What is the difference between a Distribution group and Security Group.

Hi,

What is the Difference between a Security Group and Distribution group.

Please dont send me to some links .Need some easy understandable explanation.
Confused with these groups.
Security Global,Security Universal,Security Mail enabled,Security Domain Local
Distribution Global,DistributionUniversal,Distribution Mail enabled,Distribution Domain Local

What are all these and Can we add a security group to a distribution group and vise versa
Can we add a Security group as a member of a Distribution and vise versa

Regards
SharathStart Free Trial