (neighbor solicitation, router
solicitation, router advertisement messages, link-local and global unicast addresses,
EUI-64). DNS64: common DNS64 server setup. Linux DNS64 server configuration.
Common NAT64 Gateway to reach IPv4 only servers: first with HTTP, then with FTP
passive and active mode. Further application tests (SMTP, POP3). Traceroute experiments.
NAT64 gateway usage on local Linux (TAYGA + IPTABLES already configured).
Tanulástámogató anyagok
Online források
Course website: https://moodle.hit.bme.hu/ ; References:; • James F. Kurose - Keith W. Ross: Számítógép-hálózatok működése,; Panem, 2008 (ISBN 978-963-5454-98-3).; • Andrew S. Tannenbaum: Számítógéphálózatok, Panem, 2004; (ISBN 978-963-5453-84-1).; • Lencse Gábor: Számítógép hálózatok, Universitas-Győr; Nonprofit Kft, Győr, 2008 (ISBN 978-903-9819-15-3).; • Lencse Gábor, Répás Sándor, Arató András: IPv6 és; bevezetését támogató technológiák, HunNet-Média Kft, Budapest, 2015, (ISBN:; 978-963-12-3272-1), DOI: 10.18660/ipv6-b1.2015.9.1, http://ipv6ready.hu/konyv/
Recommended preliminary knowledge for completing the subject
Knowledge type competencies
(azon előzetes ismeretek összessége, amelyek megléte nem kötelező, de a tantárgy eredményes teljesítését nagyban elősegíti)
nincs
Skill type competencies
(azon előzetes képességek és készségek összessége, amelyek megléte nem kötelező, de a tantárgy eredményes teljesítését nagyban elősegíti)
nincs
Recommended (non-compulsory) preliminary competencies
(azon ajánlott (nem kötelező) előzetesen megszerzendő kompetenciák összessége, amelyek jelentősen hozzájárulnak a tantárgy eredményes teljesítéséhez)
nincs
General rules
Requirements:
Requirements
Laboratories: mandatory to have all 3 laboratories successfully completed,
only 1 laboratory can be repeated.
Midterm test: successful test with at least 50%. No exam.
Grade calculation: 66% test points, 34% laboratory points.
Additional possibilities:
Repetititon
1 laboratory can be repeated (independently of the reason of the failure
/failed entry test or failed laboratory tasks/).
Midterm test can be repeated once during the repetition week.
Assessment methods
In-term assessments
No detailed assessments provided.
Weight of in-term assessments
No weights provided.
Exam-period assessments
No detailed assessments provided.
Weight of exam elements
No weights provided.
Grade calculation
No grade thresholds provided.
Attendance requirements
No attendance requirements provided.
Rules for retake and resubmission
Not provided.
Short description
Not provided.
Detailed description
Not provided.
Recommended courses
VIMIAA01 Digitális technika, VIHIAB00 Kódolástechnika (párhuzamos felvételre), VIHIAA00 Számítógép-architektúrák.
Workload to complete the subject
No workload breakdown provided.
Validity of subject requirements
Requirements valid from:
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Requirements valid until:
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Curriculum placement
No curriculum placements recorded for this subject version.