NAT vs PAT?

From: Hank Nussbacher (hank@att.net.il)
Date: Mon Nov 13 2000 - 03:45:00 EST

What would be good reasons not to use PAT and stick to just NAT?
I have reviewed:
http://www.cisco.com/warp/customer/701/60.html
http://www.cisco.com/warp/customer/458/41.html

There is the 4000 connection limit listed on those pages. Cisco also lists:

Although the following traffic types carry IP addresses in the
           application data stream, they are supported by Cisco IOS NAT:
        ICMP
        FTP (including PORT & PASV commands)
        NetBIOS over TCP/IP (datagram and name services only, session
service support coming soon)
        Progressive Networks' RealAudio
        White Pines' CuSeeMe
        Xing Technologies' StreamWorks
        DNS "A" and "PTR" queries
        H.323 [12.0(1)/12.0(1)T and later]
        NetMeeting [12.0(1)/12.0(1)T and later]
        VDOLive [11.3(4)/11.3(4)T and later]
        Vxtreme [11.3(4)/11.3(4)T and later]

Does this mean PAT can also handle these applications, or is it limited
only to NAT?

Thanks,
Hank

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