MIS 4123 Ch 8

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

True

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

True

A room that contains a rack of equipment for a rack-based collapsed backbone is also called the main distribution facility (MDF) or central distribution facility (CDF).

True

The _________ is the part of the backbone that connects the different backbones together.

Core layer

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

False

A switched backbone uses a bus topology

False

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

False

Routed backbones use switches that move packets based on data link layer addresses.

False

Routers operate at the application layer.

False

The cable to connect BNs is usually twisted pair

False

The cable to connect BNs is usually twisted pair.

False

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

True

A key advantage of a chassis switch is its flexibility.

True

Circuit capacity on a backbone network will not be improved by:

going from 100Base-T Ethernet to 10Base-T Ethernet

Switches:

learn addresses by reading the source and destination addresses

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

main distribution facility

Routers:

may also be called TCP/IP gateways

Devices in a rack are connected together using ___________.

patch cables

As security becomes more important, most routers now have software that enables the network manager to create a(n) _______ that specifies what traffic the router should allow through and what traffic the router should block.

Access control list

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

Access layer

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

Distribution layer

A VLAN network assigns computers to LAN segments by hardware.

False

VLANs prioritize traffic based on the ______.

IEEE 802.1q standard

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

Physical port on the switch

A subnetted or hierarchical backbone can also be called:

Routed backbone

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

Routed backbones

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

Sufficient memory

A __________ type of BN has a star topology with a switch at its center resulting in all devices on the BN segment being part of the same IP network.

Switched backbone

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

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

Which of the following is true regarding switched backbones?

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

Many routers have more sophisticated ACL software that enables the ACL to have different rules for different interfaces

True

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

True

One difference between a switch and a router is that a router will only process messages addressed to the router (at layer 2), while a switch processes all messages.

True

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

True

The distribution layer of a backbone connects LANs together.

True

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.

True

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

True

_______ are the most secure type of backbone because they enable ACL and other security measures to be applied at the switch level.

VLANs

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.

Virtual LAN

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

adding new keyboards to the client computers

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

coax cabling throughout LANs and BN

The biggest drawbacks to VLANs are their_________________.

cost and management complexity

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

decentralized layer

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

dumb terminals

Network demand will not be reduced by:

encouraging the use of applications such as medical imaging

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

false

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.

qoS

Two primary disadvantages to the ______ BN type are that the routers in the network impose time delays, and routers are typically more expensive and require more management than switches.

routed backbone

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

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

Which of the following is not true about switched backbones?

there are many more networking devices in a switched backbone network compared to the number of LANs attaching to it

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

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

Switched backbone networks:

use a star topology with one device, usually a switch