Talk:Wildcard mask

i want to ask you that if why we have the wildcard mask in the ospf .is it use any security.

The wildcard mask is a legacy technology from the days when ACLs were in common use and NAND gates were faster and easier to program than AND gates. You can read several more detailed explanations at: https://learningnetwork.cisco.com/thread/3194.--49oxen (talk) 19:50, 19 November 2010 (UTC)

Should the following line have 255 instead of 254 for the mask showing an octet in which we do not care the value? "On the other hand, a 254 indicates that you don't care what the corresponding octet is in the network except for the host(255) bit." What is the meaning of "...except for the host(255) bit."? If it means that using 255 in the wildcard mask for the last octet means any host on the a.b.c.0 to a.b.c.255 network, then 255 should be used. 254 is used earlier to show an rare (I assume) example of only even hosts being matched. This is good. However, I believe 255 is intended in the "On the other hand" sentence. Is this correct, or am I misunderstanding something? Thank you, 4ProfDigory (talk) 18:10, 9 September 2015 (UTC) יעעעעעעעעעעע — Preceding unsigned comment added by 62.56.150.186 (talk) 13:24, 17 March 2024 (UTC)