That you typed in the wrong user name that you're looking for, and/or that it doesn't exist.
Find your answer from skype manager user guide (check the link).
check
how to connect to another user using skype
NO
yup
To close a Skype account, a user is first required to remove all his personal information. By removing all the personal information in clicking save will mean that a given user will have deleted the account.
It means the user is currently away from their computer
A green bubble on Skype indicates that a user is online and available for communication. It means they are currently active on the platform and can receive messages or calls. If the bubble is gray, it typically means the user is offline or not active at the moment.
Skype I think
I believe Skype uses UDP or User Datagram Protocol.
tobuscus
User Name > Appdata > Roaming > Skype > Pictures This is for Skype Beta.