Networking Chapter 8 When a switch receives a frame on a port and floods the frame, what does it do with the frame

Guide to Networking Essentials, 8th ed., ISBN 9780357118283

Chapter 8 Solutions-1

Chapter 8 Solutions

Review Questions

1. When a switch receives a frame on a port and floods the frame, what does it do with

the frame?

b. Changes the destination address to FF:FF:FF:FF:FF:FF

d. Clears the switching table and adds the frame source address to the table

2. You have two eight-port switches. On each switch, seven stations are connected to

ports, and the two switches are connected with the eighth port. How many collision

domains are there?

a. 16

d. 8

e. 1

3. Which of the following is considered a Layer 2 device?

a. Computer

d. Hub

4. You just purchased some new switches for your company’s network. Your junior

technicians are doing most of the work connecting switches to workstations and to

each other, and you don’t want to confuse them by requiring them to use both patch

cables and crossover cables. How can you test the switches to determine whether you

need both types of cable, and what’s the feature for using only one type of cable for

all connections?

a. Connect the switch to a PC NIC and configure different speeds on the NIC by

using the NIC driver. You’re okay if the switch links at all speeds. It’s called

auto-MDIX.

b. Connect two switches by using a crossover cable. If the connection works, the

switch supports auto-negotiate.

Guide to Networking Essentials, 8th ed., ISBN 9780357118283

Chapter 8 Solutions-2

5. What feature of a switch keeps switching table entries from becoming stale?

a. Half-duplex

d. Auto-MDIX

6. Which is the fastest switching method?

a. Store-and-forward

d. Forward-free

7. There can be only one MAC address per port in a switching table. True or False?

8. What does it mean if the first 24 bits of a MAC address are 01:00:5E?

a. The NIC was manufactured by Intel.

d. The frame will be flooded.

9. What feature should you look for in switches if your network is cabled so that

multiple switches are connected together for redundancy?

a. VLANs

d. Auto-MDIX

10. What should you configure on a switch that’s connected to three broadcast domains?

a. IGMP

Guide to Networking Essentials, 8th ed., ISBN 9780357118283

Chapter 8 Solutions-3

d. STP

11. Which of the following is a Layer 3 device? (Choose all that apply.)

b. NIC

c. Switch

12. What does a router do after receiving a frame on one of its interfaces? (Choose all

that apply.)

b. Deencapsulates the packet to create a segment

c. Encapsulates the frame to create a new packet

13. Which of the following is found in a routing table? (Choose all that apply.)

a. Destination MAC address

b. TCP port number

e. Domain name

14. Which of the following accurately describes a distance-vector routing protocol?

a. OSPF is an example.

d. It converges the fastest.

15. Which of the following is a characteristic of routing protocols? (Choose all that

apply.)

a. They populate routing tables statically.

c. They’re not a good solution with redundant routes.

Guide to Networking Essentials, 8th ed., ISBN 9780357118283

Chapter 8 Solutions-4

16. Which of the following is the best routing solution for a network that includes

redundant links?

b. STP

d. Static

17. If you don’t want wireless clients to view the name of your wireless network, what

feature should you use?

a. WEP

d. AP isolation

18. To prevent a wardriver from being able to interpret captured wireless network data,

you should enable which of the following?

a. MAC filtering

b. AP isolation

19. What feature can you use to wirelessly connect the wired networks in two buildings?

a. Repeater mode

b. AP isolation

20. Which AP feature is useful when you have many guests accessing your network and

you don’t want them to be able to access the computers of other guests?

a. MAC filtering

d. VLAN mode

21. Which PC bus uses up to 32 lanes to achieve very high data transfer rates?

a. PCI

b. PCI-X

22. Which PC bus allows you to connect a NIC to your computer easily without

powering off?

a. PCI

b. PCI-X

23. Which NIC feature do you need to configure on a thin client?

a. QoS

d. ACPI

24. Which device is used to communicate between broadcast domains?

a. Repeater

b. Switch with VLANs

25. What feature should you configure to prevent users on one subnet from accessing the

Web server on another subnet?

a. MAC filtering

d. Spanning Tree Protocol

Guide to Networking Essentials, 8th ed., ISBN 9780357118283

Chapter 8 Solutions-6

Challenge Labs

Challenge Lab 8-1

• Which security protocol was the easiest to configure? Which protocol is the most secure?

Answers will vary depending on which protocols are available. Generally, WPA2 is easy

Challenge Lab 8-2

Router A

How

Network

Via/next hop

Metric

Interface

C

192.168.1.0/24

Connected

0

Ethernet0

C

192.168.2.0/24

Connected

0

Ethernet1

C

192.168.3.0/24

Connected

0

Serial0

R

192.168.4.0/24

192.168.3.2

1

Serial0

R

192.168.5.0/24

192.168.3.2

1

Serial0

R

192.168.6.0/24

192.168.3.2

2

Serial0

R

192.168.7.0/24

192.168.3.2

1

Serial0

R

192.168.8.0/24

192.168.3.2

2

Serial0

R

192.168.9.0/24

192.168.3.2

2

Serial0

Router B

How

Network

Via/next hop

Metric

Interface

R

192.168.1.0/24

192.168.3.1

1

Serial1

R

192.168.2.0/24

192.168.3.1

1

Serial1

C

192.168.3.0/24

Connected

0

Serial1

C

192.168.4.0/24

Connected

0

Ethernet0

C

192.168.5.0/24

Connected

0

Serial0

R

192.168.6.0/24

192.168.5.2

1

Serial0

C

192.168.7.0/24

Connected

0

Serial2

R

192.168.8.0/24

192.168.5.2 and

192.168.7.2

1

Serial0

Serial2

R

192.168.9.0/24

192.168.7.2

1

Serial2

Guide to Networking Essentials, 8th ed., ISBN 9780357118283

Chapter 8 Solutions-7

Router C

How

Network

Via/next hop

Metric

Interface

R

192.168.1.0/24

192.168.5.1

2

Serial0

R

192.168.2.0/24

192.168.5.1

2

Serial0

R

192.168.3.0/24

192.168.5.1

1

Serial0

R

192.168.4.0/24

192.168.5.1

1

Serial0

C

192.168.5.0/24

Connected

0

Serial0

C

192.168.6.0/24

Connected

0

Ethernet0

R

192.168.7.0/24

192.168.8.2 and

192.168.5.1

1

Serial1

Serial0

C

192.168.8.0/24

Connected

0

Serial1

R

192.168.9.0/24

192.168.8.2

1

Serial1

Router D

How

Network

Via/next hop

Metric

Interface

R

192.168.1.0/24

192.168.7.1

2

Serial1

R

192.168.2.0/24

192.168.7.1

2

Serial1

R

192.168.3.0/24

192.168.7.1

1

Serial1

R

192.168.4.0/24

192.168.7.1

1

Serial1

R

192.168.5.0/24

192.168.7.1 and

192.168.8.1

1

Serial1

Serial0

R

192.168.6.0/24

192.168.8.1

1

Serial0

C

192.168.7.0/24

Connected

0

Serial1

C

192.168.8.0/24

Connected

0

Serial0

C

192.168.9.0/24

Connected

0

Ethernet0

Challenge Lab 8-4

• 4. The ping is not successful. Why not? The computers are in different VLANs, so they

• 13. Configure the default gateway address on all four computers. What is the correct default

gateway address for each computer?

Guide to Networking Essentials, 8th ed., ISBN 9780357118283

Chapter 8 Solutions-8

Case Projects

Case Project 8-1

Students should mention the following in their responses:

• VLANs to group users for projects no matter what their physical locations are

Case Project 8-2

Case Project 8-3

With statically configured routing, the router can’t adjust to changing conditions in the network,

such as offline links. An administrator would have to change the static routes to solve the problem,

leading to downtime.