CWNA Chapter 13 – 802.11 Network Security Architecture

My Notes from chapter 13 of the CWNA study guide 802.11 security basics Data privacy and integrity All data transmissions travel in the open air. Protecting data privacy in a wired network is much easier because physical access to the wired medium is more restricted, whereas access to wireless transmissions is available to anyone in …

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CWNA Chapter 12 – WLAN Troubleshooting and Design

My Notes from chapter 12 of the CWNA study guide Layer 2 retransmissions The mortal enemy of WLAN performance is layer 2 retransmissions that occur at the MAC sublayer If a collision occurs or any portion of a unicast frame is corrupted, the cyclic redundancy check (CRC) will fail and the receiving 802.11 radio will …

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CWNA Chapter 11 – WLAN Deployment and Vertical Markets

My Notes from chapter 11 of the CWNA study guide Deployment considerations for commonly supported WLAN applications and devices Data Data Email and web browsing are two of the most common applications One of the most important aspects of designing a network to handle data-oriented applications is to ensure that the network design is capable …

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CWNA Chapter 10 – WLAN Architecture

My Notes from chapter 10 of the CWNA study guide Wireless LAN client devices 802.11 Radio form factors 802.11 radios are used in both client NICs and access points. External Radios Many form factors, meaning the NIC comes in different shapes and sizes: PCMCIA adapter/PC card Express Card USB Internal Radios Installed inside the device …

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CWNA Chapter 8 – 802.11 Medium Access

My Notes from chapter 8 of the CWNA study guide Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) vs. Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Set of rules to provide controlled and efficient access to the network medium. CSMA/CD is well known and is used by Ethernet networks CSMA/CA is not as well …

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CWNA Chapter 7 – Wireless LAN Topologies

My Notes from chapter 7 of the CWNA study guide Wireless networking topologies Wireless wide area network (WWAN) Provides RF coverage over a vast geographical area Typically use cellular telephone technologies or proprietary licensed wireless bridging technologies Some examples of these cellular technologies are general packet radio service (GPRS), code division multiple access (CDMA), time …

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