Jens Helge Reelfs

Teaching

As Teaching Assistant

Mini Internet Platform slides (DE)
BTU
Used within our Summer 2022, 2021 and 2020 lectures.
- Multi-tenant docker environment
- Configure and run own networks and ASes
- Manage AS interconnections - direct peering & IXPs
- Interpret observed BGP looking glass and netflow information
Created by the Networked Systems Group from ETHZ, code available on GitHub
Internet Measurements and Forensics exercise Awarded '22
Info & BTU Module · Summer 2022, Summer 2021 Summer 2020
- Measurement Use-Case: DNS and Security
- Measuring the Internet
- Internet control plane analysis and robustness
- Reachability and Security
- Security infrastructure & network forensics
- 2021 Internet Asynchronous Path & Latency Measurement Project with DACS Group, UTwente lab
- since 2021 How to read a paper? - Writing a Public Media Article about Measurement Research mini-seminar
Introductory Seminar: Trends in Communication Systems seminar
Info & BTU Module (DE) · Winter 2021, Winter 2020, Winter 2019
- Various topics in Internet, Computer Networking
- Learning how to disseminate scientific work
- Compile a scientific summary of given topic
Network Architectures and Performance lecture* exercise
Info, RWTH Module · Summer 2018, Summer 2017
- Core Internet and critical services
- Transport & Datacenter Transport
- Internet Measurements

As Teaching Assistant

Internet - Functionality, Protocols, Applications exercise Awarded '22
Info & BTU Module · Summer 2020
- Internet economics
- Internet protocol stack (IPv4, CIDR, IPv6, DHCP, BGP, TCP, UDP, DNS, HTTP)
- Quality of Service (types, mechanisms, Intserv, Diffserv)
- Fundamentals of multimedia communication
- Datacenter networking
- Content distribution networks
Advanced Internet Technology exercise
Info & RWTH Module · Winter 2019, Winter 2015
- Peer-to-Peer networks: unstructured P2P systems, general network topologies, structured P2P systems, P2P applications
- Cloud computing: cloud and distributed data storage
- Software-Defined Networking (SDN)
- Security: Blockchain, TLS
- (Wireless) Sensor networks, The Internet of Things (IoT)
Introduction to Computer Networks Networking Basics exerxice lab

Building Communication Protocols python, C++
Sequencing, Buffering
Reliable/Unreliable Transport

Datenkommunikation und Sicherheit Networking Basics exercise
Info, RWTH Module · Summer 2017
- Communication services, layer models, protocols
- Physical basics of transmission, Error handling and medium access
- Internet Protocol (IP) and Routing: Connecting remote hosts
- Transmission Control Protocol (TCP): Connecting applications
- Security: Cryptographic primitives, IPsec, SSL/TLS
Communication Systems Lab lecture lab
Info, RWTH Module · Winter 2016
- Network programming & analysis on Linux
- Programming on Android
- Arduino devices and sensors
(Pro-)Seminars on Advanced and Mobile Internet Technology seminar
Info, RWTH Module · Summer / Winter · 2015 - 2019
- How to do a literature survey?
- How to write scientific papers? Which conventions to follow, how to e.g. cite literature?
- How to give a good presentation?