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Fog Computing?

by Evalyne Ndanu
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Definition

Fog computing is an Architecture that extends the services offered by the cloud to edge devices. It is an extension of cloud. Fog computing differs from cloud-computing because it decentralizes the cloud itself.

Edge devices include Routers, Switches, LAN & WAN devices . They are Entry points into your network.

In very simple terms Fog is Cloud Computing plus IoT (Internet of Things)

Overview.

The word Fog computing is believed to have originated from a technology company by the name ‘Cisco’. Its purpose is to allow data to be processed locally, leading to the reduction of the back-haul that takes the data to the internet.
Fog computing pushes intelligence down to the local area network (LAN) level of network architecture, processing data in a fog node or IoT gateway.

Cloud,fog and Edge

Cloud,fog and Edge

Advantages of Fog Computing.

  • Fog doesn’t work on a cloud, instead it works on an Network Edge so it is faster.
  • It has less demand for Bandwidth.
  • Adds security to the cloud.
  • Minimal amount of data is sent to the Cloud.
  • Reduced Latency.
  • Improved efficiency in data traffic.
  • Since the distance to be traveled by the data is reduced, it results in saving network bandwidth.
  • With data storage and processing taking place in LAN in this architecture, it enables organizations to, “aggregate data from multi-devices into regional stores.”
  • Fog nodes can withstand harsh environmental conditions.

Disadvantages of Fog Computing.

  • It is complex. Mostly because of the nodes involved.
  • Power consumption increases when another layer is placed between the host and the cloud.
  • High need for maintenance.
  • Trust and authentication are major concerns.

Fog Computing Examples

Smart transportation networks.

Connected manufacturing devices with cameras and sensors.

Jet engine that produce a large amount of data about the engine’s performance and condition very quickly.

Industrial gateways which collect data from edge devices, which is then sent to the LAN for processing.

 

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