Category Archives: Networking


      Comments Off on Firewalls

Firewalls are the primary defense mechanisms against network security threats. A firewall is a system that can be positioned between any two networks to control the passage of data traffic in and out of these networks. Typically, the two networks are the internal, trusted, network and the Internet [1]. Firewalls… Read more »

Wireless will become the primary LAN technology

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The mainstream consumer market started seeing Wi-Fi products based on IEEE 802.11ac standard in 2013. The standard is the fifth generation of Wi-Fi networking technology that promises more bandwidth to users at home and the office. The new Wi-Fi brings new improvements to wireless networks including offering 1.3Gbps of bandwidth… Read more »

For safety’s sake let cars talk

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Earlier this year, the U.S. National Highway Traffic Safety Administration announced it would begin working on enabling vehicle-to-vehicle (V2V) communication technology for light vehicles [1]. This step is part of the agency’s effort to improve transportation safety and it is a signal to the transportation-related industries to begin the deployment… Read more »

Graph Layout – Part 1

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Many applications, especially those that require visualizing complex information, rely on manipulating and presenting data as graphs composed of nodes and links. A graph, in the mathematical context, is a set of objects represented as vertices, or nodes, and a set of links connecting some pairs of objects. The graph… Read more »

Graph Animation

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This is another example of using Processing to create animations. The GraphAnimation program demonstrates packet forwarding by flooding. A packet sent by node A is replicated by every node (router) it reaches and sent in all connected links until it reaches the destination node N. Knowing the shortest route, node… Read more »

Network Availability: the quest for the five nines

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Any organization that relies on data networks for its core operations needs to ensure the continued availability of its network infrastructure, which includes LAN devices (switches, routers, firewalls, etc.), WAN links, Internet and cloud connections, and the support facilities (power, air conditioning, etc.). The network operator may achieve the desired… Read more »

Vehicles communication and the mysterious traffic jams

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Have you been stuck in traffic driving a car at the speed of a few meters per hour only to emerge from the traffic jam a while later not certain what caused it in the first place? Traffic experts are likely to attribute the cause to a road construction, a… Read more »

Connectivity with Dark Fibre and Carrier Ethernet Services

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Network service providers (a.k.a communication carriers) are offering multiple services suitable for MAN (metropolitan area network) and WAN (wide area network) connectivity. This article introduces two of these services that offer unique benefits to organizations seeking this type of network connectivity. Dark Fibre Service Dark fibre refers to optical fibre… Read more »

What is SDN?

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Software Defined Networks (SDN) is a new technology with a lot of potential and a healthy dose of hype. The main premise of SDN is moving the intelligence of the network from distributed network nodes to a centralized location to enable programmability and flexibility of configuration through software applications. Each… Read more »

Multi-homed Internet Connectivity using BGP

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Connectivity to the Internet through more than one upstream ISP (Internet Service Provider) is referred to as multi-homing (or dual-homing in case of two ISPs). Multi-homing is generally required to increase the reliability of the Internet connection by reducing the reliance on a single provider and eliminating single-point-of –failure in… Read more »