Answer the following questions, and then refer to Appendix B, "Answers to Review Questions," for the answers.
For each of the fields in the following table, give the field's length and indicate whether it is used in the IPv4 header or IPv6 header.
Length in Bits
Type of Service
Time to live
List the fields removed from the IPv4 header.
What new field is added in the IPv6 header?
Describe the use of the Next Header field in the IPv6 header.
List the extension headers that may be placed after the basic IPv6 header, and place them in the order they must appear.
What is mandatory with UDP when used over IPv6?
What is recommended as a mechanism for nodes in IPv6 to avoid fragmentation?
What are IPv6's minimum MTU and recommended minimum MTU?
What are the three representations of IPv6 addresses?
Compress the following IPv6 addresses into the shortest form possible.
Describe the IPv6 address representation for URL.
List the three kinds of addresses in the IPv6 addressing architecture.
For each of the following address types, find the IPv6 prefix and write the address in the compressed representation.
Aggregatable global unicast
What is a link-local address?
What is similar to the site-local address in IPv4?
In the following table, list the solicited-node multicast address that corresponds to each unicast address.
Solicited-Node Multicast Address
Give the length in bits of the host and site parts of an aggregatable global unicast IPv6 address.
What three prefixes are assigned by IANA and are available as public addresses in IPv6?
What is the Cisco IOS Software command to enable IPv6 on a Cisco router?
What protocol ID is used for IPv6 in Ethernet frames?
Explain how IPv6 multicast addresses are mapped over Ethernet.
Generate IPv6 interface IDs (in EUI-64 format) from the following Ethernet link-layer addresses.
Ethernet Link-Layer Address
IPv6 Interface ID
What command assigns one IPv6 address to an interface using EUI-64 format?
What is the goal of the path MTU discovery mechanism?