Per the subject line, could anyone recommend online sources of
information that would be helpful for a newbie (approx. CCNA level)
learning BGP?
Material that covers both common & best practices in a
Real-World-compatible manner would be especially helpful.
As suggested by others, the Cisco Press Internet Routing
Architectures is considered a must have, but there are some online
resources written by Avi Freedman which I have found useful - dive
on over to http://avi.freedman.net/.
There's articles Avi has written for Boardwatch, FAQs about multi-
homing, and the PPT foils from tutorials that Avi has given at
NANOG.
All are worth reading.
Still buy a copy of Internet Routing Architectures :-).
Mike