Custom Subnet Masks
Mohsinmoi
ITT-116-RS-SubnetWorksheet1.docx
Use the following tables as references for the remainder of the document.
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IP Address Classes |
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Class A |
1-127 |
Leading bit pattern |
0 |
Network.Host.Host.Host |
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Class B |
128-191 |
Leading bit pattern |
10 |
Network.Network.Host.Host |
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Class C |
224-239 |
Leading bit pattern |
110 |
Network.Network.Network.Host |
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Class D |
224-230 |
Reserved for multicast. |
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Class E |
240-255 |
Reserved for experimental, used for research. |
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Private Addresses |
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Class A |
10.0.0.0 – 10.255.255.255 |
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Class B |
172.16.0.0 – 172.31.255.255 |
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Class C |
192.168.0.0 – 192.168.255.255 |
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APIPA |
169.254.0.1 – 169.254.255.254 |
Binary to Decimal Conversion
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128 |
64 |
32 |
16 |
8 |
4 |
2 |
1 |
Answers |
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0 |
0 |
0 |
1 |
1 |
0 |
1 |
1 |
|
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0 |
0 |
1 |
1 |
1 |
0 |
1 |
1 |
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1 |
1 |
1 |
1 |
0 |
0 |
0 |
0 |
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0 |
0 |
1 |
1 |
0 |
0 |
0 |
1 |
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1 |
0 |
0 |
0 |
1 |
0 |
0 |
0 |
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1 |
0 |
1 |
0 |
1 |
0 |
1 |
0 |
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0 |
1 |
1 |
0 |
1 |
1 |
0 |
1 |
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1 |
0 |
0 |
1 |
1 |
0 |
0 |
1 |
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1 |
1 |
0 |
1 |
0 |
1 |
1 |
0 |
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Decimal to Binary Conversion
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128 |
64 |
32 |
16 |
8 |
4 |
2 |
1 |
Problem |
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200 |
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255 |
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107 |
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224 |
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192 |
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98 |
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242 |
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224 |
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172 |
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100 |
Address Classes
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Address |
Class |
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148.17.9.1 |
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220.200.23.1 |
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177.100.15.4 |
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249.241.80.78 |
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198.155.72.56 |
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10.0.0.1 |
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192.168.123.42 |
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123.231.132.9 |
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42.42.42.42 |
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242.81.64.3 |
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Network Identification
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Highlight the Network Portion:
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Highlight the Host Portion:
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Network Addressing
Write the network addresses for the provided IP address/subnet mask.
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10.10.48.80 255.255.255.0 |
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10.10.10.10 255.0.0.0 |
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27.125.200.151 255.0.0.0 |
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199.203.32.91 255.255.255.0 |
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186.31.32.110 255.255.0.0 |
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192.168.24.19 255.255.0.0 |
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15.30.20.20 255.255.255.0 |
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27.0.2.1 255.0.0.0 |
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164.42.3.4 255.255.255.0 |
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25.25.142.8 255.0.0.0 |
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Host Addresses
Using the IP address and subnet mask shown, write the host address.
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10.10.48.80 255.255.255.0 |
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10.10.10.10 255.0.0.0 |
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27.125.200.151 255.0.0.0 |
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199.203.32.91 255.255.255.0 |
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186.31.32.110 255.255.0.0 |
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192.168.24.19 255.255.0.0 |
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15.30.20.20 255.255.255.0 |
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27.0.2.1 255.0.0.0 |
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164.42.3.4 255.255.255.0 |
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25.25.142.8 255.0.0.0 |
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Default Subnet Mask
Write the correct default subnet mask for each.
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10.10.48.80 255.255.255.0 |
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10.10.10.10 255.0.0.0 |
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27.125.200.151 255.0.0.0 |
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199.203.32.91 255.255.255.0 |
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186.31.32.110 255.255.0.0 |
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192.168.24.19 255.255.0.0 |
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15.30.20.20 255.255.255.0 |
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27.0.2.1 255.0.0.0 |
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164.42.3.4 255.255.255.0 |
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25.25.142.8 255.0.0.0 |
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Custom Subnet Masks
Fill in the blanks.
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Required Subnets |
14 |
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Required Hosts |
14 |
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Network Address |
192.10.10.0 |
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Address Class |
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Default Subnet Mask |
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Custom Subnet Mask |
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Total Number of Subnets |
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Total Number of Host Addresses |
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Number of Usable Addresses |
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Number of Bits Borrowed |
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What is the 10th Subnet Range? |
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What is the subnet number for the 2nd Subnet? |
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What is the broadcast address for the 12th Subnet? |
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What are the usable addresses for the 10th Subnet? |
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Required Subnets |
1000 |
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Required Hosts |
60 |
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Network Address |
156.100.0.0 |
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Address Class |
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Default Subnet Mask |
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Custom Subnet Mask |
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Total Number of Subnets |
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Total Number of Host Addresses |
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Number of Usable Addresses |
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Number of Bits Borrowed |
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What is the 10th Subnet Range? |
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What is the subnet number for the 2nd Subnet? |
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What is the broadcast address for the 12th Subnet? |
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What are the usable addresses for the 100th Subnet? |
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Required Subnets |
6 |
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Required Hosts |
28 |
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Network Address |
182.86.7.0 |
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Address Class |
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Default Subnet Mask |
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Custom Subnet Mask |
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Total Number of Subnets |
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Total Number of Host Addresses |
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Number of Usable Addresses |
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Number of Bits Borrowed |
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What is the 3rd Subnet Range? |
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What is the subnet number for the 2nd Subnet? |
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What is the broadcast address for the 1st Subnet? |
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What are the usable addresses for the 6th Subnet? |
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Required Subnets |
2000 |
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Required Hosts |
15 |
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Network Address |
187.112.0.0 |
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Address Class |
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Default Subnet Mask |
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Custom Subnet Mask |
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Total Number of Subnets |
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Total Number of Host Addresses |
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Number of Usable Addresses |
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Number of Bits Borrowed |
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What is the 100th Subnet Range? |
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What is the subnet number for the 200th Subnet? |
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What is the broadcast address for the 42nd Subnet? |
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What are the usable addresses for the 10th Subnet? |
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Required Subnets |
412 |
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Required Hosts |
1000 |
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Network Address |
128.47.0.0 |
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Address Class |
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Default Subnet Mask |
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Custom Subnet Mask |
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Total Number of Subnets |
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Total Number of Host Addresses |
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Number of Usable Addresses |
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Number of Bits Borrowed |
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What is the 10th Subnet Range? |
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What is the subnet number for the 42nd Subnet? |
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What is the broadcast address for the 300th Subnet? |
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What are the usable addresses for the 12th Subnet? |
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Create the subnetting table for each subnet required for your corporate network.
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Required Subnets |
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Required Hosts |
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Network Address |
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Address Class |
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Default Subnet Mask |
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Custom Subnet Mask |
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Total Number of Subnets |
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Total Number of Host Addresses |
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Number of Usable Addresses |
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Number of Bits Borrowed |
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What are the usable addresses for the 1st Subnet? |
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What are the usable addresses for the 2nd Subnet? |
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What are the usable addresses for the 3rd Subnet? |
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What are the usable addresses for the 4th Subnet? |
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What are the usable addresses for the 5th Subnet? |
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