MIS 140 Final Study

OC-3072 has a data rate of a. 159.25 Gbps b. 39.813 Gbps c. 1.544 Mbps d. 100 Mbps e. 1.244 Gbps

159.25 Gbps

The backbone architecture layer that is closest to the users is the a. Access layer b. Distribution layer c. Core layer d. Privacy layer e. Switched layer

Access layer

Which of the following is not true about multiswitch VLANs? a. Several switches are used to build a VLAN b. The switches in the VLAN can send packets among themselves in a way that identifies the VLAN to which the packet belongs. c. In some multi-switch VLANs, the Ethernet packet is modified based on the emerging IEEE 802.1q standard. d. In some multi-switch VLANs, a new VLAN packet encapsulates the Ethernet packet. e. All of the above are true statements.

All of the above are true statements.

A __________ is a device that permits a customer to connect to a digital T-carrier service. a. modem b. codec c. CSU/DSU d. NIC e. ATM

CSU/DSU

__________ are companies that build a data and telecommunications infrastructure from which other companies can lease services for WANs and MANs. a. Common carriers b. Router manufacturers c. Standards organizations d. CSUs e. PUCs

Common carriers

The _________ is the part of the backbone that connects the different backbones together. a.) Access layer b.) Distribution layer c.) Core layer d.) Privacy layer e.) Switched layer

Core layer

A _______ is a connectionless method of sending data packets on a packet switched service. a. bursty packet b. virtual circuit c. datagram d. histogram e. permanent virtual circuit

Datagram

__________ are sometimes called private line services. a. WANs b. LANs c. Circuit-switched networks d. Dedicated-circuit networks e. Routed-backbone networks

Dedicated-circuit networks

The _______ is the part of the backbone that connects the LANs together. a.) Access layer b.) Distribution layer c.) Core layer d.) Privacy layer e.) Switched layer

Distribution layer

Which of the following is not a type of hardware device that can be used to interconnect networks? a. layer 3 switches b. routers c. dumb terminals d. layer 2 switches e. all of the above can be used

Dumb terminals

The __________ is a United States government agency that regulates voice and data communication. a. PSTN b. FCC c. CRTC d. CSU e. POTS

FCC

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.

False

T/F: A VLAN network assigns computers to LAN segments by hardware.

False

T/F: A backbone network that connects many backbone networks spanning several buildings at a single location is often called an Internet backbone

False

T/F: A disadvantage of a star architecture is that the failure of one circuit will disrupt the entire network.

False

T/F: A hardware device that operates at the application layer is a router.

False

T/F: A switched backbone uses a bus topology.

False

T/F: An OC-1 circuit provides a data rate of 155 Mbps.

False

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

False

T/F: Layer-3 switches switch messages based only on their data link layer address.

False

T/F: MPLS operate at layer 4.

False

T/F: One advantage of a routed backbone is that is requires little management.

False

T/F: Routed backbones use switches that move packets based on data link layer addresses.

False

T/F: Routers can only connect the same type of cable.

False

T/F: Routers operate at the application layer.

False

T/F: The cable to connect BNs is usually twisted pair.

False

T/F: To connect into a packet switched network, a network terminator is generally used.

False

T/F: Today, a common carrier that provides long distance services is typically called a local exchange carrier.

False

T/F: VPNs offer high security because they operate through the Internet.

False

Switches: a. learn addresses by reading the source and destination addresses b. operate at the physical layer only c. connect two ore more network segments that use different data link protocols d. connect two or more network segments that use different network protocols e. have become more popular than layer 2 switches

Learn addresses by reading the source and destination addresses

__________ is sometimes called a Layer 2.5 technology. a. ATM b. MPLS c. Ethernet d. TCP e. IP

MPLS

Computers can be assigned to a VLAN based on the ________. a.) IEEE 802.1q standard b.) NIC interface c.) physical port on the switch d.) IEEE 802.3 standard e.) physical location of the computer

Physical port on the switch

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. a. backbone b. switched c. routed d. QoS e. access

QoS

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. a. bridged backbone b. virtual LAN c. hubbed backbone d. collapsed backbone e. routed backbone

Routed backbone

A subnetted or hierarchical backbone can also be called: a. Bridged backbone b. Virtual LAN c. Hubbed backbone d. Collapsed backbone e. Routed backbone

Routed backbone

__________ move packets along the backbone based on their network layer address. a. Bridged backbones b. Hubbed backbones c. Multistation access unit backbones d. Routed backbones e. NIC backbones

Routed backbones

Most backbone devices are store-and-forward devices. One simple way to improve performance is to ensure that they have ________________. a.) enough ports b.) sufficient memory c.) twisted pair connections d.) large wheels e.) IEEE 802.11

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. a. Bridged backbone b. Virtual LAN c. Hubbed backbone d. Switched backbone e. Routed backbone

Switched backbone

_________ have no backbone cable. a. Switched backbones b. Cloud routed backbones c. Hubbed backbones d. Bridged backbones e. Multistation access unit backbones

Switched backbones

Which of the following is not a benefit of packet switched services? a. The data transmission rates tend to be lower than dial-up or dedicated circuits. b. You don't have to set up dedicated circuits between each end point from which you wish to transmit and receive data and/or voice. c. You have the flexibility to send data through a temporary circuit between two connections that will be disconnected as soon as the digital transmission is completed. d. All circuits are less susceptible to a great deal of noise because they are digital. e. You don't have to specify all the interconnecting services you need for your WAN when you buy the service.

The data transmission rates tend to be lower than dial-up or dedicated circuits.

Which of the following is true regarding switched backbones? a. They place all network devices for one part of the building physically in the same room, often in a rack of equipment b. They have an advantage of requiring less cable c. They make it more difficult to move computers from one LAN to another d. Network capacity is always tied to the physical location of the computers e. They are harder to maintain and upgrade than a BN that is not rack-based

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

Which of the following is true regarding switched backbones? a. They place all network devices for one part of the building physically in the same room, often in a rack of equipment b. They have an advantage of requiring less cable c. They make it more difficult to move computers from one LAN to another d. Network capacity is always tied to the physical location of the computers e. They are harder to maintain and upgrade than a BN that is not rack-based

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

Which of the following is not true about backbone networks? a. They may also be called enterprise networks if they connect all networks within an organization b. They typically connect many networks, including LANs c. They typically provide connections to other BNs, WANs, MANs, and the Internet d. They may also be called campus networks if they connect many BNs spanning several buildings as a single location e. They tend to use lower speed circuits than LANs

They tend to use lower speed circuits than LANs

T/F: A T1 circuit provides a data rate of 1.544Mbps.

True

T/F: A WAN with a ring topology can use full or half duplex circuits

True

T/F: A backbone network is a high-speed network that connects many networks

True

T/F: A key advantage of a chassis switch is its flexibility.

True

T/F: 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

T/F: 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.

True

T/F: Common carriers sell or lease communication services and facilities to the public.

True

T/F: Ethernet services are now being successfully used in WAN environments.

True

T/F: In constructing Wide Area Networks, many organizations do not build their own long distance communication circuits.

True

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

True

T/F: 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

T/F: Packet switched networks enable packets from separate messages or separate organizations to be interleaved for transmission.

True

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

True

T/F: Routers use network layer address to forward packets between network segments.

True

T/F: Switches and routers are devices that can connect networks to the BN.

True

T/F: The distribution layer of a backbone connects LANs together.

True

T/F: 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

T/F: VLANs provide faster performance compared to switched, collapsed or routed backbone architectures.

True

T/F: Virtual private networks permit users to create permanent virtual circuits, or tunnels, through the Internet.

True

T/F: WANs can connect BNs across distances that can span up to thousands of miles.

True

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. a. Bridged backbone b. Virtual LAN c. Hubbed backbone d. Collapsed backbone e. Routed backbone

Virtual LAN

Which of the following is a fundamental backbone network architecture? a. Bridged backbone b. Virtual LAN c. Hubbed backbone d. Gatewayed backbone e. Virtual backbone

Virtual LAN

Circuit capacity on a backbone network will not be improved by: a. going from 100Base-T Ethernet to 10Base-T Ethernet b. going from 100Base-T Ethernet to gigabit Ethernet c. adding additional circuits alongside heavily used ones d. replacing a shared circuit backbone with a switched circuit backbone e. providing a faster circuit to the server

a. Going from 100Base-T Ethernet to 10Base-T Ethernet

VLANs prioritize traffic based on the __________. a. IEEE 802.1q standard b. IEEE 802.11 standard c. VLAN size d. multiswitch allocation e. switch dynamics

a. IEEE 802.1q standard

In a ring design WAN, a. failure in one circuit means that the network can most likely continue to function b. failure in one circuit always means that the network will cease to function c. failure in one computer always means that the network will cease to function d. failure in one circuit means that there will not be any increased traffic delays in the network e. failure in one computer always means that messages will stop at that computer since it would be impossible to re-route traffic

a. failure in one circuit means that the network can most likely continue to function

Which of the following is not a way that a router differs from a switch? a. routers can connect two or more networks that use the same data link protocol b. routers only process messages that are specifically addressed to it c. routers operate at the network layer d. routers perform more processing on each message than switch e. routers can choose the "best" route between networks for forwarding a packet

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

Which of the following would be least effective in improving backbone performance? a. upgrading memory for devices in the network b. changing the demand placed on the network c. adding new keyboards to the client computers d. upgrading the circuits between devices e. improving devices in the network

adding new keyboards to the client computers

Associated with a switched backbone, MDF is an acronym for: a. multi-station device foundation b. main distribution facility c. manual data frequency d. multiplexer downstream flow e. maximum data facility

b. main distribution facility

Which of the following is not a basic architecture for dedicated circuit networks? a. ring b. partial mesh c. bus d. star e. full mesh

bus

A star architecture: a. connects all computers in a closed loop b. connects all computers off a backbone circuit c. connects all computers to one central computer that routes messages to the appropriate computer d. all of the above e. none of the above

c. connects all computers to one central computer that routes messages to the appropriate computer

Network demand will not be reduced by: a. restricting (or moving) applications such as desktop videoconferencing b. using network devices to ensure that broadcast messages do not go to other networks c. encouraging the use of applications such as medical imaging d. sending status information to all computers on all LANs in the backbone network e. restricting (or moving) applications such as multimedia

c. encouraging the use of applications such as medical imaging

Which of the following is not true about switched backbones? a. network latency (delay) is decreased in comparison to traditional (bridged or routed) backbone networks b. each connection into the switch is a separate point-to-point circuit which supports simultaneous access by the LANs connected to the switch c. there are many more networking devices in a switched backbone network compared to the number of LANs attaching to it d. use a star topology e. the backbone essentially exists in the switch; there is no backbone cable

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

Which of the following would not be part of an "ideal" backbone design? a. access layer composed of 10/100 layer 2 Ethernet switches b. distribution layer composed of layer 3 Ethernet switches of 100 (or 1000) Base-T c. redundant switches d. core layer composed of layer 3 Ethernet switches running 10 (or 40) GbE over fiber e. coax cabling throughout LANs and BN

coax cabling throughout LANs and BN

Routers: a. connect different IP networks or subnetworks b. typically do not require any configuration by the network administrator c. use data link layer addresses to move packets that leave the subnet d. typically require only one TCP/IP address e. do less processing on packets than a layer 2 switch does

connect different IP networks or subnetworks

The biggest drawbacks to VLANs are their __________. a. cost and management complexity b. size and contention c. contention and cost d. learning curve and contention e. speed and size

cost and management complexity

Device performance on a backbone network will not be improved by: a. using the same protocols in the backbone and the LANs b. using static routing in low to moderate traffic conditions c. ensuring that backbone devices have sufficient memory so that packets do not have to be retransmitted by the sender d. translating packets from one protocol to another as they enter the BN e. none of the options

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

Which of the following is not a technology layer that is considered when designing backbone networks? a. access layer b. distribution layer c. decentralized layer d. core layer e. none of the options

decentralized layer

A star topology is: a. difficult to manage because the central computer receives and routes all messages in the network b. dependent upon the capacity of the central computer for its performance c. always slower than a ring network d. less susceptible to traffic problems than other architectures e. not affected if the central computer fails

dependent upon the capacity of the central computer for its performance

Which of the following is not true about Layer-3 switches? a. They switch messages based on their IP address. b. They can be used in place of routers. c. They function faster than routers. d. They have more simultaneously active ports than routers. e. They can only switch messages based on their data link layer addresses.

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

Which of the following would not be part of an "ideal" backbone design for the future? a. access layer composed of 10/100 layer 2 Ethernet switches b. distribution layer composed of layer 3 Ethernet switches of 100 (or 1000) Base-T c. redundant switches d. core layer composed of layer 3 Ethernet switches running 10 (or 40) GbE over fiber e. coax cabling throughout LANs and BN

e. coax cabling throughout LANs and BN

In ______ geometric layout for a network, every computer is connected to every other computer often by point-to-point dedicated circuits. a. full mesh design b. ring design c. star design d. bus design e. partial mesh design

full mesh design

SONET: a. is a standard for optical transmission that currently operates at Terabit per second speeds b. is almost identical to the ITU-T standard, synchronous digital hierarchy (SDH) c. uses existing copper cabling and the PSTN network d. refers to Sprint Overall Network e. is not currently available, even in large cities

is almost identical to the ITU-T standard, synchronous digital hierarchy (SDH)

Routers: a. operate at the application layer b. operate only at the physical layer c. cannot connect two or more networks that use the same type of cable d. may also be called TCP/IP gateways e. operate only at the data link layer

may also be called TCP/IP gateways

In a ring design WAN, a. messages can take a long time to travel from the sender to the receiver b. a message arrives at all computers on the network simultaneously c. messages always arrive faster than in other types of layouts d. messages are delivered directly from sender to receiver because there is a point-to-point connection directly between each sender and each receiver e. messages always take one second to travel between sender and receiver

messages can take a long time to travel from the sender to the receiver

Which of the following type of networks permit packets from separate messages to be interleaved? a. circuit switched network b. dedicated circuit network c. dial up circuit network d. packet switched network e. Fractional T-1 network

packet switched network

A ________ geometric layout connects all computers in a closed loop, with each computer linked to the next usually with a series of point-to-point dedicated circuits. a. bus design b. star design c. full mesh design d. ring design e. partial mesh design

partial mesh design

Devices in a rack are connected together using __________. a. patch cables b. string c. servers d. modules e. chassis switches

patch cables

A __________ is a connection-oriented approach to sending packets on a packet switched service. a. permanent virtual circuit b. datagram c. histogram d. bursty packet e. fractional T-1 network

permanent virtual circuit

With a switched backbone network, the equipment is usually placed in a __________. a. server b. NIC c. cabinet d. basement e. rack

rack

Routers: a. require more management than switches b. are not susceptible to time delays c. use data link layer addresses to move packets that leave the subnet d. require only a few set of TCP/IP addresses e. don't need much time to establish separate subnet addresses for each LAN

require more management than switches

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. a. bridged backbone b. virtual LAN c. hubbed backbone d. collapsed backbone e. routed backbone

routed backbone

A __________ geometric layout for a WAN connects all computers to one central computer that routes messages to the appropriate computer, usually via a series of point-to-point dedicated circuits. a. ring design b. mesh design c. bus design d. star design e. mesh design

star design

With a virtual private network, users create permanent virtual circuits through the Internet called: a. bursts b. cells c. tunnels d. rings e. clouds

tunnels

Switched backbone networks: a. always use a ring topology b. are the least common type of BN used in one building c. use a star topology with one device, usually a switch d. switch the traffic based on layer 3 addresses e. require much more management that do routed backbone networks

use a star topology with one device, usually a switch

Switched backbone networks: a. always use a ring topology b. are the least common type of BN used in one building c. use a star topology with one device, usually a switch d. have a great deal of cable in their backbones e. tend to have less cable, but more network devices

use a star topology with one device, usually a switch