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Can a mask be?
It seems that it can only be a few values.
If so, there can be 16 subnets for the pair.
Each subnet has a maximum of 4094 hosts.
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1.It can be divided into two subnets, each of which can accommodate 62 units.
2.It can be divided into 14 subnets.
3.It can accommodate up to 30 units.
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The first question: subnet mask, because the subnet number can be all 0 or all 1, it can be divided into 2 square subnets, that is, 4 subnets, each subnet can accommodate 2 to the 6th power minus 2 hosts, that is, 62 hosts, because all 0 and all 1 cannot be used as host numbers!
The second problem: subnet mask, so you can have 2 subnets to the power of 4, that is, 16, the principle is the same as the first question!
The third question: the subnet mask is, so it can accommodate 2 to the 5th power minus 2 hosts, that is, 30 hosts, the principle is the same as the first question!
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Class C defaults.
That is, the number of nets left for class B is 2 to the power of 16 (each 0 is 8 bits), and the number of networks left for class C is 2 to the power of 8.
Look at the problem again: 1, it belongs to class C, then the subnet mask is 192 The binary is: 11000000 The network number occupies two digits, and it can be divided into 2 subnets to the second power, removing all 0 and all 1, there are only two subnets; Then the number of hosts is only 2 to the 6th power of hosts, and 2 is subtracted from the number of hosts.
2, Class B mask is 240 four-digit network number 12-digit host number algorithm as above.
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192 becomes 10 decimal 11000000 1 represents the network subnet address 0 represents the host address Note: The subnet number can be all 0 or all 1, while the host number cannot.
So the required number of subnets should be 2 to the power of 2 = 4 subnets.
The number of hosts should be 2 to the 6th power, and the answer is 64, but the host address cannot have all zeros and all one, so minus 2 is 2 to the 6th power minus 2=62 The answer is 4 subnets and 62 hosts.
In the next question, convert 240 to decimal 11110000
The method is the same as above: 4 each 1 represents the subnet address, so it is 2 to the power of 4 equals 16, and the last question.
224 becomes 11100000 in decimal so the number of hosts is 2 to the power of 5 -2 equals 30 hosts.
Finally give you a subnet mask table.
Okay, let's talk about it, my QQ is 821899756 have time + me, communicate with each other.
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