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Data Communication > Chapter 8: Subnets and VLANs > Flashcards

Chapter 8: Subnets and VLANs Flashcards

1
Q

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

4192
1022
2046
510

A

1022

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2
Q

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

255.255.255.192
255.255.255.224
255.255.255.240
255.255.255.0

A

255.255.255.192

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3
Q

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

192.168.18.0
192.168.18.64
192.168.16.0
192.168.18.32

A

192.168.18.64

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4
Q

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

access port

aggregation port

egress port

trunk port

A

aggregation port

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5
Q

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
172.0.0.0
172.16.2.0

A

172.16.0.0

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6
Q

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

8 bytes
4 bytes
20 bytes
12 bytes

A

4 bytes

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7
Q

How many subnets can a /48 site prefix support?

256 subnets
65,536 subnets
131,072 subnets
16384 subnets

A

65,536 subnets

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8
Q

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

The middle four blocks of the address.

All blocks of the address are affected.
You Answered

The first four blocks of the address.

The last four blocks of the address.

A

The last four blocks of the address.

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9
Q

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

1000130

100013

1013

5013

A

100013

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10
Q

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 new helper

set ip helper address

ip helper-address

ip create helper server

A

ip helper-address

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11
Q

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

802.1c
802.1V
802.1Q
802.1d

A

802.1Q

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12
Q

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

config native vlan

set native-vlan-id

switchport trunk native vlan

switchport set native vlan

A

set native-vlan-id

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13
Q

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

by geographic location

by device types

by departmental boundaries

by device manufacturer

A

by device manufacturer

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14
Q

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

1022

8190

32,766

65,534

A

65,534

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15
Q

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

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

It is inserted between the preamble and the destination address.

It is inserted between the destination and the source addresses.

It is appended to the end of the frame.

A

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

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16
Q

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

VLAN 1001

VLAN 1005

VLAN 1

VLAN 1003

A

VLAN 1001

17
Q

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

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

IPv6 addressing uses no classes, and is therefore classless.

A single IPv6 subnet is capable of supplying 18,446,744,073,709,551,616 IPv6 addresses.

You Answered
IPv6 does not use subnet masks.

A

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

18
Q

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

Disable auto trunking and move native VLANs to unused VLANs.

Use MAC address filtering.

Install an additional switch to isolate traffic.

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

A

Disable auto trunking and move native VLAN to unused VLANs.

19
Q

With VTP, where is the VLAN database stored?

On the switch that is known as the stack master.

On the switch that is configured as the trunk root.

On the router responsible for maintaining the VTP database.

On the designated VLAN server for the network

A

On the switch that is known as the stack master.

20
Q

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?

show vlandb

get vlans

list switch-vlans

show vlan

A

show vlan

Data Communication (12 decks)

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