Satellite communications are at the very heart of the modern communications and their relevance is continually growing both concerning civil and military users, and considering commercial and research fields. Satellite communication has become a huge international commercial success involving budget of billion of Euros. More than 200 countries and territories rely on nearly 200 satellites for defense, direct broadcast, navigational, and mobile communications, not to mention data collection and faxing, via domestic, regional, and global links. To establish theses links so that communication assets in the networks could be effectively be operative, network, data link, and physical layers connectivity needs to be considered.