Exchange 2010 SP3 and RU11 update

Hi,
We have 2 Hub, 2 CAS , 2 Mailbox and 1 Public Folder server in my organisation.
OS version
CAS/HT/PF == Windows 2008 R2 Standard Edition
Mailbox -== Windows 2008 R2 Enterprise Edition
Exchange Version
CAS/HT/PF == Standard Edition
Mailbox = == Enterprise Edition
All servers have SP2 without any RU . Build Number 14.2.247.5

I am planning to upgrade them to SP3 RU11.
I have few questions

1)  Is SP3 and RU11 is same of all Exchange version ( Standard/Enterprise) or is it different for different Editions?
2) Can I do SP3 and RU11 update directly or do I need to update it first to any RU of SP2 first and then to SP3?
3) Can I install SP3 UR11 directly or do I need to update first to any RU of SP3?
3) Does RU11 for SP3 have all the fixes of previous updates or not?

Thanks
parv kumarengineerAsked:
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Manikandan NarayanswamySecurity Specialist & IBM Security GuardiumCommented:
Hi,

The RU update is same for all exchange version whether is standard/ enterprise. Before installing RU11 you have to update all Exchange Server to Sp3 . You can install RU 11 directly after installing Exchange 2010 Sp3 and RU 11 fixes an important issue where information store use to get crash. For more information on what RU 11 fixes refer the below link

http://blogs.technet.com/b/rmilne/archive/2015/09/15/exchange-2010-sp3-ru11-released.aspx
https://support.microsoft.com/en-us/kb/3078674
https://exchangeserverpro.com/exchange-server-2010-service-pack-3-update-rollup-11-released/

Thanks
Manikandan
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