IP Subnetting

As part of your assigned readings and material covered in your class lecture, you have learned about IP subnetting including the math involved. For this assignment, you will answer questions relating to IP subnetting.

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• Textbook
• Lecture materials and notes

Deliverables

Answer the questions in the following section.
Turn in your responses to your instructor.
Be sure to show your work, meaning your steps to convert binary to decimal, etc.

Questions:

1. How many bits of mask are required to provide 30 host addresses? 27 Mask=255.255.255.224
2. How many networks will be created using a 255.255.0.0 given a class A IP network (i.e., 10.0.0.0)? 256
3. What would be the dotted decimal equivalent o the slash notation of /30? 255.255.255.252
4. What would be the dotted decimal equivalent o the slash notation of /8? 255.0.0.0
5. What would be the dotted decimal equivalent o the slash notation of /17? 255.255.128.0
6. What would be the dotted decimal equivalent o the slash notation of /12? 255.240.0.0
7. Given 9 bits of mask for the host portion, how many host addresses are
   available? 510
8. Given 13 bits of mask for the host portion, how many host addresses are available? 8190
9. Given 3 bits of mask for the host portion, how many host addresses are available? 6
10. Given 8 bits of mask for the network portion, how many subnets are available? 1024
11. Given 4 bits of mask for the network portion, how many subnets are available? 8192
12. Explain the reasoning behind the concept of “subnet zero.”
13. Prior to Cisco IOS Software Release 12.0, the ip subnet-zero global configuration command was required to be able to configure subnet zero on an interface, but in v12.0 this command became part of the default configuration and is now utilized in network addressing.
14. For a network address, what does the host portion of the address appear as in binary representation? 0
15. For a broadcast address, what does the host portion of the address appear as in binary representation? 255

Complete the table below:

• IP Address
• Dotted Decimal Subnet Mask
• Broadcast Address

Use the following pages to show your work for Question 15 or any other question.

• IP Subnetting Work:

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