1. If your applications (server and client) should send/receive media data on RTP/UDP/TCP protocols then you need to use NWRenderer filter(for sending) and NWSource-Plus filter(for receiving).
You may use source code of NWServer and NWPlayer samples for developing of your own network applications.
NWServer is a sample application that demonstrates broadcasting media data to the network with the use of Elecard NWRenderer Filter.
If IP address of specific computer is set in "Group" field then broadcasting is unicast (media data may be received on that computer only).
If IP address of multicast group is set in "Group" field then broadcasting is multicast (media data may be received at any computer).
2. "Rtsp server" is the kind of Video On Demand (VOD) server. There is no such sample application in our SDK, but you can try develop such application by yourself.
The Elecard RTSP NetSource filter need to be used at client side to work with the VOD-server. Such feature is already implemented in NWPlayer sample application.
I dont know whether this is because you want to charge for supports service so you do not provide enough document for that !!
One month of the technical support (Standard program) is already included, so,feel free to contact to tsup(at)elecard.ru for consulting.