Packages available for different FreeBSD versions

[Chris Stankevitz]

Chuck Swiger wrote:
> If you just want security updates and no other changes, you'd update 
> against RELENG_7_2 instead.

Here are you referring only to security updates to the "core OS" and not 
applications in "ports" such as Firefox?

> In the BSDs, the baseline or core OS is separate 
> from installed ports or packages, and is updated separately from them.

What's an example of something that is in "the core OS" and not in the 
"ports"?  GCC?  the shells?  the kernel?

Thank you,

Chris