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 …
Continue reading CWNA Chapter 13 – 802.11 Network Security Architecture
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 …
Continue reading CWNA Chapter 12 – WLAN Troubleshooting and Design
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 …
Continue reading CWNA Chapter 11 – WLAN Deployment and Vertical Markets
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 …
My Notes from chapter 9 of the CWNA study guide Packets, frames, and bits Same as OSI Model data traverses through each layer to be transmitted to the receiver and then back up the layers Data-Link layer Layer 2 of the OSI Model Divided into two sublayers: MAC Service Data Unit (MSDU) When the Network …
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 …
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 …
My Notes from chapter 6 of the CWNA study guide Industrial, Scientific, and Medical bands (ISM) ISM bands are defined by the ITU Telecommunication Standardization Sector (ITU-T) All three of these bands are license-free bands, and there are no restrictions on what types of equipment can be used in any of them. The frequency ranges …
Continue reading CWNA Chapter 6 – Wireless Networks and Spread Spectrum Technologies
I have had the privilege of Beta Testing the new CMX High Availability version this post is to run through how it was setup and different options of how to set up the HA. I will after testing post detailing my findings around how well the HA handles different situations. For this testing I have …
It's not all about Wi-Fi anymore
Networking With A Side of Snark
One radio guy's journey into an IP world. These are my musings alone and don't represent my employer.
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Experiences of a Connectivity Engineer
the world where wires fail to exist
My journey through the world of Wi-Fi...
A blog about wireless networking from Jim Vajda, CWNE #183
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Not Another Wireless Blog
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Sam's WiFi space - CWNE #101 - CCIE #40629 (Wireless)
Not Another Wireless Blog
Not Another Wireless Blog
THE WLAN 