Chapter 8 - Subnets and VLANs

B

What command will set the native VLAN on a Juniper switch port? A. switchport set native vlan B. set native-vlan-id C. config native vlan D. switchport trunk native vlan

D

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

C

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

A

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

B

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. list switch-vlans B. show vlan C. show vlandb D. get vlans

B

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. 172.0.0.0 B. 172.16.0.0 C. 172.16.1.0 D. 172.16.2.0

A

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. B. The usable host portion of the network. C. The MAC address of the router assigning the host ID. D. The broadcast domain for the configured host ID.

true

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.

C

Subtracting an interesting octet value from 256 yields what number? A. host ID B. network ID C. magic number D. subnet ID

true

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

false

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

A

A network with 10 bits remaining for the host portion will have how many usable host addresses? A. 1022 B. 2046 C. 510 D. 4192

C

A network with a CIDR notation of /26 would have what subnet mask? A. 255.255.255.224 B. 255.255.255.240 C. 255.255.255.192 D. 255.255.255.0

A

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

C

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

true

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

false

Network segmentation decreases both performance and security on a network.

A

On a Cisco switch, what would the security association identifier be for VLAN 13? A. 100013 B. 1013 C. 5013 D. 1000130

D

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 create helper server B. ip new helper C. set ip helper address D. ip helper-address

false

Only Class B and Class C networks can be subnetted.

false

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

D

An IP address of 192.168.18.73/28 has what network ID? A. 192.168.16.0 B. 192.168.18.32 C. 192.168.18.0 D. 192.168.18.64

B

An interface that manages traffic from multiple VLANs is known by what term? A. egress port B. aggregation port C. access port D. trunk port

false

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

true

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

D

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

B

How large is the 802.1Q tag that is added to an Ethernet frame when using VLANs? A. 20 bytes B. 4 bytes C. 12 bytes D. 8 bytes

C

How many /64 subnets can be created within a /56 prefix? A. 1024 B. 512 C. 256 D. 2048

D

How many subnets can a /48 site prefix support? A. 131,072 subnets B. 16384 subnets C. 256 subnets D. 65,536 subnets

true

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

A

What IEEE standard specifies how VLAN information appears in frames and how switches interpret that information? A. 802.1Q B. 802.1c C. 802.1d D. 802.1V

A

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

A

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

A

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 B. 255.255.192.0 C. 255.255.128.0 D. 255.255.248.0

A

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. B. It is inserted between the preamble and the destination address. C. It is appended to the end of the frame. D. It is inserted between the destination and the source addresses.

D

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

A

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. B. Use MAC address filtering. C. Install a router to process the untagged traffic on the VLAN. D. Install an additional switch to isolate traffic.

D

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-branch B. branched router C. router overloading D. router-on-a-stick

B

With VTP, where is the VLAN database stored? A. On the designated VLAN server for the network. B. On the switch that is known as the stack master. C On the router responsible for maintaining the VTP database. D. On the switch that is configured as the trunk root.

B

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. 10.90.0.0/22 B. 10.3.0.0/19 C. 172.20.50.0/23 D. 192.168.0.0/20