In this particular topic you have learned Wireless LANs, the newest evolution in LAN technology. This chapter discuss the two promising wireless technologies for LANs: IEEE 802.11 wireless LANs, sometimes called wireless Ethernet, and Bluetooth, a technology for small wireless LANs. If you skip the summary visit Wireless LANs .
Begin and Good luck!
- The original IEEE 802.11, has a data rate of _____Mbps.
- A) 11
- B) 22
- C) 6
- D) 1
- In IEEE 802.11, when a frame is going from a station to an AP, the address flag is _____.
- A) 01
- B) 10
- C) 11
- D) 00
- In IEEE 802.11, when a frame is going from one station in a BSS to another without passing through the distribution system, the address flag is _____.
- A) 11
- B) 00
- C) 10
- D) 01
- In IEEE 802.11, the access method used in the PCF sublayer is ______.
- A) polling
- B) controlled
- C) contention
- D) none of the above
- In IEEE 802.11, a BSS without an AP is called an _________.
- A) an infrastructure network
- B) an ad hoc architecture
- C) either (a) or (b)
- D) neither (a) nor (b)
- In IEEE 802.11, the addressing mechanism can include up to ______addresses.
- A) six
- B) five
- C) four
- D) none of the above
- In Bluetooth, the _______ layer is roughly equivalent to the physical layer of the Internet model.
- A) baseband
- B) radio
- C) L2CAP
- D) none of the above
- In IEEE 802.11, a station with ________ mobility is either stationary (not moving) or moving only inside a BSS.
- A) ESS-transition
- B) no-transition
- C) BSS-transition
- D) none of the above
- In Bluetooth, the L2CAP sublayer, is roughly equivalent to the LLC sublayer in LANs.
- A) baseband
- B) L2CAP
- C) radio
- D) none of the above
- In IEEE 802.11, when a frame is going from one AP to another AP in a wireless distribution system, the address flag is _____.
- A) 10
- B) 01
- C) 11
- D) 00
- A Bluetooth network is called a ________.
- A) scatternet
- B) bluenet
- C) piconet
- D) none of the above
- A Bluetooth network consists of _____ primary device(s) and up to ____ secondary devices.
- A) one; seven
- B) one; five
- C) five; three
- D) two; six
- In Bluetooth, the current data rate is ____Mbps.
- A) 11
- B) 5
- C) 2
- D) none of the above
- In IEEE 802.11, a BSS with an AP is sometimes referred to as ____________.
- A) an infrastructure network
- B) an ad hoc architecture
- C) either (a) or (b)
- D) neither (a) nor (b)
- In IEEE 802.11, the ______ is a timer used for collision avoidance.
- A) BSS
- B) ESS
- C) NAV
- D) none of the above
- In IEEE 802.11, the MAC layer frame has ______ fields.
- A) four
- B) six
- C) five
- D) none of the above
- Bluetooth uses ______method in the physical layer to avoid interference from other devices or other networks.
- A) FHSS
- B) DSSS
- C) FDMA
- D) none of the above
- In Bluetooth, the _____ link is used when data integrity is more important than avoiding latency.
- A) SCL
- B) ACO
- C) ACL
- D) SCO
- In Bluetooth, the _____layer is roughly equivalent to the MAC sublayer in LANs.
- A) L2CAP
- B) radio
- C) baseband
- D) none of the above
- IEEE has defined the specifications for a wireless LAN, called _______, which covers the physical and data link layers.
- A) IEEE 802.5
- B) IEEE 802.11
- C) IEEE 802.2
- D) IEEE 802.3
- In IEEE 802.11, a station with ________ mobility can move from one ESS to another.
- A) BSS-transition
- B) ESS-transition
- C) no-transition
- D) none of the above
- The IEEE 802.11g, uses _________.
- A) DSSS
- B) OFDM
- C) FHSS
- D) either (a) or (c)
- In IEEE 802.11, the access method used in the DCF sublayer is _________.
- A) CSMA/CA
- B) CSMA/CD
- C) ALOHA
- D) none of the above
- The RTS and CTS frames in CSMA/CA ____ solve the hidden station problem. The RTS and CTS frames in CSMA/CA ____ solve the exposed station problem.
- A) cannot; cannot
- B) can; cannot
- C) cannot; can
- D) can; can
- In IEEE 802.11, communication between two stations in two different BSSs usually occurs via two ________.
- A) ESSs
- B) APs
- C) BSSs
- D) none of the above
- Bluetooth is a _______ technology that connects devices (called gadgets) in a small area.
- A) VLAN
- B) wired LAN
- C) wireless LAN
- D) none of the above
- The original IEEE 802.11, uses _________.
- A) FHSS
- B) OFDM
- C) DSSS
- D) either (a) or (c)
- The IEEE 802.11a, uses _________.
- A) DSSS
- B) OFDM
- C) FHSS
- D) either (a) or (c)
- In IEEE 802.11, a ___ is made of stationary or mobile wireless stations and an optional central base station, known as the access point (AP).
- A) BSS
- B) CSS
- C) ESS
- D) none of the above
- The IEEE 802.11 standard for wireless LANs defines two services: ______ and _______.
- A) ESS; SSS
- B) BSS; ESS
- C) BSS; ASS
- D) BSS; DCF
- In Bluetooth, the _____ link is used when avoiding latency (delay in data delivery) is more important than integrity (error-free delivery).
- A) SCL
- B) ACL
- C) ACO
- D) SCO
- IEEE 802.11b, has a data rate of _____Mbps.
- A) 5.5
- B) 2
- C) 1
- D) none of the above
- IEEE 802.11g, has a data rate of _____Mbps.
- A) 22
- B) 11
- C) 2
- D) 1
- In IEEE 802.11, a station with ________mobility can move from one BSS to another, but the movement is confined inside one ESS.
- A) ESS-transition
- B) no-transition
- C) BSS-transition
- D) none of the above
- The access method in Bluetooth is ________.
- A) TDD-TDMA
- B) CDMA
- C) FDMA
- D) none of the above
- The IEEE 802.11 wireless LANs use ________ types of frames.
- A) five
- B) six
- C) four
- D) none of the above
- In IEEE 802.11, _______ is an optional access method that can be implemented in an infrastructure network (not in an ad hoc network).
- A) PCF
- B) DCF
- C) either (a) or (b)
- D) neither (a) nor (b)
- In IEEE 802.11, when a frame is coming from an AP and going to a station, the address flag is _______.
- A) 00
- B) 11
- C) 10
- D) 01
- In Bluetooth, multiple ________ form a network called a _________.
- A) piconets: bluenet
- B) scatternet; piconets
- C) piconets: scatternet
- D) bluenet; scatternet
- The IEEE 802.11b, uses _________.
- A) OFDM
- B) FHSS
- C) DSSS
- D) either (a) or (b)
- IEEE 802.11a, has a data rate of _____Mbps.
- A) 6
- B) 2
- C) 1
- D) none of the above
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credit: Behrouz A. Forouzan©2013 www.FroydWess.com
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