Jens Helge Reelfs

Sometimes,
it is making others understand the big picture.
Digging deeper ever since.

Teaching

As Teaching Assistant

Mini Internet Platform slides (DE)
Used within both of our Summer 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
Originally created by the Networked Systems Group from ETHZ, code available on GitHub
Internet Measurements and Forensics exercise
Info & BTU Module · 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
- New'21 Internet Asynchronous Path & Latency Measurement Project with DACS Group, UTwente lab
- New'21 How to read a paper? - Writing a Public Media Article about Measurement Research mini-seminar
Internet - Functionality, Protocols, Applications exercise
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
Introduction to Computer Networks Networking Basics exerxice lab

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

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

As Teaching Assistant

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)
Network Architectures and Performance lecture* exercise
Info, RWTH Module · Summer 2018, Summer 2017
- Core Internet and critical services
- Transport & Datacenter Transport
- Internet Measurements
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?