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Networking > Ch 8: Subnets and VLANs > Flashcards

Ch 8: Subnets and VLANs Flashcards

1
Q

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

A

255.255.255.192

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2
Q

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

A

1022

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3
Q

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

A

trunk port

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4
Q

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

A

Disable auto trunking and move native VLANs to unused VLANs.

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5
Q

With VTP, where is the VLAN database stored?

A

On the switch that is known as the stack master.

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6
Q

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

A

802.1Q

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7
Q

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

A

The site prefix or global routing prefix.

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8
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+?

A

ip helper-address

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9
Q

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

A

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

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10
Q

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

A

4 bytes

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11
Q

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

A

100013

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12
Q

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

A

set native-vlan-id

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13
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?

A

show vlan

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14
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?

A

172.16.0.0

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15
Q

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

A

65,534

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16
Q

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?

A

router-on-a-stick

17
Q

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

A

VLAN 1001

18
Q

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

A

/21

19
Q

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

A

A smaller organization or business

20
Q

What does the VLAN Trunk Protocol (VTP) do?

A

It shares VLAN database information amongst switches that participate.

21
Q

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

A

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

22
Q

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

A

The last four blocks of the address.

23
Q

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

A

256

24
Q

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

A

by device manufacturer

25
Q

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

A

192.168.18.64

26
Q

Subtracting an interesting octet value from 256 yields what number?

A

magic number

27
Q

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?

A

10.3.0.0/19

28
Q

How many subnets can a /48 site prefix support?

A

65,536 subnets

29
Q

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

A

24

30
Q

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?

A

255.255.224.0

Networking (13 decks)

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