Announcement Of An Open Electronic Competition Above The Limits In Euros (€) "For The Selection Of Contractor/S, For The Conclusion Of Service Contracts With It Objects (Extension Of Guarantee Of Private Cloud Infrastructure Of The University Of Athens, Renewal Of Operating Licenses Of The Check Point Platform That Has The Y.Pai.Th.A., Extension Of The Guarantee Of The Private Cloud Infrastructure Of The Secure Transmission System (Sam), Extension Of The Guarantee Of The Virtual Private Network Of The Secure Transmission System (Sam), Provision Of Maintenance Services And Technical Support Of The Secure Transmission (Sam) Equipment Of School Units And Dte)."/ Section 3 (Extension Of The Guarantee Of The Private Cloud Infrastructure Of The Secure Transmission System) Transmission (Sam))