SWITCHING EXAM CERTIFICATION GUIDE

receive chains and two data streams is called a 2×2.This is important because the Cisco 1250 AP is a 2×3 device. If you have a laptop that is a2×2, you can start to see how this takes on meaning. When using special multiplexing,you are limited to the same number of streams as the lowest number of an[r]

12 CCNA Wireless Official Exam Certification Guide5 GHzThe 5-GHz range is used by the 802.11a standard and the new 802.11n draft standard. Inthe 802.11a standard, data rates can range from 6 Mbps to 54 Mbps. 802.11a devices werenot seen in the market until 2001, so they do not h[r]

directions. This can be caused by some object that has reflective, yet jagged edges, suchas dust particles in the air and water. One way to illustrate the effects would be to considershining a light onto a pile of broken glass. The light that is reflected shoots off in manydifferent directions. The[r]

The Wi-Fi Alliance was formed in 1999 and currently has more than 300 members in morethan 20 countries. What makes this organization different from the ETSI, FCC, and IEEEis that it gives its seal of approval to devices that plan in interoperability. The next timeyou’re at the electronics shop, flip[r]

As you place more information on a signal, you use more frequency spectrum, or band-width. You may be familiar with using terms like bits, kilobits, megabits, and gigabitswhen you refer to bandwidth. In wireless networking, the word bandwidth can mean twodifferent things. In one sense of the word, i[r]

Height with No Obstructions17365681111146Total DistanceFresnel @ 60%Earth CurvatureAntennaHeightFigure 3-10 Sample Bridge Calculatorof 0 to 60. The scale is usually represented in dBm, so the two scales would not match up.It is also up to the vendor to determine what dBm is represented by 0 and what[r]

ondary purpose is to provide the information necessary to deploy a CUWN and a CiscoMobility Express (CME) network as part of the Smart Business Communications System(SBCS). The new Cisco exam approach provides an avenue to write the book with both areal-world and certification-study ap[r]

Foundation Topics 192Understanding the Different LWAPP Modes 192LWAPP Layer 2 Transport Mode 193LWAPP Layer 3 Transport Mode 194How an LWAPP AP Discovers a Controller 196How an LWAPP AP Chooses a Controller and Joins It 197How an LWAPP AP Receives Its Configuration 200Redundancy for APs and Controll[r]

Part IV Final Preparation 428Chapter 21 Final Preparation 431Part V Appendixes 436Appendix A Answers to the “Do I Know This Already?” Quizzes 438Appendix B Memory Tables (on the CD only)Appendix C Memory Tables Answer Key (on the CD only)Glossary 450Index 464vi CCNA Wireless Official Exam [r]

xx CCNA Wireless Official Exam Certification Guide00_1587202115_fm.qxd 9/29/08 2:42 PM Page xxIntroductionWelcome to the world of Cisco Certified Network Associate (CCNA) Wireless! As tech-nology continues to evolve, wireless technologies are finding their way to the forefront.T[r]

82 CCNA Wireless Official Exam Certification Guide13.5 Yagi AntennaThe 13.5 yagi antenna is a directional antenna that offers a very direct radiation pattern.Sometimes you see these mounted above doorways to cover a long hallway. You can alsoput a number of them side by side on[r]

25. A device that has two transmit antennas and two receive antennas is referred to aswhich of the following?a. Dual TxRxb. 2X2c. 2xd. A double07_1587202115_ch06.qxd 9/29/08 2:44 PM Page 99100 CCNA Wireless Official Exam Certification GuideFoundation TopicsThe 802.11 Protocol Family Ov[r]

Topic06_1587202115_ch05.qxp 9/29/08 2:45 PM Page 7980 CCNA Wireless Official Exam Certification GuideFigure 5-12 AIR-ANT24120Figure 5-13 AIR-ANT2485P-R Wall-Mounted Patch AntennaFigure 5-14 Radiation Pattern of the AIR-ANT2485P-R06_1587202115_ch05.qxp 9/29/08 2:45 PM Page 80Chapter 5:[r]

52 CCNA Wireless Official Exam Certification GuideFoundation TopicsGeneral Wireless TopologiesWhen you’re talking about wireless topologies, there are a number of ways it could go. Ifyou are talking about how your wireless network looks next to your wired network, youare most likely ta[r]

b. Indoor directionalc. Outdoor point-to-pointd. Outdoor omnidirectional12. Which antenna is considered a “special” omnidirectional antenna?a. AIR-ANT1728b. AIR-ANT3338c. AIR-ANT2485P-Rd. AIR-ANT321313. A yagi antenna is best used in what setting or settings? (Choose all that apply.)a. Warehouse whe[r]

wireless metropolitan-area network (WMAN) A wireless network that encompasses ametropolitan area.wireless personal-area network (WPAN) A wireless network covering a very small area.462 CCNA Wireless Official Exam Certification Guide28_1587202115_glossary.qxd 9/29/08 2:44 PM Page[r]

22_1587202115_ch19.qxp 9/29/08 2:46 PM Page 395396 CCNA Wireless Official Exam Certification GuideExample 19-1 show running-config Command Output(Cisco Controller) > show running-config802.11a 11nSupport a-mpdu tx priority 0 disable802.11a cac voice tspec-inactivity-timeout igno[r]

is a minor alarm.By clicking an alarm, you can get more details on the situation.Another valuable resource in the WCS is the capability to troubleshoot clients. SelectMonitor > Clients. Next, place a Client MAC address into the Client MacAddress fieldand click the Troubleshoot button, as show[r]

Telnet uses TCP for connectivity (transport layer). The TCP segment gets placed into an IP packet (network layer) with a destination IP address of Host 2. The IP packet gets placed into an Ethernet frame (data-link layer), which is converted into bits, and sent onto the wire (phys-ical layer).CCIE.b[r]

About the Contributing Author Roy Spencer is a Cisco Certified Network Associate for WAN switching and a Certified Cisco Systems Instructor with over fifteen years experience in the education segment of the networking industry. He has worked as a course developer for Cisco Systems, Inc., 3Com C[r]