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., Extending The Guarantee Of The Private Cloud Infrastructure Of The Secure Transmission System (Sam), Extending The Guarantee Of The Virtual Private Network Infrastructure Of The Secure Transmission System (Sam), Provision Of Maintenance Services And Technical Support Of The Secure Transmission (Sam) Equipment Of School Units And Dde)."/ Section 2 (Renewal Of Operating Licenses Of The Check Point Platform That Has The Y.Pai.Th.A.)