need notes

in CCNA & CCENT
hi everybody
i've just finished my CCNA theory portion n now attemting my labworks,
but i haven't got clear idea of VLAN,WAN and NAT
i wonder if anybody has got good notes on these topics that i can get thru email.
i'll be grateful to u.
thankx
i've just finished my CCNA theory portion n now attemting my labworks,
but i haven't got clear idea of VLAN,WAN and NAT

i wonder if anybody has got good notes on these topics that i can get thru email.
i'll be grateful to u.
thankx

Comments
Scroll down to the Cisco section.
i need more than that,that's not enough.
Anyway thankx for suggestion.
for ccna ,just using handsnotes provided by college.
http://www.amazon.com/CCNA-Certified-Network-Associate-Guide/dp/0782141676