WAN and NAT

sendalot

Have some questions on WAN concepts.

1st, So, we have PAT and NAT. As Odom's book states, is PAT simply one of the ways of implementing NAT?

2nd, And for connecting WAN between locations,

(1) Leased Line: PSTN
(2) Packet Switching: ATM, Frame-Relay
(3) Circuit-Switch: ISDN.
(4) Cell Switching: ATM

Now if we have multiple or several virtual circutis, do I still use ISDN or switch to ATM?

Thanks.

DANMOH009

1st = Yes, Port address translation is a form of NAT.

2nd = Dont understand the question mate?

If your trying to say which is preferred then it depends on what type of set up you want, Packet Switched is a lot easier and discussed a lot more for studies for exam, IMO.

Corndork2

PAT or Port Address Translation is Reverse NAT.

Can I have more details on your 2nd question?

I'm assuming your asking what the best connection is to connect multiple sites to the same router.

As DAN said, Packet Switched is much easier, and is what the CCNA focuses on.

However, there are of course other ways to connect. You can do frame relay over ATM, you could go with ISDN, or you could do traditional IP links and run a routing protocol. There is also MPLS if you do not have IP connectivity on those links

networker050184

What do you mean that PAT is reverse NAT?

sendalot

Ya'll answered the question for me.
Thanks!

iamme4eva

....PAT is NAT Overload.