I am new to SharePoint I've a requirement to build Sharepoint 2010 Portal with below specs. There would be 3 user group
B. Sales user
Marketing group will upload docs and sales group would view and download. There is a one to Many relationship between Sales:Marketing like Sales Group A should be allowed to view Marketing Group A ,B produced docs only All the users are AD users . Authentication Mode is NTLM ..
My question is what is the best place to create these groups and which is the best way to create this relationship between Sales and Marketing ..
Any advice would be helpful..