Chapter 8

Front 1

Layer-3 switches switch messages based on their data link layer address.

Back 1

False

Front 2

A _____________ type of BN segments (each of which has a special set of subnet addresses that can be managed by different network managers) each part of the network connected to the backbone.

Back 2

routed backbone

Front 3

A routed backbone tends to be used more for large networks than VLANs, although VLAN high speed switches and this new type of LAN-BN architecture are now being considered.

Back 3

True

Front 4

Which of the following is not true about backbone networks?

Back 4

They tend to use lower speed circuits than LANs.

Front 5

A __________ type of BN has a star topology with one device, such as a switch, at its center.

Back 5

Switched backbone

Front 6

A backbone network is a high-speed network that connects many networks

Back 6

True

Front 7

Routers can only connect the same type of cable.

Back 7

False

Front 8

A switched backbone uses a bus topology

Back 8

False

Front 9

Routers:

Back 9

require more management than switches

Front 10

Switches:

Back 10

learn addresses by reading the source and destination addresses

Front 11

A hardware device that operates at the application layer is a router.

Back 11

False

Front 12

A backbone network that connects many backbone networks spanning several buildings at a single location is often called an Internet backbone.

Back 12

False

Front 13

The biggest drawbacks to VLANs are their_________________.

Back 13

cost and management complexity

Front 14

One basic component of a backbone network is the hardware device that connects other networks to the backbone.

Back 14

True

Front 15

VLANs prioritize traffic based on the ______.

Back 15

IEEE 802.1q standard

Front 16

Routers connect two or more network segments that use the same or different data link protocols, but the same network protocol.

Back 16

True

Front 17

Which of the following is not true about Layer-3 switches?

Back 17

They can only switch messages based on their data link layer addresses.

Front 18

Switches and routers are devices that can connect networks to the BN.

Back 18

True

Front 19

Which of the following is a fundamental backbone network architecture?

Back 19

Virtual LAN

Front 20

One difference between a switch and a router is that a router will only process messages addressed to the router, while a switch processes all messages.

Back 20

True

Front 21

Which of the following is not a technology layer that is considered when designing backbone networks?

Back 21

decentralized layer

Front 22

The cable to connect BNs is usually twisted pair.

Back 22

False

Front 23

A _____________ type of BN is a new type of LAN/BN architecture made possible by intelligent, high speed switches that assign computers to LAN segments via software, rather than by hardware.

Back 23

Virtual LAN

Front 24

Computers can be assigned to a VLAN based on the ________.

Back 24

physical port on the switch

Front 25

A subnetted or hierarchical backbone can also be called:

Back 25

Routed backbone

Front 26

Associated with a switched backbone, MDF is an acronym for:

Back 26

main distribution facility

Front 27

The backbone architecture layer that is closest to the users is the

Back 27

access layer

Front 28

One advantage of a routed backbone is that is requires little management.

Back 28

False

Front 29

Which of the following is true regarding switched backbones?

Back 29

They place all network devices for one part of the building physically in the same room, often in a rack of equipment

Front 30

Most backbone devices are store-and-forward devices. One simple way to improveperformance is to ensure that they have ________________.

Back 30

sufficient memory

Front 31

VLANs provide faster performance compared to switched, collapsed or routed backbone architectures.

Back 31

True

Front 32

Which of the following is not a way that a router differs from a switch?

Back 32

routers can connect two or more networks that use the same data link protocol

Front 33

Using ______ capabilities, network managers can connect VOIP phones directly into a VLAN switch and configure the switch to reserve sufficient network capacity so that they will always be able to send and receive voice messages.

Back 33

QoS

Front 34

_________ move packets along the backbone based on their network layer address.

Back 34

Routed backbones

Front 35

Routers use network layer address to forward packets between network segments.

Back 35

True

Front 36

Routers:

Back 36

may also be called TCP/IP gateways

Front 37

Network demand will not be reduced by:

Back 37

encouraging the use of applications such as medical imaging

Front 38

Switched backbone networks:

Back 38

use a star topology with one device, usually a switch

Front 39

Backbone networks typically use lower speed circuits to interconnect a series of LANs and provide connections to other backbone networks.

Back 39

False

Front 40

Which of the following is not true about switched backbones?

Back 40

there are many more networking devices in a switched backbone network

Front 41

The _______ is the part of the backbone that connects the LANs together.

Back 41

distribution layer

Front 42

A VLAN requires the computer manager to reconfigure the physical cables to the switch if a computer is moved from one port to another port on a switch.

Back 42

False

Front 43

Device performance on a backbone network will not be improved by:

Back 43

translating packets from one protocol to another as they enter the BN

Front 44

Which of the following would not be part of an "ideal" backbone design for the future?

Back 44

coax cabling throughout LANs and BN

Front 45

Which of the following is not a type of hardware device that can be used to interconnect networks?

Back 45

dumb terminals

Front 46

A VLAN network assigns computers to LAN segments by hardware.

Back 46

False

Front 47

Which of the following would be least effective in improving backbone performance?

Back 47

adding new keyboards to the client computers

Front 48

A key advantage of a chassis switch is its flexibility.

Back 48

True

Front 49

_________ have no backbone cable.

Back 49

Switched backbones

Front 50

The primary advantage of a routed backbone is that it clearly segments each part of the network connected to the backbone because each segment has its own subnet addresses that can be managed separately.

Back 50

True