Wildcard mask practice?

drew2000

Just wondering if anyone knows of a site that has practice questions for wildcard masks, inverse masks, and/or VLSM questions?

SubnettingQuestions.Com and IP Subnet Practice are great for subnetting, but I am weak on these more advanced areas.

I think a practice engine would help me (and I haven't seen that much on the Boson CD that focuses on this subset of operations. (of course there are bigger scenario questions, but I need to get strong on these operations first).

Also, on an unrelated note, I just picked up the Lammle CCNA book to supplement my Cisco Press Odom ICND2 book. The Odom stuff has been a touch dry for me and I want to try something a little different.

Thanks,

Andrew

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Comments

drew2000

As a follow-up, I did find some good wildcard mask practice questions here:

Cisco CCNA Exercise

billyr

2 relatively easy ways to work out a wildcard mask.

1. Work out the subnet mask and subtract it from 255.255.255.255.

e.g 192.168.1.32/27
255.255.255.255
-255.255.255.224
=0.0.0.31

2. Work out your increment size and take away 1.

e.g 192.168.10.16/28
/28 mask = increments of 16.
16-1 = 15, inverse mask = 0.0.0.15.

drew2000

OMG Option #1 is super easy, is that a popular one?

I have been working with Option 2 a little, just need to practice.

Andrew

drew2000

BTW, it's funny how our certs are almost the same! I usually see people with SOME but hardly ever ALL (except for ICND2).

Drew