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Guide to TCP/IP: IPv6 and IPv4, Fifth Edition
ISBN 978-1-305-94695-8
Chapter 10 Solutions
Answers to Review Questions
1. False
3. a, b, c, d
5. c
7. c
9. d
11. True
13. c
15. b
17. True
19. c
21. a
23. c
25. a
Hands-On Projects Discussion
Hands-On Project 10-1
Unlike many other Hands-On Projects involving packet captures, students can’t look for “ISATAP” packets. To
discover ISATAP activity in a capture, the students must look for the results of ISATAP communications. The
network diagram provided in Figure 10-21 gives the students a picture of the network lab where the packet capture
Hands-On Project 10-2
There are only five packets involved in the 6to4 sample capture for student to examine. The final packet in the
sample capture is the focus of this project and represents the end point of the transaction where the source and
Hands-On Project 10-3
As you can see in this capture example, there are a lot more packets available in the Teredo exchange than in the
Guide to TCP/IP: IPv6 and IPv4, Fifth Edition
ISBN 978-1-305-94695-8
Case Projects Discussion
Case Project 10-1
One of the big problems in a mixed IPv4/IPv6 environment is how or if various applications talk to the two
different versions of IP. It stands to reason that the company’s current applications are IPv4 compatible, but very
likely most of them will not communicate with IPv6. If you select applications written specifically for IPv6, they
may not work with IPv4-only nodes and services, which will probably exist in your network for quite some time
Case Project 10-2
Most of the information to resolve this case project was included in the body of the chapter. While Windows 7
does support Teredo, the Teredo tunneling pseudo-interface is disabled by default. The interface can be enabled
and set to use a Teredo server at microsoft.com, but there are a number of errors that can occur. If you run the
netsh interface teredo show state command and the interface has a status of Offline, look in the
Error field of the output. If it states that client is in a managed network, the Type setting for the interface needs to
be set to enterpriseclient and not client.
firewall or the server may not be available.
Case Project 10-3
The diagram doesn’t have to be very detailed but it should include TCP and/or UDP in the Transport header. The
IPv6 header should contain the Next Header field, ideally pointing to the Transport Layer protocol. The IPv6
header also contains the Source and Destination address fields, which, ideally, should indicate that they are
