libqt5network5-dbgsym 5.5.1+dfsg-6ubuntu4 (amd64 binary) in ubuntu xenial

 Qt is a cross-platform C++ application framework. Qt's primary feature
 is its rich set of widgets that provide standard GUI functionality.
 .
 The QtNetwork module offers classes that allow you to write TCP/IP clients and
 servers. It provides classes to make network programming easier and portable.