Radio Frequency Engineering: Wireless LAN

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802.11 Network Implementation

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21% question associated with the Almost 802.11 Network Implementation 802.11 Protocols and devices include the flowing:

4.1 802.11 Network Design, Implementation, and Management

6.1.1 Identify technology roles for which wireless LAN technology is appropriate

o Corporate data access and end user mobility

o Network extension to remote areas

o Building to building connectivity-Bridging

o Last-mile data delivery – Wireless ISP

o Small Office/ Home Office (SOHO) use

o Mobile office networking

o Educational / class room use

o Industrial –warehousing and manufacturing

o Healthcare – Hospital and Offices

o Hotspots – Public network Access

4.2 802.11 Network Troubleshooting

6.2.1 Identify and explain how to solve the flowing wireless LAN implementation challenges

o Multipath

o Hidden Nodes

o Near/Far

o Narrowband and wideband RF Interference

o System Throughput

o Co-channel and Adjacent-channel Interference

802.11 Protocol Architecture
Almost 14% question associated with the 802.11 Protocols and devices. 802.11 Protocols and devices include the flowing:
Summarize the processes involved in authentication and association

• The 802.11 State Machine.
• Open System and Shared Key Authentication.
• Association, Reassociation, and Disassociation.
• Deauthintication.
• Shared Keys.
• Certificates and PACs.
3.1.2 Define, describe, and apply the following concepts associated wireless LAN service sets
• BSS & BSSID.
• ESS & ESSID/SSID.
• IBSS.
• Roaming.
• Infrastructure Mode.
• Ad Hoc Mode.
3.1.3 Explain and apply the flowing power management feature of wireless LANs
• PSP Mode
• CAM Mode
• TIM/DTIM/ATIM
3.2. 802.11 MAC & PHY Layer Technologies
3.2.1. Describe and apply the flowing concepts surrounding wireless LAN frames
• 802.11 Frame Format vs. 802.3 Frame Format
• Layer-3 Protocol Support by 802.11 Frames
3.2.2 Identify methods describes in the 802.11 standard for locating and maintaining connectivity with an 802.11 Wireless LAN
• Active Scanning(Probes)
• Passive Scanning(Beacons)
• Dynamic Rate Selection
3.2.3 Define, describe and apply 802.11 modes and features available for moving data traffic across the RF medium
• DCF
• CSMA/CA vs. CSMA/CD protocols
• RTS/CTS and CTS-to-Self protocols
• Fragmentation
• Wireless Multimedia (WMM) certification
3.3 Wireless LAN Infrastructure and Client Devices
3.3.1 Identify the purpose of the following wireless LAN infrastructure devices and describe how to install, configure, secure, and manage them
• Access Point
• Wireless LAN Bridges
• Wireless LAN Switches
• PoE Injectors and PoE-enabled Switches
• Residential Wireless Gateways
• Enterprise Wireless Gateways
• Enterprise Encryption Gateways
• Wireless LAN Routes
• Remote Office Wireless Switches
• Wireless LAN Mesh Routers

3.3.2 Describe the purpose of the following wireless LAN client devices and explain how to install, configure, secure, and manage them
• PCMCIA Cards
• USB, CB and SD Devices.
• Serial and Ethernet Converters
• PCI and Mini-PCI Cards
• Card Adapters
• Wireless workgroup Bridges

CWNA EXAM OBJECTIVES

CompTIA Breakaway 2011 - Photo

The CWNA certification exam covering the CWNA objectives will certify that successful candidates know the fundamentals of RF behavior, can describe the features and functions of the wireless LAN components, and have the skills needed to install, configure, and troubleshoot wirelees LAN hardware pheripherals and protocols. A typical candidate should have the CompTIA+ Network certification or equivalent knowledge, althrough Network+ certification is not required.

The skills and knowledge measured by this examination are derived from a survey of wireless networking exparts and professionals. The results of this survey were used in weighting the subject areas and ensuring that the weighting is representative of the relative importance of the content.

This section gives you idea about the CWNA exam objectives to sit in exam. The objectives are changes time to time so you should have to be connected with http://cwnabook.blogspot.com. Thanks for to keep in touch.

Certified Wireless Network Administrator(CWNA)

Becoming a Certified Wireless Network Administrator (CWNA) is a significant step in the right direction toward attaining wireless local area network (WLAN) expert status. Flowing the Certified Wireless Network Administrator (CWNA), the next steps are Certified Wireless Security Professional (CWSP), CWAP (Analysis), and eventually the Certified Wireless Network Expert.To reach this goals, you will need dedication, commitment, intelligence, and persistence.You will want to continue learning about the wireless industry as well. Protocols and standards will emerge and envolve; new wireless solutions will create contention and confusion.You will need to understand how they impact the wireless solutions you are proposing or have implemented. At some point, you will need to figure out if they are viable solution and consider if it is important to become an expert in them as well.

Radio Frequency Engineering

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