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i was reading about standard ACL and came across that a standard ACL wildcard mask is optional? my understanding tells me that this could be true for classful IP. appreciate if someone can expound on this topic. below is an excerpt from what i've read. thanks in advance!
source-wildcard (Optional) Wildcard bits to be applied to the source.
There are 2 ways to specify the source wildcard:
- Use a 32-bit quantity in 4-part, dotted-decimal format
- use the keyword any as an abbreviation for a source and
source-wildcard of 0.0.0.0 255.255.255.255
Correct I saw that I forgot the keyword host..
Regarding your question, again if you are using a subnet ( not a host) you will need to use the wildcard. The wildcard is optional because you can use instead the keyword hos ( 1 ip address) t or the keywork any ( any ip address)
Do you see it now?
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