Workgroup or Domain, which is best?

[hypaspid]

I am in network (in a workgroup without a domain and without a server) of about 10 computers and of late security has become an issue. I was thinking of installing a network server to manage access to network resources, do i need a domain or the workgroup without a domain can be managed using the active directory in windows server?

 

[Nodsu]

You need to set up a domain for central management.. Mind you, you can use Samba and a free operating system to set up a NT style domain for free.

How is security an issue? All your users have the same username? Or everyone knows the admin password?