Client manageability in SCCM 2012

Question

Hi All
I am Planning to have test SCCM 2012 environment and for that i need few architecture suggestions. Kindly suggest me on the same so that i can implement an effective infrastructure design.
Total Number of Clients to Support - 58000
First Draft version of design consist of 1 Primary Site and 3 Seconadry Sites. Kindly confirm if 1 primary and 3 secondary site will be able to cater 58000 clients. As per my understanding secondary site supports 5000 clients and Primary sites can support
25000 Clients.
Also confirm that clients under secondary site will be considered as client of primary site (linit of 25000) or seperately counted (25k +5K).
Regards
Regards Suresh

Answer 1

Kent's book talks about a limitation of 50 000 when using a local SQL server. 
Kent's book does state this. 
Note that the Technet article states the following (from the link supplied by John):
Client group 1 includes Windows Server and client.
Site type
Configuration Manager version
Client group 1
Client group 2
Client group 3
Stand-alone primary site, with a local site database, or a remote site database
System Center 2012 Configuration Manager with no service pack 1
100,000
50,000 4
25,000
System Center 2012 Configuration Manager with SP1
100,000 2
50,000 4
25,000
System Center 2012 R2 Configuration Manager
100,000 2
50,000 4
25,000
Child primary site with a local site database
System Center 2012 Configuration Manager with no service pack 1
50,000
50,000 4
25,000
System Center 2012 Configuration Manager with SP1
50,000 2
50,000 4
25,000
System Center 2012 R2 Configuration Manager
50,000 2
50,000 4
25,000
Child primary site with a remote site database
System Center 2012 Configuration Manager with no service pack 1
100,000
50,000 4
25,000
System Center 2012 Configuration Manager with SP1
100,000 2, 3
50,000 4
25,000
System Center 2012 R2 Configuration Manager
100,000 2, 3
50,000 4
25,000
Secondary site
Any version 1
5,000 5
Cheers
Paul | sccmentor.wordpress.com