Guide to Networking Essentials, 8th ed., ISBN 9780357118283
Chapter 14 Solutions-1
Chapter 14 Solutions
Review Questions
1. Which device can determine whether a cable break or short exists and approximately how far
down the cable it’s located?
a. Network monitor
b. RMON
2. At what layer of the OSI model is a CRC error detected?
c. Physical
d. Session
3. Which type of plan makes it easier to return a network to its state before an upgrade?
a. Backup plan
d. Downgrade plan
4. Based on the eight-step problem-solving process discussed in this chapter, what’s the first
step in network troubleshooting?
a. Devise a solution.
b. Consider possible causes.
5. Which problem-solving approach requires a solid understanding of how networks work?
a. Trial and error
d. Replacement method
6. Under which condition is using the trial-and-error approach not advisable? (Choose all that
apply.)
a. You can undo changes easily.
d. No data can be lost.
7. At which layer are problems restricted to one workstation likely to occur?
a. Data Link
b. Transport
8. After implementing a solution, what’s the next step?
a. Document the solution.
d. Consider possible causes.
9. Which of the following can be used to prevent data loss during a power fluctuation or failure?
a. TDR
d. SNMP
10. Which of the following is an element of the information-gathering step in the problem-solving
process? (Choose all that apply.)
d. Consider possible causes.
11. When measuring network performance, what do you need as a point of reference?
a. SNMP
d. Protocol analysis
12. Which of the following is the TCP/IP protocol used with a network management system?
a. ICMP
d. SMTP
14. What tool does its job by measuring the amount of time it takes for a signal to travel the
length of a fiber-optic cable and back?
a. Tone generator
b. Probe
15. Which device is used in fiber-optic cable testing?
a. DVM
c. Multimeter
16. For which of the following network conditions must you use a protocol analyzer or network
monitor for further diagnosis? (Choose all that apply.)
a. Cable break
b. Cable short
17. At what layers of the OSI model does a software protocol analyzer operate?
a. Layers 1, 2, and 3
b. Layers 1 to 4
18. Which of the following is not found in the output of a successful ping reply?
a. IP address of the responding computer
b. The number of bytes in the ICMP message
19. Which element of the network documentation describes the physical layout of network
media?
a. Internetworking devices
d. Servers
20. When using the ping command to solve a network connection problem, which of these steps
can you skip if the target host is on the same LAN?
a. Ping the 127.0.0.1 address.
b. Ping the host’s IP address.
21. What should a company providing IaaS services have in place if a customer needs immediate
recovery from a catastrophic failure that cripples its IT infrastructure?
c. RAID 1 disks
d. Load balancers
Guide to Networking Essentials, 8th ed., ISBN 9780357118283
Chapter 14 Solutions-5
Hands-On Projects
Hands-On Project 14-1
Step 2: All seven layers are tested when using a Web browser because HTTP, an Application-layer
protocol, is used.
Step 3: The address returned by nslookup should be 198.60.123.102.
Challenge Labs
Challenge Lab 14-1
Answers will vary. Students should maintain a log of the problem, symptoms, and the layers of the OSI
model they tested while solving the problem. The solution should also be stated.
Challenge Lab 14-2
• Did your computer generate more than one DNS query for each lookup? If so, why? Answers will
Challenge Lab 14-3
• How can the information you gathered be useful in documenting and supporting your network?
Challenge Lab 14-4
• What are three major features of WhatsConnected?
• How can these features help you to maintain and support a network?
Guide to Networking Essentials, 8th ed., ISBN 9780357118283
Chapter 14 Solutions-6
Case Projects
Case Project 14-1
Answers will vary. Students should put together a reasonable group of questions for determining the scope
Case Project 14-2
Answers will vary.
Case Project 14-3
The most likely answer is that the upgrade might solve performance issues with the workstations’ access to
the servers. However, problems that can result include server and router bottlenecks because the