Fog Computing: what it is and how it differs from Edge Computing


You have IoT-based systems with geographically dispersed end devices generating data in the order of terabytes, and where connectivity to the cloud is irregular or not feasible. The cloud server performs further analysis on the IoT data and data from other sources to gain actionable business insights. The clearest application of IoT technology and fog computing can be seen within vehicle fleets.

What is fog computing

Improved User Experience – Quick responses and no downtime make users satisfied. Unfortunately, nothing is spotless, and cloud technology has some drawbacks, especially for Internet of Things services. Plus, there’s no need to maintain local servers and worry about downtimes – the vendor supports everything for you, saving you money.

The main difference between cloud computing and fog computing is that the former provides centralized access to resources whereas the latter provides a decentralized local access. Fog computing is a medium weight and intermediate level of computing power. Rather than a substitute, fog computing often serves as a complement to cloud computing. The fog nodes are located closer to the data source and have higher processing and storage capabilities. Fog nodes can process the data far quicker than sending the request to the cloud for centralized processing. It could include fog computing gateways that accept data IoT devices have collected.

Application of Fog Computing

It will enable improved productivity and faster creation of applications. Tim has written extensively on net admin topics helping businesses and entrepreneurs to keep their data protected. This information is transformed into a format that internet-based service providers can understand, like MQTT or HTTP .

What is fog computing

High latency – More and more IoT apps require very low latency, but the Cloud cannot guarantee this due to the distance between client devices and data processing centers. We are already used to the technical term cloud, a network of multiple devices, computers, and servers connected to the Internet. The license fee and on-premises maintenance for cloud computing are lower than fog computing.

Clearing The Fog: What is Fog Computing in IoT?

It facilitates the operation of computing, storage, and networking services between end devices and computing data centers. Because sensors — such as those used to detect traffic — are often connected to cellular networks, cities sometimes deploy computing resources near the cell tower. These computing capabilities enable real-time analytics of traffic data, thereby enabling traffic signals to respond in real time to changing conditions. Helder Antunes, senior director of corporate strategic innovation at Cisco and a member of the OpenFog Consortium, says that edge computing is a component, or a subset of fog computing.

IoT devices are often resource-constrained and have limited computational abilities to perform cryptography computations. A fog node can provide security for IoT devices by performing these cryptographic computations instead. Fundamentally, the development of fog computing frameworks gives organizations more choices for processing data wherever it is most appropriate to do so.

Marshalling the power of up-to-data insights at the edge of a network is bound to have a positive impact on improving an enterprise’s decision making. Whether that means having a more-informed perspective of patient care or keeping fleet vehicles on the road. Healthcare has always had a chaotic relationship with disruptive technologies as there is very little time for a learning curve when dealing with patient care. However, the use of IoT technology has been somewhat of a sticking point for healthcare providers as traditional network models and cloud computing struggle to turn around data in a short time frame. This demonstrates that massive amounts of data analysis performed in real-time are vital to prevent accidents, and a fog computing strategy is crucial to maximizing the use of the available mobile bandwidth. These sophisticated utility systems frequently compile information from a large number of sensors or have to withstand remote installations.

Edge and Fog Computing Performance

In reality, any device with computing, storage, and network connectivity can act as a fog node. When data is collected by IoT devices and edge computing resources, it is sent to the local node instead of the cloud. Utilizing fog nodes closer to the data source has the advantage of faster data processing when compared to sending requests back to data centers for analysis and action. In a large, distributed network, fog nodes would be placed in several key areas so that crucial information can be accessed and analyzed locally. The group has identified numerous IoT use cases that require edge computing including smart buildings, drone-based delivery services, real-time subsurface imaging, traffic congestion management and video surveillance.

  • The main benefits of fog computing come down to increasing the efficiency of an organization’s computing resources and computing structure.
  • Fog computing eliminates the need to send data to the cloud to be processed.
  • Tim has written extensively on net admin topics helping businesses and entrepreneurs to keep their data protected.
  • Data storage is another important difference between cloud computing and fog computing.
  • Fog computing uses the concept of ‘fog nodes.’ These fog nodes are located closer to the data source and have higher processing and storage capabilities.

Assess the current IT infrastructure and workflow, and determine if there are activities best served by local, edge processing and storage. Pay close attention to connectivity, both among local devices operating over WiFi, Bluetooth, wired Ethernet and other short-range transports, and between the edge and the cloud. In the case of remote connectivity, wireless options like 4G or LoRa long range wireless may be the best options for linking to the cloud.

Difference Between Cloud and Fog Computing

Fog acts as an intermediary between data centers and hardware and is closer to the end-users. If there is no fog layer, the Cloud communicates directly with the equipment, taking time. Large amounts of data are transferred from hundreds or thousands of edge devices to the Cloud, requiring fog-scale processing and storage. There are many centralized data centers in the Cloud, making it difficult for users to access information on the networking area at their nearest source. Offloading occurs when volumes of data cannot be processed remotely in a timely and efficient manner. In these circumstances, the processing of endpoint data is moved to a local node, which preprocesses and filters data, serving some requests autonomously and referring to a cloud server.

What is fog computing

This stops anyone from attempting to tamper with fog nodes or accessing sensitive information . It has become apparent that modern networking needs to combine these two approaches if coverage is to be maximized. While a decentralized approach can’t make services and data available globally like centralized approaches can, it can martial those local resources that have proven slow under a centralized approach.

The lack of visibility of these systems due to their physical location can leave enterprises open to external threats. Physical location – Perhaps the most significant limitation of fog computing is that it is much more geographically restrictive than a cloud service. A cloud service can be accessed from anywhere whereas fog computing is used to interact with devices on a local level. Fog computing and cloud computing are primarily distinguished by their decentralization and flexibility. Fog computing, also known as fogging or fog networking, refers to a decentralized computer system that is situated between the cloud and data-producing devices.

Are fog computing and edge computing the same?

Where it originated, cloud computing, fog computing keeps some of its characteristics. Users can continue to use a fog computing paradigm while continuing to keep their apps and data in the cloud and pay for upgrades and maintenance of their data in the cloud in addition to offsite storage. For instance, their employees will still have remote access to the data. By adding more firewalls to the network, users may fog vs cloud computing increase security thanks to the fog computing paradigm’s ability to divide bandwidth traffic. In simple terms, fog computing is a distributed network fabric that stretches from the outer edges of data creation to the point of storage. In this layer, the various nodes are monitored which includes monitoring tasks performed by various nodes, the time at which the task is performed, and the next course of action.

The ideal place to analyze most IoT data is near the devices that produce and act on that data. Fog computing is a decentralized computing infrastructure in which data, compute, storage and applications are located somewhere between the data source and the cloud. Like edge computing, fog computing brings the advantages and power of the cloud closer to where data is created and acted upon.

Edge Computing vs. Fog Computing – The Difference Techfunnel – TechFunnel

Edge Computing vs. Fog Computing – The Difference Techfunnel.

Posted: Thu, 14 Apr 2022 07:00:00 GMT [source]

However, a good example to illustrate the importance of rapid data analysis is alarm status. Many security systems rely on IoT technology to detect break-ins, theft, etc., and notify the authorities. Fog computing encapsulates edge processing as well as the network connections required to bring that data from the edge to its endpoint. Fog networking supports the Internet of Things concept, in which most of the devices used by humans on a daily basis will be connected to each other. Examples include phones, wearable health monitoring devices, connected vehicle and augmented reality using devices such as the Google Glass.

Fog is processed and stored at the edge of the network closer to the source of information, which is important for real-time control. Another way to think about the difference between edge computing and fog computing is that fog is the standard that enables repeatable, structured, scalable performance within the edge computing framework. Edge computing is really a subtype of fog computing that means that data is generated, processed, and stored close together. Fog computing includes edge processing as well as the necessary infrastructure and network connections for transporting the data. Time-sensitive data like alarms, fault warnings, and device status greatly benefits from the speed of edge computing. This data needs to be analyzed and acted upon quickly in order to prevent major damage or loss.

Fog Computing – What is fog computing?

Some cities are considering how an autonomous vehicle might operate with the same computing resources used to control traffic lights. Such a vehicle might, for example, function as an edge device and use its own computing capabilities to relay real-time data to the system that ingests traffic data from other sources. The underlying computing platform can then use this data to operate traffic signals more effectively. Smart cities and smart grids Like connected cars, utility systems are increasingly using real-time data to more efficiently run systems.

In order to reduce processing time and distance, edge computing aims to bring data sources and devices closer together. The performance and speed of apps and devices should thus increase as a result. Fog computing is also vulnerable to cyberattacks since most of the devices connecting to the fog node are not authenticated. Large organizations utilize multiple devices, and it is a nearly impossible task to authenticate all of them. Plus, restricting access to the fog nodes detracts from the whole purpose of fog computing.

This will filter the data and in some cases save it to hand over to the cloud later. Businesses can only swiftly meet customer demand if they are aware of the resources that consumers require, where those resources are needed, and when those needs are. Developers may create fog apps quickly and deploy them as required thanks to fog computing. Circumstances can be tough since IoT devices are frequently used in emergency situations and challenging environmental conditions. Under these circumstances, fog computing can increase dependability while easing the load on data transmission.

Data is transformed before being delivered to an IoT gateway or fog node. These endpoints gather the data to be used for additional analysis or send the data sets to the cloud for wider distribution. Edge nodes are those nodes that are most near the edge and receive data from other edge devices like routers or modems. ‘Cloud computing’ is the practice of using a network of remote servers hosted on the Internet to store, manage, and process data, rather than a local server or a personal computer. This was because fog is referred to as clouds that are close to the ground in the same way fog computing was related to the nodes which are present near the nodes somewhere in between the host and the cloud.


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