Networking

ITEC325 Final Study Guide True/False Indicate whether the sendence or account is true or false. ____1. The value of floors in the OSI reference model is that it divides neting into a series of tasks, and then illustrates how those tasks relate to each other. ____2. When transmitting with FHSS, if stoppage is en runered on a spellicular frequency then that part of the signal bequeath be retransmitted on the previous frequency of the hopping decree. ____3. Increasing the speed of the WLAN will cause shorter delays in delay for reflections. ____4.Because tuner technology has advanced at such a rapid pace, the earliest WLANs are now essentially obsolete. ____5. Of the 52 sub shifts, 32 are use for standard contagious diseases and 20 are used for FEC contagions. ____6. When an ESS is installed it is desirable to configure the areas of coerage much like cells in a cellular telephone system. ____7. The first major function of the mac grade involves defining procedures for a wir eless device to discover the WLAN. ____8. piano tuner authentication involves a substance abuser logging on to the memory access point. ____9. CSMA/CA eliminates the possibility of collisions. ____10.A home agent is a forwarding mechanism that keeps track of where the mobile computer is located. ____11. Wireless access to ne bothrk resources rat improve the quality and productivity of meetings. ____12. Early adopters of wireless LANs were some metres called racehorses. ____13. Several vendors are working on comprehensive cyberspace management solutions that integrate wireless networks into the analogous deployment, operations, and management as a wired network. ____14. When considering the number of users who will be associated with an access point, it is provided necessary to count the number of users, not the type of work they do. ___15. Establishing and staffing an internal help desk is one of the most effective means of support. ____16. It is important to evaluate the pl acement of the access points and antennas end-to-end the proposed site in order to meet the design goals. ____17. The most common type of antenna for a WLAN is an semi-directional antenna, also known as a dipole antenna. ____18. A drawback of spectrum analyzers is that the data is displayed in graphical form and not as raw data. ____19. The industry-standard form for site assess accompaniment is IEEE 802. 11D. ____20.The first mensuration in collecting RF information is to position the access point in what may appear to be the most logical location. Multiple pick Identify the letter of the choice that best completes the statement or answers the question. ____21. What is the top layer of the OSI reference model? a. application c. physical b. presentation d. transport ____22. Which layer of the OSI reference model permits the devices on the network to hold ongoing communications across the network? a. presentation c. transport b. session d. network ____23. ___ signals by constitution transmit on only one frequency or a very narrow portion of the frequencies. a. Broad deal c. Radio b. Computer d. Heat ____24. What is a disadvantage of narrowband transmissions? a. requires a complicated algorithm c. expensive to implement b. not well regulated d. interference from another radio signal ____25. When was the concept used by FHSS technology developed? a. during World War I c. in the 1960s b. during World War II d. in the 1980s ____26. In FHSS, the tot of time needed to move from one frequency to another is the ____ time. . dwell c. lift b. switch d. hop ____27. According to FCC regulations, all FHSS systems in the 900 MHz band must change frequencies through and through 50 channels and cannot spend more than ____ on one frequency each 20 seconds. a. 20 milliseconds c. 400 milliseconds b. 30 milliseconds d. 1 second ____28. Bluetooth divides the 2. 4 GHz frequency into ____ different frequencies spaced 1 GHz apart. a. 52 c. 79 b. 68 d. 93 ____29. ____ is not part of a frame. a. Length c. Channel b. Parity d. Data ____30. How does OFDM work? a. signals are broken up and the parts are sent in parallel b. the same signal is sent on multiple channels c. one signal is sent twice on the same channel d. a signal is sent over a wired network at the same time as the wireless network ____31. IEEE has divided the ____ layer into two sublayers Logical concern Control (LLC) and Media Access Control (MAC). a. Physical c. Transport b. Data Link d. Session ____32. The Physical Layer Convergence Procedure (PLCP) standards for 802. 11b are based on ____. a. DSSS c. OFDM b. FHSS d. PYS ____33. The 802. 1b standard specifies ____ frequencies that can be used, beginning at 2. 412 GHz. a. 4 c. 14 b. 10 d. 30 ____34. The ____ coding technique consists of a set of 64 8-bit code words. a. chipping c. Barker b. fixed scramble d. complementary code discerning ____35. The ____ field of an 802. 11a frame consis ts of 10 repetitions of a short training instalment signal and two repetitions of a long training sequence signal. a. Rate c. Synchronization b. Service d. Parity ____36. A BSS is ____. a. a group of wireless devices that is served by a superstar access point b. a unique identifier c. a geographical area where wireless devices reside d. two or more networks that are link uped through a common distribution system ____37. What is the minimum number of BSS networks required to form an ESS? a. 0 c. 2 b. 1 d. 10 ____38. All frames contain the MAC address of the source and destination device, a frame sequence number, and a frame ____ used for error detection. a. unit c. sum b. flag d. check sequence ____39. The ____ field appears first in a management frame. a. Frame control c. Destination address b. Duration d. BSSID ___40. When an AP accepts or rejects a wireless device it sends a(n) ____ frame. a. link request c. disassociation b. association response d. reas sociation ____41. In an infrastructure network the beacon interval is normally set to ____ ms, although it can be modified. a. 1 c. century b. 10 d. 1000 ____42. What is the default authentication method according to the 802. 11 standard? a. basic c. shared key b. open system d. private key ____43. What is the first step in shared key authentication? a. AP encrypts challenge text and sends it to wireless device b. wireless device encrypts challenge text and sends it to AP c. AP sends wireless device an authentication frame that contains a block of text known as the challenge text d. wireless device sends an authentication frame to the AP ____44. future(a) authentication, if the access point accepts the wireless device, it reserves memory space in the AP and establishes a(n) ____ ID for it. a. association c. member b. device d. authentication ____45. Why is CSMA/CD unsuitable for wireless networks? a. Hidden node problem c. difficult to synchronize backoff times b. difficult to detect collisions d. Both A and B ____46. The 802. 11 standard provides an option that can be used when collisions occur due to a hidden node. That option is known as ____. a. virtual node detection c. virtual carrier comprehend b. node collision protocol d. hidden node detection ____47. The RTS/CTS protocol is especially taxing when ____ data packets are being transmitted. a. short c. encrypted b. long d. redirecting ____48. ____ effectively prevents collisions because every device must wait until it receives permission before it can transmit. a. CSMA/CD c. Polling b. CSMA/CA d. Fragmentation ____49. The ____ draft defines a superset of features that is intended to provide QoS over WLANs. a. 802. 11a c. 802. 11e b. 802. 11b d. 802. 11g ____50. An access point sends out a beacon frame containing a ____ identifying the stations that have buffered frames waiting at the access point. a. buffer list c. waiting map b. traffic indication map d. buffered cache ____51. With MobileIP, the ____ assigns the mobile computer a refreshing (but temporary) IP number. a. local AP c. foreign agent b. foreign AP d. roamed network ____52.What do many industry experts believe is the greatest opportunity for business-process improvement at the beginning of the 21st century? a. access to the Internet from employees desks b. extending network access to employees who are away from their desks c. providing wireless hotspots in rural communities d. All of the above ____53. According to a study conducted by NOP WorldTechnology, wireless LANs enable users to be connected to network resources ____ additional hours per day. a. . 5 c. 1. 75 b. 1 d. 2. 5 ____54. Which organization would most likely not benefit from the introduction of a wireless LAN? . business that is rapidly losing market share and has changed CEOs three times in the last 18 months b. business that has captured a niche in the marketplace and underwayly has no serious compet itors c. organization that is fighting a fierce battle with its competitors d. they would all benefit ____55. According to NOP-World Technology, ____ percent of end users say that a WLAN improves their quality of life by increasing flexibility and productivity, and saving time. a. 30 c. 87 b. 56 d. 93 ____56. Intel recommends that once the ROI model is complete, large organizations should return to step ____. . 1 c. 3 b. 2 d. 4 ____57. A(n) ____ provides wireless LAN service, for free or for a fee, from a variety of public areas, including drinking chocolate shops, public libraries, and airport lounges. a. wireless gateway c. hotspot b. infrastructure network d. ad hoc network ____58. Only in areas where low bandwidth is acceptable or an ad hoc wireless network will be used should ____ networks be considered. a. 802. 11a c. 802. 11g b. 802. 11b d. 802. 11 pre-N ____59. What is a disadvantage of thin access points? a. complicated network management b. handoff t ime is increased c. very expensive . all thin access points and switches are proprietary ____60. ____ generates the highest level of interference. a. Marble c. Paper b. Bulletproof glass d. Metal ____61. In a 802. 11b network, how many power users should be associated with one access point? a. 5 c. 25 b. 15 d. 50 ____62. What should you do when electrical alternating current power is not available near the AP location? a. move it to another location c. use a battery b. use wireless power d. user Power over Ethernet ____63. ____ is one of the most effective strategies for providing support for a new wireless network. . Creating formal user support groups b. Assigning support to the information technology department c. Maintaining a help desk d. Outsourcing support to a third party ____64. In a site survey analyzer, vendors use an algorithm or a lookup table to convert ____ values to dBm, mW, or signal strength percentage. a. GHz c. RSSI b. MAC d. RFID ____65. Wh at is a drawback of a spectrum analyzer? a. information is displayed in graphical form and not as raw data b. information is displayed as raw data, not in graphical form c. information only applies to one frequency d. only made by a hotshot manufacturer and very expensive ____66. How are business requirements for a WLAN obtained? a. practice company documentation c. interviewing technical staff b. interviewing management d. Internet research ____67. What is the best way to gather site-specific documentation? a. reviewing blueprints c. inspecting the site b. interviewing management d. viewing documentation ____68. What is the first step in collecting RF information? a. position the access point c. document AP position b. note the objects and layout of the room d. walk just about room to test signal ___69. What should you be sure to do when collecting RF information? a. take pictures of your location as you move around b. connect to the Internet and download a file to test bandwidth c. write down your perception of connection speed d. observe the data being displayed by the bundle measurement tools ____70. What affects the coverage pattern? a. wireless protocol c. notebook operating system b. objects that interfere with the RF signal d. skill of person conducting site survey ____71. The term ____ describes the rate of transmission falling as the device moves farther from the AP. a. coverage pattern c. data rate boundaries b. packet throughput d. RF frequency ____72. What affects transmission ambit? a. distance only c. distance and objects in path b. objects in path only d. wireless protocol ____73. What provides the greatest source of RF interference? a. mirror c. desk b. interior wall d. chair ____74. What type of AP antenna is most commonly used in a site survey? a. omnidirectional c. highly-directional b. semi-directional d. parabolic ____75. The ____ setting of a site survey analyzer specifies the AP that will be in volved in the test. a. Destination MAC Address c. Packet Tx Type b. continual Link Test d. Delay Between Packets ____76. Why is it important to document existing wired and wireless networks? a. to examine possible sources of interference b. to ensure that the new or expanded wireless LAN will dovetail into what is already in place c. to avoid providing overlapping network coverage d. to better generalize the basic networking needs of the organization Matching Match each term with the correct statement below. a. physical layer f. direct sequence spread spectrum b. channel bonding g. quadrature phase shift keying c. frequency hopping spread spectrum h. transport layer d. Forward Error Correction i. orthogonal frequency division multiplexing e. network layer ____77. uses a range of frequencies that change during the transmission ____78. transmits a secondary copy along with the primary information ____79. sends signals to the network or receives signals from the networ k ____80. ensures that error-free data is presumption to the user ____81. sending multiple signals at the same time Match each term with the correct statement below. a. dynamic rate shifting f. frames b. digital certificate g. contention c. scanning h. roaming d. ad hoc mode i. polling e. reassociation ____82. segments in a packet ____83. any device can attempt to transmit a contentedness at any time ____84. as a mobile device moves farther away from the AP, the transmission speed decreases ____85. wireless devices communicate directly between themselves ____86. digital documents that associate an individual with a key value ____87. receiving wireless device looking for beacon frames Match each term with the correct statement below. a. ad hoc f. Point-to-multipoint remote wireless bridge b. plenum g. soft benefits c. current network table h. thin access point d. fat access point i. unverbalized benefits e. ROI ____88. standard measure of the profitability of a pro ject ____89. benefits that are difficult to quantify ____90. management functions of a WLAN such as user authentication, encryption, and access point configuration are included within the AP itself ____91. air handling space above drop ceilings ____92. benefits that can be easily measured or quantified ____93. used to connect multiple LAN segments Match each term with the correct statement below. a. coverage pattern f. network analyzer b. spectrum analyzer g. transmission range c. packet throughput h. unicast d. site survey analyzer i. data rate boundary e. multicast ____94. frame is sent from one sender to multiple recipients with a single transmit operation ____95. area in which the signal can be received from the AP ____96. frame is sent from one sender to a single receiver ____97. scans the radio frequency spectrum and provides a graphical display of the results ____98. measurement tool that is specifically designed for conducting a wireless LAN site survey ____99. rang e of coverage for a specific transmission speed ____100. number of packets sent and received and the data rates for each