Chapter 7

1. Perhaps the strongest advantage of a local area network is its capability of allowing users to share hardware and software resources.

2. The local area network first appeared in the 1950s.

3. By keeping all of the application on the server, the network can control access to the software and can reduce the amount of disk storage required on each user's workstation for this application.

4. A local area network cannot interface with other local area networks.

5. Most modern local area networks provide the capabilities of transferring video images and video streams.

6. One of the biggest advantages of local area networks is their ability to share resources in an economical and efficient manner.

7. A local area network is only as strong as its strongest link.

8. The bus/tree topology was the first physical design used when local area networks became commercially available in the late 1970s.

9. Baseband signaling typically uses multiple digital signals to transmit data over the bus.

10. All bus networks share a major disadvantage: In general, it is difficult to add a new workstation if no tap currently exists.

11. Hubs support only twisted pair cable for interhub connection.

12. With the CSMA/CD protocol, only one workstation at a time can transmit.

13. If the network is experiencing a high amount of traffic, the chances for collision are small.

14. The most popular example of a contention-based protocol is the token-passing protocol.

15. The hub, in most applications, has been replaced with the switch.

16. A hub is a simple device that requires virtually no overhead to operate.

17. Most switches are transparent, which means they learn by themselves.

18. Switches can significantly decrease interconnection traffic and increase the throughput of the interconnected networks or segments.

19. A hub is designed to perform much faster than a switch.

20. A cut-through switch does not store a data frame and then forward it.

21. In a shared segment network, each workstation then has a private or dedicated connection.

22. Switches can be used in combination with routers to further isolate traffic segments in a local area network.

23. The logical link control sublayer defines the layout or format of the data frame, simply called the frame.

24. Three of the most popular local area network systems are Ethernet, IBM Token Ring, and Wireless Ethernet.

25. The term "Base", such as in 100BaseT, is an abbreviation for baseband signals using a Manchester encoding.

26. Using coaxial cable to transmit analog signals, 10Broad36 can transmit data at 10 Mbps for a maximum segment distance of 3600 meters.

27. The Fast Ethernet standards are based on 1000-Mbps transmission speeds, or 1 gigabit (1 billion bits) per second.

28. 1000BaseSX was the first Gigabit Ethernet standard.

29. 1000BaseT is capable of using only the Category 7 cable specification.

30. "Wireless Ethernet" is a local area network that is not based primarily on physical wiring but uses wireless transmissions between workstations.

31. A rule known as the 5-4-3 rule helps guide the design of a shared-access Ethernet.

32. The SOHO LAN (small office home office) is one the fastest growing segments of the networking market.

33. In the case of CSMA/CD local area networks, as the networks grow in size, their performance increases.

34. Wireless local area networks are typically found in seven basic configurations.

35. In the wireless LAN ad hoc layout configuration, each user device communicates directly with the other user devices.

36. The 802.11 specification defined six different types of physical layer connections.

1. Early local area networks transmitted data at only ____ million bits per second. a. 1 c. 100 b. 10 d. 1000

2. A local area network performs file serving when it's connected to a workstation with a large storage disk drive that acts as a central storage repository, or ____ server. a. file c. Database b. printer d. Application

3. The local area network software called a ____ server provides workstations with the authorization to access a particular printer, accepts and queues prints jobs, prints cover sheets, and allows users access to the job queue for routine administrative functions. a. Application c. file b. database d. print

4. The ____ topology consists of a simple cable, or bus, to which all devices attach. a. bus/tree c. ring star b. token ring d. star

5. In a bus/tree topology, connecting to the cable requires a simple device called a(n) ____. a. hub c. Tap b. router d. echo suppressor

6. Two different signaling technologies can be used with a bus network: baseband signaling and ____ signaling. a. multiband c. Uniband b. broadband d. Singleband

7. More complex bus topologies consisting of multiple interconnected cable segments are termed ____. a. tokens c. Rings b. stars d. Trees

8. The most popular configuration for a local area network is the ____ topology. a. ring c. Bus b. star-wired bus d. tree

9. The ____ design of a network determines how the data moves around the network from workstation to workstation. a. electrical c. physical b. data d. logical

10. ____ cabling has become the preferred medium for star-wired bus topologies. a. Twisted pair c. Fiber-optic b. Coaxial d. FDDI

11. When two or more hubs are interconnected and a workstation transmits data, all the workstations connected to all the hubs receive the data. This is an example of a(n) ____. a. wireless topology c. shared network b. switched network d. FDDI topology

12. A local area network that is not based primarily on physical wiring but uses wireless transmissions between workstations is a(n) ____. a. FDDI c. token ring b. wireless LAN d. MAU

13. The ____ is essentially the interface device between the wireless user device and the wired local area network. a. wireless server c. NIC b. wireless workstation d. access point

14. In the ____ layout configuration, multiple cells are supported by multiple access points, as in a cellular telephone network. a. multiple-cell c. one-cell b. single-cell d. unique-cell

15. The wireless LAN term for a collection of multiple Basic Service Sets is ____. a. Multiple Service Set (MSS) c. Extended Service Set (ESS) b. Basic Service Set (BSS) d. Complex Service Set (CSS)

16. In the ____, or ad hoc, layouts configuration, there is no access point at the center of a cell. a. peer-to-peer c. single-cell b. multiple-cell d. random-cell

17. ____, a European standard, is capable of transmitting data at a theoretical 54 Mbps using the 5-GHz frequency range. a. WiMAX c. WiLAN/3 b. HiperLAN/2 d. WiFi/8

18. A(n) ____ protocol is the software that allows a workstation to place data onto a local area network. a. error control c. medium access control b. noise control d. flow control

19. The most popular contention-based protocol is ____. a. token ring b. round-robin c. carrier sense multiple access with collision avoidance (CSMA/CA) d. carrier sense multiple access with collision detection (CSMA/CD)

20. The interval during which the signals propagate down the bus and back is the ____. a. exponential backoff c. Attenuation b. collision window d. bounce window

21. In CSMA/CA, the amount of time a device is made to wait before it can transmit is called the ____. a. frame space (FS) c. interframe space (IFS) b. frame time (FT) d. intraframe time (IFT)

22. The ____ sublayer contains a header, computer (physical) addresses, error-detection codes, and control information. a. logical link control (LLC) c. medium access control (MAC) b. logical flow control (LFC) d. physical link control (PLC)

23. The ____ sublayer is primarily responsible for logical addressing and providing error control and flow control information. a. medium access control (MAC) c. medium physical control (MPC) b. physical access control (PAC) d. logical link control (LLC)

24. ____ was the first commercially available local area network system and remains, without a doubt, the most popular local area network system today. a. Ethernet c. FDDI b. IBM Token Ring d. Wireless Ethernet

25. The ____ standard was one of the first Ethernet standards approved. a. 10Broad36 c. 100BaseTX b. 10Base5 d. 100BaseT4

26. ____ was a system designed for twisted pair wiring, but with only a 1-Mbps data transfer rate for 500 meters. a. 10BaseT c. 100BaseTX b. 10Broad36 d. 1Base5

27. A ____ system transmits 10-Mbps baseband (digital) signals over twisted pair for a maximum of 100 meters per segment length. a. 1Base5 c. 10BaseT b. 10Broad36 d. 100BaseTX

28. IEEE created the 100-Mbps Ethernet 802.3u protocol also called ____ Ethernet. a. Fast c. Terabit b. Gigabit d. FDDI

29. ____ was the standard created for fiber-optic systems. a. 1Base5 c. 100BaseTX b. 10BaseTX d. 100BaseFX

30. The IEEE 802.3z standards are also known as ____ Ethernet. a. Switch c. Gigabit b. Fast d. Terabit

31. With ____, you can send electrical power over the Ethernet connection. a. 1Base5 c. 10GBase-fiber b. power over Ethernet (PoE) d. FDDI

32. The IEEE ____ standard is said to be capable of 100 Mbps wireless transmissions. a. 802.11a c. 802.11g b. 802.11b d. 802.11n

33. The ____ rule states that between any two nodes on a network, there can be a maximum of only five segments (the sections between repeaters), connected through four repeaters, and only three of the five segments may contain user connections. a. 2-4-3 c. 5-4-3 b. 3-4-5 d. 6-5-3

34. The ____ LAN is geared toward the small office or home office. a. SMART c. GRID b. SOHO d. Gigabit

35. The ____ is used to connect local area networks to wide area networks. a. hub c. router b. repeater d. bridge

36. A ____ is a device that interconnects two or more workstations in a star-wired bus local area network and immediately retransmits the data it receives from any workstation out to all other workstations connected. a. hub c. router b. switch d. repeater

37. A ____ is a device that interconnects two segments of local area networks and acts as a filter. a. hub c. Router b. switch d. satellite

38. A transparent bridge creates the internal port table by using a form of ____. a. forward learning c. backward learning b. backward correction d. forward correction

39. The switch operates in place of a ____. a. repeater c. router b. bridge d. hub

40. In a ____ architecture, the data frame begins to exit the switch almost as soon as it begins to enter the switch. a. forward c. cut-through b. backward d. random-propagation

41. If a switch has eight 100-Mbps ports, the backplane has to support a total of ____ Mbps. a. 200 c. 600 b. 400 d. 800

42. Depending on user requirements, a switch can interconnect two different types of CSMA/CD network segments: ____ segments and dedicated segments. a. shared c. Local b. remote d. distributed

43. In ____ segment networks, a switch may be directly connected to a workstation, and the switch connects to the hub. a. shared c. Distributed b. dedicated d. remote

44. One of the more interesting applications for a dedicated segment network and a switch is creating a ____. a. virtual LAN c. shared LAN b. dedicated LAN d. local LAN

45. A relatively new standard, IEEE ____, was designed to allow multiple devices to intercommunicate and work together to create a virtual LAN. a. 802.1a c. 802.1P b. 802.1g d. 802.1Q

46. Whether shared or dedicated segments are involved, the primary goal of a(n) ____ is to isolate a particular pattern of traffic from other patterns of traffic or from the remainder of the network. a. hub c. Repeater b. switch d. amplifier