To test your understanding of IPv6 addressing, answer the following questions. See Appendix D, "Testing for Understanding Answers" to check your answers.
- Why is the IPv6 address length 128 bits?
- Define the Format Prefixes (FPs) for commonly used unicast addresses.
- Express FEC0:0000:0000:0001:02AA:0000:0000:0007A more efficiently.
- How many bits are expressed by "::" in the addresses 3341::1:2AA: 9FF:FE56:24DC and FF02::2?
- Describe the difference between unicast, multicast, and anycast addresses in terms of a host sending packets to zero or more interfaces.
- Why are no broadcast addresses defined for IPv6?
- Define the structure, including field sizes, of the aggregatable global unicast address.
- Define the scope for each of the different types of typically used unicast addresses.
- Explain how global and site-local addressing can share the same subnetting infrastructure within an organization.
- Define the structure, including field sizes, of the multicast address.
- Why does RFC 2373 recommend using only the last 32 bits of the IPv6 multicast address for the multicast group ID?
- Explain how the solicited-node multicast address acts as a pseudo-unicast address.
- How do routers know the nearest location of an anycast group member?
- Perform a 4-bit subnetting on the site-local prefix FEC0:0:0:3D80::/57.
- What is the IPv6 interface identifier for the universally administered, unicast IEEE 802 address of 0C-1C-09-A8-F9-CE? What is the corresponding link-local address? What is the corresponding solicited-node multicast address?
- What is the IPv6 interface identifier for the locally administered, unicast EUI-64 address of 02-00-00-00-00-00-00-09? What is the corresponding link-local address?
- What is the site-local scope multicast address corresponding to the Ethernet multicast MAC address of 33-33-00-0A-4F-11?
- For each type of address, identify how the address begins in colon hexadecimal notation.
Type of Address | Begins with... |
Link-local unicast address | FE80 |
Site-local unicast address | |
Global address | |
Multicast address | |
Link-local scope multicast address | |
Site-local scope multicast address | |
Solicited-node multicast address | |
IPv4-compatible address | |
IPv4-mapped address | |
6to4 address | |