Guide to TCP/IP: IPv6 and IPv4, Fifth Edition
ISBN 978-1–305-94695-8
Chapter 13 Solutions
Answers to Review Questions
1. a, c, d
3. b
5. a, b, c
7. a
9. d
11. True
13. a
15. b
17. False
19. a, c
21. c
23. True
25. c
Hands-On Projects Discussion
Hands-On Project 13-1
There are multiple different tools within the Wireshark protocol analyzer that can be used to troubleshoot network
latency. Some of them were demonstrated in the body of this chapter but a few others were explored during this
project. Specifically, the I/O Graphs window was used to identify the four most “problematic” TCP retransmission
packets contributing to the network latency problem.
Hands-On Project 13-2
A computer can communicate with local and remote nodes for a wide variety of reasons, including sending
broadcasts, multicasts, discovery messages, which are all routine. However, a computer that has been
Hands-On Project 13-3
Historically, two computers could possess the same IP address in small networks where all of the addressing was
Guide to TCP/IP: IPv6 and IPv4, Fifth Edition
ISBN 978-1–305-94695-8
Case Projects Discussion
Case Project 13-1
The first tool just about anyone uses to diagnose a connection problem on the command line is either Ipconfig or
Ping. The ipconfig or ipconfig /all command shows if the Windows computer has been dynamically
assigned an IP address, and the addresses for its default gateway and DNS server. A help desk technician should
know if the address assignments are correct for the network segment of the end user’s computer, and if they aren’t,
Case Project 10-2
The route utility is used to display the current status of the routing table on a network host such as a Windows 10
computer. In the output for the route print -6 command, the IPv6 route table is displayed.
The first part of the output is the interface list, which presents the different IPv6 interfaces and their interface
indexes. IPv6 allows socket applications to select an interface by specifying the interface index.
The second part of the output is the display of individual IPv6 routes used by the computer. The routes can be
understood as follows:
Guide to TCP/IP: IPv6 and IPv4, Fifth Edition
ISBN 978-1–305-94695-8
Case Project 13-3
This Case Project assumes a modern version of Ubuntu and the default bash shell, but the basic network diagnostic
commands should work with any Linux distro and shell.
The Ping utility works pretty much the same on Linux and Mac OS X as it does on Windows, with one notable
difference. On Windows, by default, the ping command responds only four times and stops while on Linux and
Mac, the ping persists until either you press Ctrl+C, or you close the shell.
The Ifconfig utility returns information on the various network interfaces on a Linux computer including eth0, the
Ethernet interface assuming it’s the primary interface, lo, or thelocal loopback “interface”, en1, the wireless
interface, assuming it is secondary to the Ethernet interface. In addition to returning the IPv4 and IPv6 addresses