Aug 16, 2003 · 255.255.255.248 : 8192 (8190) 6 /30 : 255.255.255.252 The subnet mask determines what portion of the TCP/IP address represents your network and what portion can

Oct 17, 2019 · The CIDR number comes from the number of ones in the subnet mask when converted to binary. The common subnet mask 255.255.255.0 is 11111111.11111111.11111111.00000000 in binary. This adds up to 24 ones, or /24 (pronounced ‘slash twenty four’). A subnet mask of 255.255.255.192 is 11111111.11111111.11111111.11000000 in binary, or 26 ones C. A /29 is 255.255.255.248, which is a block size of 8 in the fourth octet. The subnets are 0, 8, 16, 24, 32, 40, etc. 192.168.19.24 is the 24 subnet, and since 32 is the next subnet, the broadcast address for the 24 subnet is 31. 192.168.19.26 is the only correct answer. Class B # of bits: Subnet Mask # Subnets # Hosts: 2: 255.255.192.0: 2: 16382: 3: 255.255.224.0: 6: 8190: 4: 255.255.240.0: 14: 4094: 5: 255.255.248.0: 30: 2046: 6 Thus the Subnet mask can be denoted as /29. With Network ID it can be denoted as 192.168.1.9/29. From the above notation, anyone who knows the standard notation and formulae of subnetting can understand that the IP is using a subnet mask of 255.255.255.248 or /29. The different Subnetting scheme in binary and decimal notation is shown below:

## This free online IPv4 subnet calculator also can be used as a teaching tool and presents the subnetting results as easy-to-understand binary values. We can see two things: all host bits are zeroes in a network address, in a broadcast address they are all set. First bits determine the class of your network from A to E. A, B and C are commonly used.

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