Question 490
A numbered IPv4 ACL uses source address 192.0.2.0 with wildcard 0.0.0.254. Which source addresses in the 192.0.2.0/24 would match, assuming no other conditions?
Explanation
Correct Answer
In an IOS wildcard, one bits ignore a corresponding address bit and zero bits must match it. 0.0.0.254 ignores bits 1–7 but tests bit 0.
Incorrect Answers
That would require ignoring all eight final-octet bits with wildcard 0.0.0.255.
Odd addresses have the low bit set to one, which conflicts with the fixed zero bit.
IOS wildcard patterns can be noncontiguous and select multiple source values.