Posted by rocky on Saturday, November 7, 2009 at 11:09pm.
Is Programming your School Subject?
I am not an expert on networking, but I will try to give an answer to the best of my knowledge.
Since the network part is 128.171, it is a class B subnet. Using 10 bits for the subnet means that it will use a 10 bit subnet-mask, namely 255.255.255.192, or in bits,
11111111.11111111.11111111.11000000.
Since subnets with all zeroes (address of network) and all ones (broadcast address) are not allowed, the first subnet begins with
128.171.0.64
or
10000000.10101011.00000000.01------.
Thus there can be 210 = 1022 possible subnets, and each subnet can have 26-2 = 62 hosts.
The first host on the first subnet is therefore:
10000000.10101011.00000000.01000001.
or
128.171.0.65
Oops:
"Thus there can be 210-2 = 1022 possible subnets...."
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