Understanding QNetworkConfigurationManager

[TheIndependentAquarius]

QNetworkConfigurationManager manager;
 
if (manager.capabilities() & QNetworkConfigurationManager::NetworkSessionRequired) 
{
}

QNetworkConfigurationManager manager;
    
if (manager.capabilities() & QNetworkConfigurationManager::NetworkSessionRequired) 
{
}

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Now, when I looked up the documentation for capabilities(), all I got was this:

Returns the capabilities supported by the current platform.

from: http://doc.qt.nokia.com/stable/qnetw...l#capabilities

That is very vague, "which" capabilities exactly are we talking about here?