In live SharePoint Env, we have deployed custom master page. when user tries to login by inserting correct credentials,login prompts 5-6 times before home page loads but in development env we don't have such problem. Is it because of Custom master page or Browser (IE8) or something related to network?
if you are using windows authentication, add your SharePoint url to an IE security zone that is configured to automatically logon with current windows user.
if you open office document in client application or use windows explorer view, you may have additional trouble because they use WebDav protocol, and WebDav use WinHTTP, which does not check IE security zone to determine if it will auto logon: http://support.microsoft.com/kb/943280/en-us