Suppose I was given this IP gateway :
199.141.27.129/26
How can I tell the subnet mask from the /26? Sometimes I notice this, for example : IP 150.10.10.10 with a mask 255.255.252.0 can be written 150.10.10.10/22
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The number (26) is the number of bits in the mask:
11111111.11111111.11111111.11000000
Convert it back to decimal:
255.255.255.192
Ron Maupin
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AH, I see, so the number(x) means there will be x-consecutive-bits in a 32 bits string correct? – NeedAnswers Oct 15 '14 at 15:24
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1Correct! An IP address is 32 bits long, and so is a mask. – Ron Maupin Oct 15 '14 at 15:30