What is the organizational motivation for subnetting

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Reference no: EM132411299

Assignment - Subnetting

Review questions -

1. What is subnetting?

2. What is the organizational motivation for subnetting?

3. In large organizations, what are some disadvantages with allocating IP addresses on a first-come, first-served basis?

4. How do you determine the number of subnets needed in an organization?

5. Using an example, describe the three-part interpretation of IP addresses when subnetting is used.

6. Describe how subnetting is similar to the three-part organization of telephone numbers.

7. Describe how subnetting is similar to the multi-part organization of zip codes.

8. How does the three-part numbering system used in telephones facilitate the switching of long distance calls?

9. How does the multi-part numbering scheme used in zip codes simplify the mail handling tasks at a typical post office?

10. What are the three IP addresses on any network that are not available for allocation to hosts?

11. What factors determine the subnet structure of an organization? For example, if you have a Class B address, how will you determine if you should have 512 subnets, 256 subnets, 128 subnets, 64 subnets, or some other number of subnets?

12. What is a subnet mask?

13. Why are subnet masks needed?

14. What do the 1s and 0s in a subnet mask represent?

15. Can 255.255.253.0 be a subnet mask? Why or why not?

16. What information about a network can be gathered by looking at its subnet mask?

17. Say you have a /14 network address. You are asked to create subnets with at least 1,000 hosts/ subnet. What subnet mask should you use?

18. How many subnets can you have on the network in the question above?

19. The broadcast address on a subnet is obtained by replacing the bits in the host part with 1s instead of 0s. What is the broadcast address of the subnet 192.168.1.192/28?

20. How many hosts can a /18 network support?

21. Say you have a /15 network address. You are asked to create subnets with at least 1,000 hosts/ subnet. What is the maximum number of such subnets you can create?

22. What is the subnet mask you will use for the question above?

23. Consider two IP addresses: 192.168.35.56 and 192.168.36.135. If the subnet mask used is 255.255.252.0, what are the masked IP addresses (subnet IDs) for the two IP addresses?

24. How is subnetting in IPv6 different from subnetting in IPv4?

25. How can subnetting help limit network traffic at routers?

Hands-on exercise -

1. Write the subnet mask in the figure in 32-bit binary notation.

2. How many bits in IP addresses on the network are used for the host part of the IP address?

3. How many hosts can the subnet of the figure accommodate?

4. How many bits in IP addresses on the network are used for the network part of the IP address?

5. The IP address of the computer is 10.247.197.61. Write this IP address as a 32-bit binary IP address.

6. What is the masked address of the host in binary notation? (This is the network ID + subnet ID part of the IP address.)

7. Express this masked address in dotted decimal notation. Express the masked address in CIDR notation.

8. Show the ipconfig /all output on your computer. What is the subnet mask on the network?

9. Based on the subnet mask, how many computers can be addressed on the subnet on which your computer is located?

Critical thinking questions -

Say you are using the 192.168.0.0/16 address block to create subnets for a typical medium-sized business with about 2,000 employees.

1. You have been told to provide a subnet for each major department in the business. Assuming that the business has a typical organization structure for a business of this size, list the different subnets you would like to set up for the business.

2. How many bits would you need in the subnet ID to provide the required number of subnets?

3. How many hosts IDs would be available in each subnet in your design?

4. Present your results in the form of a table like the table in the chapter.

IT infrastructure design exercise -

Before responding to this section, please look at the information provided in the text for this section.

1. What subnets would be suitable for use in the company's four locations?

2. Update the network diagram from Chapter 7 to show the subnets you created in the previous question.

3. Further update the network diagram to show the four DHCP servers, one server at each location.

Example case questions -

1. How many customers can the ISP serve in San Antonio?

2. How many customers can the ISP serve in Houston, combining the capacity of all the subnets?

3. If the two /20 Houston subnets are merged together, what is the subnet address of the resulting network?

4. What are the /24 subnets that comprise the Dallas /21 subnet? (Hint: there are 2(24 - 21) = 8 such subnets.)

5. What are the /24 subnets that comprise the Austin /21 subnet?

6. Use BGPlay to show the network connectivity diagram for the 66.118.0.0/18 network.

7. What is the data rate of an OC-12 connection?

8. Now, assume that the last /24 subnet in each case (Dallas and Austin) is pulled out and allocated to San Antonio and Houston. What are the remaining subnets in Dallas and Austin? Aggregate the subnets where possible.

Reference no: EM132411299

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