Data Comm
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| 1. Routers operate at which layer? a. application b. network c. layer 4 d. transport | B. network
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| 2. Routers always connect two or more network segments that... a. use the same network layer protocol b. use the same transport layer protocol c. are between two firewalls d. buy each other doughnuts | A. use the same network layer protocol
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| 3. gateways are... a. simpler than routers b. more complex than routers c. pretty much the same thing as routers d. are completely different from routers. | B. more complex than routers
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| 4. the distrubution layer of a backbone network... a. converts traffic to a more efficient protocol b. connects two LAN segments together c. translates two protocols d. chooses the best path for frames | B. connects to LAN segments
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| 5. what is another name for the MDF in collapsed backbone architecture? a. central distribution facility b. common distribution facility c. common designated faclility d. central designated facility | A. central distribution facility
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| 6. collapsed backbone architecture uses which physical topology? a. bus b. ring c. star d. mesh | C. star
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| 7. collapsed backbone architecture uses which logical topology? a. bus b. ring c. star d. mesh | C. star
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| 8. what protocol uses a label switched router (LSR)? a. token ring b. ethernet c. ATM d. MPLS | D. MPLS
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| 9. Gateways an connect networks with... a. different layer 1, 2, and 3 protocols b. different layer 1 and 2 protocols, same layer 3 c. different layer 1, same 2 and 3 d. SAME layer one, different 2 and 3 | A. Different layer 1, 2, and 3 protocols
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| 10. switches can connect networks with... a. different layer 1, 2, and 3 protocols b. different layer 1 and 2 protocols, same layer 3 c. different layer 1, same 2 and 3 d. SAME layer one, different 2 and 3 | C. different layer 1, same layer 2 and 3 protocols
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| 11. routers can connect networks with... a. different layer 1, 2, and 3 protocols b. different layer 1 and 2 protocols, same layer 3 c. different layer 1, same 2 and 3 d. SAME layer one, different 2 and 3 | B. different layer 1 and 2, same layer 3
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| 12. which of the following is an advantage of VLANs? a. they take more work to maintain than non-VLAN networks. b. they aid in limiting broadcast traffic c. they are faster than non-VLANnetworks d. they allow RARP over DNS 803.90 with PGP WCCO. | B. they aid in limiting broadcast traffic.
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| 13. which of the following is not true about backbonenetworks? a. they may be called enterprise networks if they connect all networks in an organization. b. they can connect many networks, including LANs. c. can provide connections to other BN,WAN,MAN, | D. tend to use lower speed circuits than LANs
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| 14. how do switches build their MAC table? a. reading source and destination addresses on passing frames b. ARPing for each MAC it hears from c. ARPing for each MAC is hasn't heard from. d. requesting it from the internet | A. reading source and destination addresses on passing frames
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| 15. routers will not work between two networks if... a. the cabling is different b. the ATM is SSL c. the physical addressing is different d. one is IP and the other is IPX | D. one is IP and the other is IPX
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| 16. which of the following is not true about routers? a. routers only process messages addressed to it b. routers operate at the transport layer c. routers require more processing that a switch d. routers choose the "best" route between networks | B. routers operate at the transport layer
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| 17. ___ routers can understand different network layer protocols. a. multiprotocol b. 3270 emulation c. ASCII/EBCDIC d. asynchronous | A. Multiprotocol
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| 18. which of the following is not true about layer 3 switches? a. switch messages based on their IP address b. function faster than routers. c. have more simultaneously active ports than routers d. they can only switch messages based on data link addr | D. they can only switch messages based on their data link layer addresses
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| 19. of the following devices is the most complex? a. gateway b. router c. layer 3 switches d. multiprotocol router | A. gateway
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| 20. which of the following is not a layer of backbone architecture? a. core b. distribution c. delegation d. access | C. delegation
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| 21. ____ refers to the way backbone interconnects the networks attached to it and how it manages the way in which packets travel the backbone a. traffic architecture b. backbone architecture c. distribution layer d. core layer | B. backbone architecture
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| 22. _____ move packets along the backbone based on their network layer address a. bridged backbones b. hubbed backbones c. routed backbones d. NIC backbones | C. routed backbones
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| 23. which is true about switched backbones? a. they place all network devices for one part of the building in a rack b. make it more difficult to move computers c. network capacity is tied to physical location d. harder to maintain than non rack base | A. they place all devices for one part of the building physically in the same room, often in a rack of equipment
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| 24. A ___ allows an administrator to segment a network with software rather than hardware a. backbone b. VLAN c. gateway d. multiprotocol gateway | B. VLAN
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| 25. Which IEEE standard inserta a 16byte VLAN tag into a normal ethernet packet a. 802.11 b. 803.3 c. 802.1 d. 802.11g | C. 802.1q
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| 26. the backbone architecture layer that is closest to the users is the a. access layer b. distribution layer c. core layer d. privacy layer | A. access layer
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| 27. the ___ is the part of the backbone that connects the LANs together. a. access layer b. distribution layer c. core layer d. privacy layer | B. distribution layer
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| 28. ___ 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 (?)
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| 29. 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. tend to haveless cable, but more network devices | C. use a star topology with one device, usually a switch
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| 30. which of the following is not true about switched backbones? | E. the backbone essentially exists in the switch; there is no backbone cable
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| 31. 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.
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| 32. Associated with a switched backbone, MDF is an acronym for : | B. main distribution facility
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| 33. 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. | B. Virtual LAN
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| 34. which IEEE standard inserts a 16byte VLAN tag into a normal Ethernet packet? | D. 802.1q
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| 35. which of the following is not true about multi switch VLANs? | E. All of the above (Chapter 8)
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| 36. Which of the following would be least effective in improving backbone performance? | C. adding new keyboards to the client computers
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| 37. Circuit capacity on a backbone network will not be improved by: | A. going from 100baseT ehternet to 10baseT ethernet
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| 38. device performance on a backbone network will not be improved by: | D. translating packets from one protocol to another as they enter the BN
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| 39. Network demand will not be reduced by: | C. encouraging the use of applications such as medical imaging
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| 40. which of the following would not be part of an "ideal" backbone design for the future? | E. coax cabling throughout LANs and BN
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| 41. Which of the following can connect two different networks that utilize the same or different datalink and network layer protocols as well as the same or different cable type? | C. gateway
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| 42. the backbone architecture layer that is closest to the users is the _______ | A. access layer
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| 43. the ___ is the part of the backbone that connects the LANs together. | B. distribution layer
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| 44. the ___ is the part of the backbone that connects the different backbones together? | C. Core layer
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| 45. with a switched backbone network, the equipment is usually placed in a ____. | E. rack
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| 46. Devices in a rack are connected together using _______. | A. patch cables
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| 47. 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 sent and receive voice messages. | D. QoS
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| 48. Computers are assigned to a VLAN based on the _________. | C. Physical port on the switch
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| 49. It appears that the use of _______ is decreasing tin backbones while the use of ____ is incereasing. | D. ATM, Ethernet
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| 50. A ____ connects all networks within a company, regardless of whether it crosses state, national, or international boundaries. | C. enterprise network
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