Exercise 4.2: Viewing Default Subnet Masks

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Exercise 4.2: Viewing Default Subnet Masks

This exercise notes the default subnet mask assigned to each TCP/IP address. You should have installed TCP/IP on your Windows NT computer.

1.	Open the Network Properties by right-clicking Network Neighborhood and selecting Properties from the resulting menu.
2.	Select the Protocols tab.
3.	Select TCP/IP and then select Properties.
4.	Write down any existing IP address so that you can restore this address when the exercise is over.
5.	Select the Specify an IP Address button.
6.	Type a Class A address in the IP address field, such as 9.36.108.45.
7.	Note the subnet mask that appears by default.
8.	Select Close to exit the Network Properties dialog box.
9.	Repeat steps 1-3 to open the TCP/IP properties.
10.	Type a Class B address in the IP address field, such as 131.107.2.200.
11.	Note the subnet mask that appears by default.
12.	Select Close to exit the Network Properties dialog box.
13.	Repeat steps 1-3 to open the TCP/IP properties.
14.	Type a Class C address in the IP address field, such as 200.20.5.16.
15.	Note the subnet mask that appears by default.
16.	Type your original IP address as noted in step 4.

Select Close to exit the Network Properties dialog box.

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