EXAM 2 - Ch. 8

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

A. access layer

Which of the following devices is the most complex? a. Gateway b. Router c. Layer 3 switches d. Switch e. Multiprotocol router

A. gateway

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

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

A. learn addresses by reading the source and destination addresses

____________ routers can understand different network layer protocols. a. Multiprotocol b. 3270 emulation c. ASCII/EBCDIC d. Asynchronous e. Bridge-

A. multiprotocol

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

A. patch cables

Routed backbones: a. require a lot of management 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

A. require a lot of management

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

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

A. switched backbones

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

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

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

B. Distribution Layer

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

B. 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

B. Virtual LAN

Gateways: a. process all messages, even if the messages are not explicitly addressed to them b. can translate one network protocol into another c. are less complex than bridges d. are most often used as the interface between two or more networks that have similar data link and network layer protocols e. cannot perform a routing function

B. can translate one network protocol into another

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

__________ refers to the way in which backbone interconnects the network attached to it and how it manages the way in which packets from one network move though the backbone to other networks. a. Traffic architecture b. Network design c. Backbone architecture d. Distribution layer e. Core layer

C. Backbone architecture

A _____connects all networks within a company, regardless of whether it crosses state, national, or international boundaries. a.) LAN b.) MAN c.) enterprise network d.) campus network e.) core network

C. Enterprise network

Which of the following can connect two different networks that utilize the same or different data link and network layer protocols as well as the same or different cable type? a.) Switch b.) Router c.) Gateway d.) Hub e.) NIC

C. Gateway

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

C. adding new keyboards to the client computers

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

C. core layer

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 above

C. decentralized layer

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

Computers are 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

C. physical port on the switch

Which of the following is not true about switched backbones? a. performance is improved over 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 d. if the switch fails, so does the entire backbone network e. the backbone essentially exists in the switch; there is no backbone cable

C. there are many more networking devices in a switched backbone newtwork

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

C. use a star topology with one device, usually a switch

Which of the following is not a type of hardware device that can be used to interconnect networks? a. switches b. routers c. multiprotocol routers d. 'dumb' terminals e. gateways

D. 'dumb' terminals

Which IEEE standard inserts a 16-byte VLAN tag into a normal Ethernet packet? a. 802.11 b. 802.5 c. 803.3 d. 802.1q e. 802.11g

D. 802.1q

It appears that the use of _____ is decreasing in backbones while the use of ____ is increasing. a.) WLAN, ATM b.) Ethernet, ATM c.) IEEE 802.1q, ATM d.) ATM, Ethernet e.) 10GbE, Ethernet

D. ATM, Ethernet

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

D. QoS

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 above

D. Translating packets from one protocol to another as they enter the BN

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

D. may also be called TCP/IP gateways

_________ 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

D. routed backbones

A __________ type of BN has a star topology with one device, such as a switch, at its center. a. Bridged backbone b. Virtual LAN c. Hubbed backbone d. Switched backbone e. Routed backbone

D. switched backbone

Which of the following is not true about multi-switch 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.

E. all of the above are true statements

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

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

E. rack

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

E. 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

E. routed backbone

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 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.

E. they tend to use lower speed circuits than LANs