Updating from 11.2 to 11.3 on a headless machine

[Joe A.]

Hello...

I have a machine that I moved into a headless with no keyboard 
role and now I wish to update it to 11.3 from 11.2-RELEASE-p9.

Since it's headless, and it seems that FreeBSD update works on
a headless machine, I plan to use it as outlined in the 
handbook in chapter 23.2.

First question: am I correct in understanding that FreeBSD update
will work on an headless machine, as distinct from svnlite and a 
build from source?

In section 23.2.3. Performing Major and Minor Version Upgrades,
this appears: freebsd-update -r 9.1-RELEASE upgrade. On my 
desktop with a monitor and keyboard, I use snvlite; so when 
moving between major and minor upgrades, I use svnlite switch.

Second question: is it the case that 'freebsd-update -r'  
is a substitute for 'snvlite switch'? 

Thanks for any replies, and best regards,

Joe