> How many types of sites are there in SCCM 2007 ?
Primary Site: Manages clients in well-connected networks.
Secondary site: Controls content distribution for clients in remote locations across links that have limited network bandwidth.
Parent Site: It is a site at the top level in the hierarchy & it does not come under any other sites.
Child Site: A site which comes under a site in a structure & gets information from that site (Higher Level) known as child site.

> How many types of sites are there in SCCM 2012 ?
1. CAS (Central administration site):- The central administration site coordinates inter site data
replication across the hierarchy by using Configuration Manager Database replication. It also enables
the administration of hierarchy-wide configurations for client agents, discovery, and other operations.
Use this site for all administration and reporting for the hierarchy.

2. Primary Site: Manages clients in well-connected networks.

3. Secondary site: Controls content distribution for clients in remote locations across links that have
limited network bandwidth.

> What is Site server, Site system & Site system Roles ?
Site Server: The site server is the computer on which you install Configuration Manager 2007 or 2012, and it hosts services required for Configuration Manager.

Site System: A site system is any computer running a supported version of Microsoft Windows or a shared folder that hosts one or more site system roles.

Site System Role: A site system role is a function required to be able to use Configuration Manager 2007 or to use a feature of Configuration Manager.

> What is Difference between Native mode and Mixed mode ?
Native Mode: More secure solution than mixed mode because it provides better authentication, encryption, and signing using standard industry security protocols. Supports Internet-based client management and Can integrate with existing PKI deployment.

Mixed Mode: Does not require a PKI deployment, so it has no external dependencies. Supports clients running SMS 2003. Supports WINS for the means by which clients locate their default management point if Active Directory and DNS cannot be used.

> What are the Discovery Methods & DDR available in SCCM 2007 & 2012 ?
Discovery Data Records:-
When Discovery runs, it creates discovery data records (DDRs). The information contained in a DDR varies depending upon the discovered resource. For example, it can include the NetBIOS name of a computer, the IP address and IP subnet of a computer or device, and the computer operating system name.
The approximate size of an individual DDR is 1 KB. Discovery Methods:-

1. Active Directory System Discovery – Discovers computers from the specified locations in Active Directory Domain Services.
2. Active Directory User Discovery - Discovers user accounts from the specified locations in Active Directory Domain Services.
3. Active Directory Security Group Discovery - Discovers security groups, including local, global, and universal groups from the specified locations in Active Directory Domain Services.
4. Active Directory System Group Discovery – Discovers additional information about previously discovered computers from the specified locations in Active Directory Domain Services. This information includes the OU and group membership of the computer. Active Directory System Group Discovery does not discover information about new resources that did not previously exist in the Configuration Manager site database.
5. Heartbeat Discovery – Used by active Configuration Manager clients to update their discovery records in the database. Because it is initiated by an active client, Heartbeat Discovery does not discover new resources.
6. Network Discovery – Searches your network infrastructure for network devices that have an IP address. This allows you to discover devices that might not be found by other discovery methods, including printers, routers, and bridges.
7. Forest Discovery – SCCM 2012 has a new discovery method which discovers other forest in the network.

> What are the Boundaries in SCCM ?
Configuration Manager Boundaries are defined in the Configuration Manager console and are defined by IP subnet, Active Directory site name, IPv6 Prefix, IP ranges. Boundaries are used to assign clients to a specific Configuration Manager 2007 site and should be unique to each site. When defining site boundaries for sites, ensure that you do not define the same boundary for more than one Configuration Manager 2007 site, doing so leads to a situation called overlapping site boundaries.

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