- A server that seems to support multi-threading, but returned status code is 200; http://ftp.free.org/mirrors/videolan/vlc/2.2.2/macosx/vlc-2.2.2.dmg
- A server that fails after a few tries http://www.youtube-mp3.org/
- Too many fails http://mobdisc.com/dw7b0a4ace/download.html