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 physical 
 
Necessary basics to understand networking
 
 networks 
 
Here you'll learn more about functions of dedicated networks
 
 protocol layering 
 
A stack of protocols, each one build upon the one below
 
 load control 
 
If you want to know more about congestion or flow control
 
 error control 
 
Transmission errors and how protocols deal with them
 
 connection management 
 
Learn how do build up and tear down connections
 
 multicast 
 
Topics related to group communication
 
 ICMP 
 
When something unexpected occurs or you want to test the Internet... let's see how ICMP supports you
 
 UDP 
 
The connectionless transport protocol of the Internet protocol suite
 
 TCP 
 
A connection-oriented, reliable transport service on top of IP
 
 IP 
 
Learn how the Internet Protocol works!
 
 RTP 
 
Here you'll find topics around the multimedia transport over the internet!
 
 IPv6 
 
 
 ethernet 
 
Learn more about the most important LAN protocol
 
 LAN mechanisms 
 
Special aspects of Local Area Networks
 
 wireless LAN 
 
Topics around wireless local area communication
 
 DNS 
 
Translation between hostnames and IP addresses is the main task of DNS. See how this works!
 
 SIP 
 
Establishing voice calls over the internet and more ...
 
 multimedia 
 
VoIP, Video on Demand and other multimedia applications over the Internet!
 
 video in internet 
 
Discover how different parameters influence the quality of the video and audio transmission and presentation.
 
 security 
 
This is about internet security - including firewalls, VPN, NAT, ...