Chapter 8

Question 1

Network segmentation decreases both performance and security on a network.

Answer 1

FALSE

Question 2

Only Class B and Class C networks can be subnetted.

Answer 2

FALSE

Question 3

By default, the native VLAN is the same as the default VLAN.

Answer 3

TRUE

Question 4

A native VLAN mismatch occurs when two access ports that are connected to each other are both tagging traffic with different VLAN IDs.

Answer 4

FALSE

Question 5

All that is needed to provide communication between two VLANs is a DHCP relay agent.

Answer 5

FALSE

Question 6

Network segmentation at Layer 2 of the OSI model is accomplished using VLANs.

Answer 6

TRUE

Question 7

A /24 CIDR block is equivalent to a 255.255.255.0 subnet mask.

Answer 7

TRUE

Question 8

IPv6 addressing does not utilize classful addressing, therefore every IPv6 address is classless.

Answer 8

TRUE

Question 9

An unmanaged switch can still support the creation of VLANs, provided there is an interface for configuration.

Answer 9

FALSE

Question 10

In order to identify the transmissions that belong to each VLAN, a switch will add a tag to Ethernet frames that identifies the port through which they arrive at the switch.

Answer 10

TRUE

Question 11

A network with a CIDR notation of /26 would have what subnet mask?

Answer 11

255.255.255.192

Question 12

A network with 10 bits remaining for the host portion will have how many usable host addresses?

Answer 12

1022

Question 13

An interface that manages traffic from multiple VLANs is known by what term?

Answer 13

trunk port

Question 14

Which of the following suggestions can help prevent VLAN hopping attacks on a network?

Answer 14

Disable auto trunking and move native VLANs to unused VLANs.

Question 15

With VTP, where is the VLAN database stored?

Answer 15

On the switch that is known as the stack master.

Question 16

What IEEE standard specifies how VLAN information appears in frames and how switches interpret that information?

Answer 16

802.1Q

Question 17

In an IPv6 address, what do the first four blocks or 64 bits of the address represent?

Answer 17

The site prefix or global routing prefix.

Question 18

On certain Cisco products, what command can be used to create and send helper messages that support several types of UDP traffic, including DHCP, TFTP, DNS, and TACACS+?

Answer 18

ip helper-address

Question 19

When an 802.1Q tag is added to an Ethernet frame, where is it placed?

Answer 19

It is inserted between the source address and the Ethernet type field.

Question 20

How large is the 802.1Q tag that is added to an Ethernet frame when using VLANs?

Answer 20

4 bytes

Question 21

On a Cisco switch, what would the security association identifier be for VLAN 13?

Answer 21

100013

Question 22

What command will set the native VLAN on a Juniper switch port?

Answer 22

set native-vlan-id

Question 23

You are working on a Cisco switch and need to learn what VLANs exist on the switch. Which command will list the current VLANs recognized by the switch?

Answer 23

show vlan

Question 24

Given a host IP address of 172.16.1.154 and a subnet mask of 255.255.254.0, what is the network ID for this host?

Answer 24

172.16.0.0

Question 25

What is the maximum number of host IP addresses that can exist in a Class B network?

Answer 25

65,534

Question 26

Which of the following terms is commonly used to describe a VLAN configuration in which one router connects to a switch that supports multiple VLANs?

Answer 26

router-on-a-stick

Question 27

When dealing with a Cisco switch, what is NOT one of the pre-established VLANs?

Answer 27

VLAN 1001

Question 28

A subnet of 255.255.248.0 can be represented by what CIDR notation?

Answer 28

/21

Question 29

When using IPv6, what would a /64 network likely be assigned to?

Answer 29

A smaller organization or business.

Question 30

What does the VLAN Trunk Protocol (VTP) do?

Answer 30

It shares VLAN database information amongst switches that participate.

Question 31

Which of the following statements regarding IPv6 subnetting is NOT accurate?

Answer 31

The largest IPv6 subnet capable of being created is a /64.

Question 32

If the EUI-64 standard is used, what part of an IPv6 address is affected?

Answer 32

The last four blocks of the address.

Question 33

How many /64 subnets can be created within a /56 prefix?

Answer 33

256

Question 34

What is NOT one of the ways in which networks are commonly segmented?

Answer 34

by device manufacturer

Question 35

An IP address of 192.168.18.73/28 has what network ID?

Answer 35

192.168.18.64

Question 36

Subtracting an interesting octet value from 256 yields what number?

Answer 36

magic number

Question 37

You have been tasked with the creation and design of a network that must support a minimum of 5000 hosts. Which network accomplishes this goal?

Answer 37

10.3.0.0/19

Question 38

How many subnets can a /48 site prefix support?

Answer 38

65,536 subnets

Question 39

By default, when using classful addressing, how many bits exist in the host portion of a Class A address?

Answer 39

24

Question 40

What subnet mask can be used to segment the 172.16.0.0 network to allow for a minimum of 6 subnets while maximizing the number of hosts per subnet?

Answer 40

255.255.224.0