What are the different kinds of top-level domains

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Reference no: EM132411326

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Review questions -

1. What is DHCP? Why is it useful?

2. What are some of the reasons for the inefficiencies in allocating the available IP addresses?

3. What are the three types of address allocation schemes in DHCP? Under what conditions is each of these categories of address allocation preferred?

4. What is address leasing in DHCP?

5. Use ipconfig /all at the command prompt of a Windows computer. What is the lease duration of the IP address?

6. Briefly describe the sequence of operations that allow a freshly booted DHCP client to obtain an IP address from a DHCP server on the network.

7. What are non-routable IP addresses?

8. IP addresses are used for routing. Why are non-routable IP addresses useful?

9. Why can't a computer with an RFC 1918 IP address be used as a public-facing web server?

10. What is network address translation? Why is it useful?

11. How do DHCP, non-routable addresses, and NAT help improve the efficiency of utilizing IP addresses and reduce the shortage of IP addresses?

12. What is NAPT? How can it improve the efficiency of utilizing IP addresses, compared to NAT, without port translation?

13. Describe the NAPT operation, i.e., describe how the IP addresses in a packet change as a request packet travels from a source with an RFC 1918 address to a destination and the reply comes back to the source.

14. What is ARP? What is it used for?

15. Briefly describe the operation of ARP.

16. List the entries in the ARP cache of your computer using the arp -a command.

17. What is DNS? What is it used for?

18. Describe the hierarchical organization of domains on the Internet.

19. Why is it useful to organize domain names such as www.usf.edu hierarchically as they are done in DNS?

20. What are the different kinds of top-level domains?

21. Describe the process used by a name server to resolve the IP address of a URL typed by a user.

22. What is a zone in the context of DNS?

23. What is a recursive query in DNS? When does it become necessary?

24. What are the different network services provided by the typical home wireless router provided by ISPs?

25. Use the nslookup command to obtain the IP address of www.google.com. (You may have to type in "." after com.) Which name server performed the name resolution for you - your local name server or the Google name server?

Hands-on exercise -

1. Use nslookup to obtain the IP address of your university's website. Show the output.

2. Use nslookup to obtain the IP address of the home page of one of the major employers in your area. Show the output.

3. Use nslookup to obtain the IP address of the home page of one of the companies included in the S&P 500 index. The list of these companies can be found from many sources by searching online for the term "s&p 500 companies." Show the output from nslookup.

Critical thinking questions -

1. Read about the lawsuit filed by Nissan Motors Corporation against Nissan Computer Corporation. Which of the two parties do you think is rightfully entitled to own the Nissan.com domain name? What are your principal arguments in favor of the party?

IT infrastructure design exercise - Start diagram -

1. What services in TrendyWidgets's network will require externally addressable IP addresses?

2. Update your network diagram by adding an Internet connection from the Tampa office. The Internet is typically drawn as a cloud. You may find it convenient to use the IT infrastructure design exercise icons and template document available with the readings for Chapter 1 on the companion website. This diagram only has the Tampa office shown. Please feel free to use the diagram and icons in the document to draw your network in this and subsequent chapters.

3. Further update the diagram to include a NAPT device that translates between the internal /10 network and the external IP addresses obtained from the ISP.

Example case questions -

1. What are some of the essential features needed in an e-commerce website? A good starting point for your answer would be Yahoo's small business site

2. What is an important agricultural or other natural product that your state is known for? Find a business that sells this product online. Describe some important e-commerce capabilities of the company's website. If there is no such product, select one from a nearby state.

3. Find a hosting service provider in your city or the nearest metropolitan area. Visit the company's website and describe some of the services offered by the company. (Select up to three services if the company offers many services.) What are the monthly fees for each of these services? For each of these services, think of a business or non-profit that might find the service useful.

4. From the ISP's website, what are some of the job openings at the hosting service provider you selected? What are the required skills for these openings? If the selected provider has no openings at this time, pick another provider whose website lists at least one job opening.

5. Instead of using the full suite of e-commerce services from a hosting provider, you could limit yourself to hosting services and use free software such as Zen Cart to create your online store. What are some of the capabilities of Zen Cart?

6. What is a favicon? What is your university's favicon?

Reference no: EM132411326

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