• Wireless Network

    Using Directional and Omni-Directional Antennas in Wireless Networks

    This post gives an introduction to the two types of Antennas used in Wireless Networks - Directional Antennas and Omni-directional Antennas. We also have a look at in-built antennas and external antennas and the options available with Access Points for the same. We discuss the type of coverage provided by either and particular situations where their usage is recommended.

  • Wireless Network

    Managing multi-vendor wireless access points in Wi-Fi networks

    This article gives an introduction to the software applications that manage multi-vendor access points, controllers and other Wi-Fi devices on a huge disparate network. We look at the user, device monitoring, visual heat maps offering live coverage of the Wi-Fi network, security features like rogue access point detection etc. that can be uniformly applied to a large network of multi-vendor access points.

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  • Wireless Network

    Guest Access in Wireless LAN

    This article explores the ways in which the guests can be given access to wireless networks, whether they could be authenticated, whether their access can be restricted to certain services in the network and whether usage statistics and logs can be generated for guests.

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  • Protocols

    Quality of Service in Wireless Networks – WMM and WMM-SA

    This article introduces the QoS mechanisms followed by a wireless network like WMM(Wireless Multi-Media) and WMM-SA(Wireless Multi-Media Scheduled Access) which are both standards based and help wireless networks to reliably enable real time and latency sensitive applications like voice and video by prioritizing them and transmitting them ahead of the normal data traffic like email, etc. Wireless Multi-Media (WMM): This is an IEEE standard (Subset of IEEE 802.11e) for QoS – Quality of Service in wireless networks. So, why is it so important, you may ask. It is, because it enables real time applications like voice and video on the wireless network by prioritizing those packets at the client level,…

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  • Protocols

    What is IEEE 802.11n, what are the advantages and challenges for 802.11n in Wi-Fi networks

    This article explains the IEEE 802.11n standard for wireless (Wi-Fi) networks, what is the bandwidth supported by this standard, what is the distance covered by access points employing 802.11n, the advantages of 802.11n, what are the challenges faced by this standard, what steps must someone ensure before upgrading to 802.11n and if it is backward compatible with other earlier standards.

  • Wireless Network

    Security threats in a Wi-Fi Network

    This article attempts to understand what kind of threats a Wi-Fi network could face, especially given the fact that even a person going on a road nearby could reach the enterprise Wi-Fi singals. We look at the vulnerabilities of WEP network, Network sniffers, SSID broadcasting, DOS attacks, De-Auth attacks, Mac-address spoofing, Man-in-the-middle attacks, honey pot attacks, rogue access points and the threat faced by them, Patches in your PC not being up to date, ad-hoc networks, Special Wi-Fi devices like Wireless cameras and wireless phones, loopholes in the authentication protocols, hackers who escape counter scanning by wireless IDS devices.

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  • Wireless Network

    Wireless Mesh Networks

    This article is about Wireless Mesh networks - how they eliminate the wires that connect to the wireless access point, applications of a mesh network, how mesh networks are formed and managed, what is mesh clustering and what are the advantages, what are the dis-advantages of a mesh network and of course, why mesh networks are exciting.

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