Where wireless is a passion
The OSI model is must-know knowledge for everybody that even thinks about toughing the network. Wireless acts at Layer 1 and Layer 2. In this blog, I want to look into the PHY layer (Layer 1), but first an overview. Layer 7 – Application Layer 6 – Presentation Layer 5 – Session Layer 4 – …
There are a several Wireless LAN architectures. For indoor networks, you have the Single MAC model and the Split MAC model. Single MAC model The logic for processing the MAC layer operation is within the access point. We call this a smart access point. Those access points are autonomous/standalone access points and are managed individually. …
Wireless is a shared medium so all clients and access points need to wait on each other before they can transmit data. This is to avoid collisions. Wireless uses Carrier Sense Multiple Access / Collision Avoidance. As we know, 802.3 uses CSMA/Collision Detection. You can compare wireless with a phone call—it is a shared medium …
I am not yet studying for CWSP, but for CWAP, it is necessary to understand the frames when a client connects to an access point. If something goes wrong in the authentication/association you need to understand how to troubleshoot. Before starting with my study notes for CWSP, this is a quick overview of what is …
Before you start with analyzing a problem, you need to know what kind of problems occur. Identifying the problem is the first step. In this step, it is important that you do not make any assumptions. Ask questions to the person who mentioned the problem. Is this person the only person that has this problem, …
Point to Point connections are interesting in the wireless LAN. Point to Point connections are mostly connections between two buildings. This blog is not about the theory of the Fresnel Zone and the Line of Sight, but I am kind of pretty proud of myself for this image that I created in Microsoft Paint. Keep …