Chapter 8 Flashcards by W R

Network segmentation decreases both performance and security on a network.

True
False

False

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Only Class B and Class C networks can be subnetted.

True
False

False

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

True
False

True

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

True
False

False

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

True
False

False

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

True
False

True

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

True
False

True

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

True
False

True

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

True
False

False

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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.

True
False

True

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

255.255.255.0
255.255.255.192
255.255.255.224
255.255.255.240

255.255.255.192

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

510
1022
2046
4192

1022

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

access port
aggregation port
trunk port
egress port

trunk port

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

Install an additional switch to isolate traffic.

Disable auto trunking and move native VLANs to unused VLANs.

Install a router to process the untagged traffic on the VLAN.

Use MAC address filtering.

Disable auto trunking and move native VLANs to unused VLANs.

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With VTP, where is the VLAN database stored?

On the router responsible for maintaining the VTP database.

On the switch that is known as the stack master.

On the switch that is configured as the trunk root.

On the designated VLAN server for the network.

On the switch that is known as the stack master.

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

802.1c
802.1Q
802.1V
802.1d

802.1Q

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

The usable host portion of the network.

The site prefix or global routing prefix.

The broadcast domain for the configured host ID.

The MAC address of the router assigning the host ID.

The site prefix or global routing prefix.

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+?

ip create helper server
ip new helper
set ip helper address
ip helper-address

ip helper-address

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

It is inserted between the preamble and the destination address.

It is inserted between the destination and the source addresses.

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

It is appended to the end of the frame.

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

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

4 bytes
8 bytes
12 bytes
20 bytes

4 bytes

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

1013
5013
100013
1000130

100013

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

switchport trunk native vlan
switchport set native vlan
config native vlan
set native-vlan-id

set native-vlan-id

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?

get vlans
show vlan
list switch-vlans
show vlandb

show vlan

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?

172.16.0.0
172.16.1.0
172.16.2.0
172.0.0.0

172.16.0.0

What is the maximum number of host IP addresses that can exist in a Class B network? 1022 8190 32,766 65,534

65,534

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? router-on-a-stick branched router router overloading router-on-a-branch

router-on-a-stick

When dealing with a Cisco switch, what is NOT one of the pre-established VLANs? VLAN 1 VLAN 1001 VLAN 1003 VLAN 1005

VLAN 1001

A subnet of 255.255.248.0 can be represented by what CIDR notation? /18 /20 /21 /29

/21

When using IPv6, what would a /64 network likely be assigned to? A regional Internet registry. A large Internet service provider. A very large organization. A smaller organization or business.

A smaller organization or business.

What does the VLAN Trunk Protocol (VTP) do? It shares trunking information amongst switches that participate. It shares VLAN database information amongst switches that participate. It is the protocol used by a trunk port for establishing a trunk with another switch. It is the protocol that defines how VLAN tagging is accomplished in an Ethernet network.

It shares VLAN database information amongst switches that participate.

Which of the following statements regarding IPv6 subnetting is NOT accurate? IPv6 addressing uses no classes, and is therefore classless. IPv6 does not use subnet masks. A single IPv6 subnet is capable of supplying 18,446,744,073,709,551,616 IPv6 addresses. The largest IPv6 subnet capable of being created is a /64.

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

If the EUI-64 standard is used, what part of an IPv6 address is affected? The first four blocks of the address. The last four blocks of the address. The middle four blocks of the address. All blocks of the address are affected.

The last four blocks of the address.

How many /64 subnets can be created within a /56 prefix? 256 512 1024 2048

256

What is NOT one of the ways in which networks are commonly segmented? by geographic location by departmental boundaries by device types by device manufacturer

by device manufacturer

An IP address of 192.168.18.73/28 has what network ID? 192.168.16.0 192.168.18.64 192.168.18.32 192.168.18.0

192.168.18.64

Subtracting an interesting octet value from 256 yields what number? network ID subnet ID magic number host ID

magic number

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? 10.3.0.0/19 172.20.50.0/23 192.168.0.0/20 10.90.0.0/22

10.3.0.0/19

How many subnets can a /48 site prefix support? 256 subnets 16384 subnets 65,536 subnets 131,072 subnets

65,536 subnets

By default, when using classful addressing, how many bits exist in the host portion of a Class A address? 8 16 24 32

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? 255.255.248.0 255.255.224.0 255.255.192.0 255.255.128.0

255.255.224.0