Review Questions
Answer the following questions, and then refer to Appendix B, “Answers to Review Questions,” for the answers.
| 1: | What is the size in bits of the IPv4 address scheme? |
| 2: | Which classes of IPv4 addresses are not considered globally unique unicast IP addresses? |
| 3: | What is the main rationale behind IPv6? |
| 4: | Explain the consequences of the exhaustion of the IPv4 address space. |
| 5: | Describe the short history of IPv6 from 1993 to 2000. |
| 6: | Name some limitations of NAT. |
| 7: | Describe some of the features added by IPv6. |
| 8: | What is the size in bits of an IPv6 address? |
| 9: | Comparing the OSI reference model of IPv4 to that of IPv6, which layer is updated? |
| 10: | With plenty of IP addresses with IPv6, what is not desirable to have? |
| 11: | Define aggregation. |
| 12: | What happens when a customer changes IPv6 providers? |
| 13: | Why is multihoming more interesting with IPv6 than with IPv4? |
| 14: | Explain autoconfiguration. |
| 15: | Besides autoconfiguration, name the other methods used to configure IPv6 addresses on nodes. |
| 16: | Describe the disadvantages of ARP broadcast in IPv4. |
| 17: | List the main change in the IPv6 header compared to IPv4. |
| 18: | What is the purpose of an extension header? |
| 19: | List and define two mechanisms that are embedded in the IPv6 protocol but that are considered add-ons with IPv4. |
| 20: | How is the migration from IPv4 to IPv6 different from the Y2K bug? |
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