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WU BU 309 - Study Notes

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Name: __________________________ Date: _____________1. Which of the following is not a WLAN standard?A) 802.15B) 802.11aC) 802.3D) 802.11bE) 802.11g2. Which of the following is not an advantage of a WLAN?A) The ability to use the network in places where it is impractical to install a wired network.B) WLANs enable mobile users to work at different locations within an office buildingand stay connected to the network.C) WLANs enable business travelers to connect the Internet from within waiting areas.D) WLANs allow users to work more securely than a wired LAN.E) WLANs cost less to install and operate in most cases (except new buildings) than wired networks.3. The IEEE designation for the most common type of wireless standard is __________.A) 802.15B) 802.11aC) 802.3D) 802.11bE) 802.11g4. _____________ run at 1Mbps and 2Mbps transmission speeds.A) Direct-Sequence Spread-SpectrumB) Frequency-hopping Spread SpectrumC) Distributed Coordination FunctionD) Point Coordination FunctionPage 1E) Physical Layer Convergence Protocol5. A(n) _____________ is required to connect a computer to WLAN.A) Ethernet NICB) antennaeC) wireless NICD) access pointE) hub6. A(n) ___________ is a radio transceiver that plays the same role as a hub or switch in awired network and connects the WLAN to the wired network.A) Ethernet NICB) antennaeC) wireless NICD) access pointE) hub7. How many channels does the 802.11b standard provide for communication between the access point and clients?A) 4B) 6C) 3D) 11E) 28. How can a set of 802.11b access points be configured to operate without interference?A) assigning each access point a different channel to communicate with clientsB) separate each access point by more than 10 metersC) assign the same channel to no more than two access pointsPage 2D) use omnidirectional antennas on some access points and directional on others.E) none of the above9. __________ antennas transmit the signal in all directions.A) directionalB) microwareC) omnidirectionalD) radioE) vertical10. __________ antennas project a signal in only one direction and are most often used on the inside of an exterior wall pointing to the inside of the building for security reasons.A) directionalB) microwareC) omnidirectionalD) radioE) vertical11. CSMA/CA is an acronym for:A) Carrier Sense Multiple Access with Collision AcknowledgmentB) Carrier Sense Mode Access with Carrier AvoidanceC) Carrier Sense Multiple Access with Collision AvoidanceD) Carrier Sensory Multiple Access without Collision AcknowledgmentE) Carrier Sense Multiple Acknowledgment with Collision Avoidance12. Another name for distributed coordination function (DCF) is __________.A) distributed carrier sense methodB) physical carrier sense methodPage 3C) physical carrier sense modeD) distributed carrier sense modeE) distributed coordination mode13. When a computer transmit at the same time because it cannot sense that another computer on the WLAN is currently transmitting is referred to as the:A) out of range problemB) collision problemC) hidden node problemD) controlled access problemE) media access problem14. At the physical layer, 802.11b uses radio waves which is a form of:A) digital transmissionB) analog transmissionC) binary transmissionD) byte transmissionE) circuit transmission15. __________ refers to the range of frequencies available.A) bandwidthB) frequencyC) phaseD) amplitudeE) broadband16. Which is true about bandwidth?A) Bandwidth and transmission speed are not related.Page 4B) The larger the range of frequencies, the smaller the amount of bandwidth available.C) The greater the bandwidth, the faster we can transmit data.D) Bandwidth is usually measured in bytes/secondE) The sum of the lowest and highest frequencies is the bandwidth.17. The maximum data rate of a an 802.11a WLAN isA) 24 MbpsB) 36 MbpsC) 11 MbpsD) 54 MbpsE) 9 Mbps18. 802.11g is backward compatible with which type of LAN?A) 802.11aB) 802.11bC) 802.15D) 802.3E) 802.519. In the U.S. 802.11g WLANs operate in the ________ band.A) 2.4 GHzB) 2.4 MHzC) 5 GHzD) 5 MHzE) 11 GHz20. How many channels does 802.11g provide for communication with clients,A) 20Page 5B) 12C) 10D) 3-6E) 821. The maximum data rate of an 802.11g WLAN isA) 24 MbpsB) 36 MbpsC) 11 MbpsD) 54 MbpsE) 9 Mbps22. _____ is standardized as IEEE 802.15A) BluetoothB) Wireless EthernetC) Token RingD) FDDIE) VLAN23. The maximum data rate of Bluetooth isA) 2 MbpsB) 4 MbpsC) 1 MbpsD) 11 MbpsE) 5 Mbps24. A Bluetooth network is called ____________.A) WLANPage 6B) PiconetC) LAND) areaE) WAN25. Bluetooth operate in the ________ band.A) 2.4 GHzB) 2.4 MHzC) 5 GHzD) 5 MHzE) 11 GHz26. Which of the following WLANs have the highest efficiency?A) 802.11aB) 802.11bC) 802.11gD) 802.15E) a and c are equally efficient.27. Which wireless standard will become the dominant standard of all the current standards?A) 802.11aB) 802.11bC) 802.11gD) 802.15E) none of the abovePage 728. ___________ are usually provided in hallways and lunchrooms where wired network connectivity is not available and allows employees to work in these areas..A) overlay networksB) BluetoothC) cellular networksD) mobile networksE) Ethernet networks29. Which of the following is not determined by a site survey?A) feasibility of the desired coverageB) potential sources of interferenceC) the security of the WLAND) estimated number of access points needed to provide coverageE) current locations of the wired network into which the WLAN will connect.30. What percentage of overlap in coverage by access points (AP) is needed to provide smooth and transparent roaming from AP to AP.A) 25 %B) 15 %C) 50 %D) 40 %E) 60 %31. _____________ refers to practice of writing symbols in chalk on sidewalks and walls to indicate the presence of an unsecured WLAN.A) wardrivingB) chalkingC) warchalkingD) markingPage 8E) identifying32. The most common type of wireless security is __________ .A) EAP.B) SSIDC) WEPD) EWEPE) SWEP33. When an access point configured to use EAP discovers a new client, the access point::A) issues a WEP key to the clientB) asks the client to provide a WEP keyC) requires the user authenticate against a login serverD) grants the client access to the networkE) none of the above34. A major difference between Wi-Fi Protected Access (WPA) and WEP or EAP isA) WPA keys are longer than WEP keys.B) WPA keys are encryptedC) WPA keys cannot be broken by a brute force attackD) WPA keys easier to manageE) WEP keys are changed for every packet that is transmitted to the client. Page


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