(linux) tool to monitor "quality" of tcp connection?

(linux) tool to monitor "quality" of tcp connection? I am looking for a tool to monitor the quality of a TCP connection. I am trying to describe what I mean:
Asked by: Guest \| Views: 286

Total answers/comments: 2

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Guest [Entry]

"Just FYI..
Linux 'ping' has this option:

-s packetsize
Specifies the number of data bytes to be sent. The default is 56, which
translates into 64 ICMP data bytes
when combined with the 8 bytes of ICMP
header data."

Guest [Entry]

"In theory is possible to make ""passive"" monitor. That monitor application TCP data and ACK. and mean channel status as Ok when most Data has corresponding ACK. And only when Data is rare, use active test (ICMP ping, TCP ping).
But im dont know such software."