Oh, no, it's useful for what it's designed for: to protect communication between two computers. If I have IPSEC protecting the connection between my desktop and

Oh, no, it's useful for what it's designed for: to protect communication between two computers. If I have IPSEC protecting the connection between my desktop and my internal DNS server, and between my desktop and my database server, I know that connection to my database server is protected by IPSEC. It doesn't protect the mapping between a computer name and a IP address, but that's not its job.