How to have a domain redirect to a subdirectory?

Question

Using only DNS, how can I have http://www.example.com/ either redirect or resolve to http://www.anotherdomain.com/example ?

UPDATE:

Since it's been mentioned below that DNS cannot be used, what's the next best alternative (minimize load on server and provides the fastest redirect experience for the user) ?

Answer 1

You can't. DNS doesn't handle URLs, just maps names to IPs.

URLs aren't part of DNS, only domain names are.

Answer 2

Just as Tim Howland said, you can't. You need to use something like the URL rewrite module for Apache or a redirect page (both on example.com).