Backbone Networks Testbank Part 1

Backbone Networks True-False Questions The following are possible True/False questions for tests. The statement is given and the answer provided. The level of difficulty (easy, medium, hard), the reference section relevant to the topic, and learning objective are also furnished. 1. A backbone network is a high-speed network that connects many networks. Answer: True 2. Backbone networks typically use lower speed circuits to interconnect a series of LANs and provide connections to other backbone networks. Answer: False 3. A backbone network that connects many backbone networks spanning several buildings at a single location is often called an Internet backbone. Answer: False 4. One basic component of a backbone network is the hardware device that connects other networks to the backbone. Answer: True 5. Switches and routers are devices that can connect networks to the BN. Answer: True 6. The cable to connect BNs is usually twisted pair. Answer: False 7. A hardware device that operates at the application layer is a router. Answer: False 8. Routers can only connect the same type of cable. Answer: False 9. Routers use network layer address to forward packets between network segments. Answer: True 10. Routers operate at the application layer. Answer: False 11. Routers connect two or more network segments that use the same or different data link protocols, but the same network protocol. Answer: True 12. 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. Answer: True 13. Layer-3 switches switch messages based only on their data link layer address. Answer: False 14. Routed backbones use switches that move packets based on data link layer addresses. Answer: False 15. The distribution layer of a backbone connects LANs together. Answer: True 16. 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. Answer: True 17. One advantage of a routed backbone is that is requires little management. Answer: False 18. 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. Answer: True 19. A switched backbone uses a bus topology Answer: False 20. 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). Answer: True 21. A key advantage of a chassis switch is its flexibility. Answer: True 22. A VLAN network assigns computers to LAN segments by hardware. Answer: False 23. 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. Answer: False 24. VLANs provide faster performance compared to switched, collapsed or routed backbone architectures. Answer: True 25. Many routers have more sophisticated ACL software that enables the ACL to have different rules for different interfaces, Answer: True 26. Backbone networks may also be called enterprise networks if they connect all networks within an organization. Answer: True 27. Backbone networks typically connect many networks, including LANs. Answer: True 28. Backbone networks typically provide connections to other BNs, WANs, MANs, and the Internet. Answer: True 29. Backbone networks may also be called campus networks if they connect many BNs spanning several buildings as a single location. Answer: True 30. Backbone networks are rarely used anymore. Answer: False 31. Backbone networks tend to use lower speed circuits than LANs. Answer: False 32. Switches learn addresses by reading the source and destination addresses. Answer: True 33. Switches operate at the physical layer only. Answer: False 34. Switches connect two or more network segments that use different data link protocols. Answer: False 35. Switches connect two or more network segments that use different network protocols. Answer: False 36. Switches have become less popular than hubs. Answer: False 37. Switches are software devices. Answer: False 38. Layer-3 switches switch messages based on their IP address. Answer: True 39. Layer-3 switches can be used in place of routers. Answer: True 40. Layer-3 switches function slower than routers. Answer: False 41. Layer-3 switches have more simultaneously active ports than routers. Answer: True 42. Layer-3 switches can only switch messages based on their data link layer addresses. Answer: False 43. With switched backbones, network latency (delay) is decreased in comparison to traditional (bridged or routed) backbone networks. Answer: True 44. With switched backbones, each connection into the switch is a separate point-to-point circuit, which supports simultaneous access by the LANs connected to the switch. Answer: True 45. With switched backbones, there are many more networking devices in a switched backbone network compared to the number of LAN.s attaching to it. Answer: False 46. Switched backbones use a star topology. Answer: True 47. With switched backbones, the backbone essentially exists in the switch; there is no backbone cable. Answer: True 48. Switched backbones place all network devices for one part of the building physically in the same room, often in a rack of equipment. Answer: True 49. Switched backbones have an advantage of requiring less cable. Answer: False 50. Switched backbones make it more difficult to move computers from one LAN to another. Answer: False