In message <Pine.LNX.4.60.0407270423300.1665@volatile.cableone.at>, Ingo Flasch berger writes:
also telnet is sometimes the last chance over "full" lines (encryption likes packetloss)
This doesn't make much sense. ssh and telnet both run over TCP; TCP handles any lost packets. If you're talking about IPsec, it was engineered to make each packet cryptographically independent. The only possible issue is that ssh packets are somewhat longer, thus rendering them slightly more expensive to transmit and slightly more liable to random bit errors. But the latter is very unlikely -- you were talking about congestion -- and the effect of the former is minimal compared to the speed of any likely line. --Steve Bellovin, http://www.research.att.com/~smb