IPX dialout access list question

From: Michael Snyder (msnyder@xxxxxxx)
Date: Sat Aug 18 2001 - 12:35:57 GMT-3


   
I found the following in Cisco IOS Dial Solutions, Chapter 42, pg 1099

It's a access list, I assume to filter out rip and sap updates from bringing
up the dialer. I'll number the lines because I have question at the end of
the list

1 access-list 901 deny -1 FFFFFFFF 452
2 access-list 901 deny -1 FFFFFFFF 453
3 access-list 901 deny -1 FFFFFFFF 457
4 access-list 901 deny -1 FFFFFFFF 0 FFFFFFFF 452
5 access-list 901 deny -1 FFFFFFFF 0 FFFFFFFF 453
6 access-list 901 deny -1 FFFFFFFF 0 FFFFFFFF 457
7 access-list 901 permit -1

My question is this, doesn't line 4 do everything line 1 does?

Also, What's the third port number? I assume two of these filter out ipx rip
broadcasts and ipx sap broadcasts.
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