root.hint & localhost.ddb

[mmarquez at mmer.inegi.gob.mx]

hi, very  sorry for this question. Very new on Bind9.1.2 and very 
poor english

where can i watch some root.hint & reverse mapping of the 
loopback address files so I can understand better their sintaxis?

and other question:

if my DNS is slave for domain.com, then the file 
/var/named/domain.com.slave gets populate by zone transfer??
I mean, no need of manual edit on this file?

thanks for your great patience! :)