Class A 10.X.X.X/8 (can configure IP address starting at 8th bit)
Class B 172.16.X.X/12
Class C 192.168.X.X/16 ( can go /17 /18 /19 /20 .... /24 /25 ...)
Subnet Mask
11111111.1111111.1111111.X(/24 => starting at X the 24th bit, which contains 2^8 (256) possibilities of IP address it is also equivalent of saying subnet mask of 255.255.255.0)
11111111.1111111.1111111.1Y(/25 => starting at Y the 25th bit, which contains 2^7 (128)possibilities of IP address it is also equivalent of saying subnet mask of 255.255.255.128)
/24, /25 is also known as CIDR notation
No comments:
Post a Comment