A gateway is a network node or device that connects two networks that use different transmission protocols. Gateways play an important role in connecting two networks. It works as the entry-exit point for a network because all traffic that passes across the networks must pass through the gateway. In this article, we are going to discuss all important points related to Gateways.
What are Gateways?
A network gateway is a device that connects different networks by translating messages from one protocol into another protocol. The gateway monitors and controls all the incoming and outgoing network traffic. Gateways are also known as protocol converters because they play an important role in converting protocols supported by traffic on different networks. As a result, it allows smooth communication between two networks.
Features of Gateways
Gateways provide a wide variety of features. Some of these are:
- A gateway is situated at a network’s edge and manages all data that enters or exits the network.
- A gateway is distinct from other network devices in that it can operate at any layer of the OSI model.
- Gateways made the transmission more feasible as it queued up all the data and divided it into small packets of data rather than sending it bulk.
- Gateways provide security within the network.
Types of Gateways
These below are the types of Gateway on the basis of direction of flow of data:
- Unidirectional Gateways: Data can only pass through unidirectional gateways in one direction. The destination node replicates changes made in the source node but not the other way around. They are tools for archiving the packets.
- Bidirectional Gateway: Data can pass through bidirectional gateways in both directions. They are tools for synchronisation.
These below are the types of Gateway on the basis of functionality of Gateway:
- Network Gateway: The most popular kind of gateway, known as a network gateway acts as an interface between two disparate networks using distinct protocols. Anytime the word gateway is used without a type designation, it refers to a network gateway.
- Cloud Storage Gateway: A network node or server known as a cloud storage gateway translates storage requests made using various cloud storage service API calls, such as SOAP (Simple Object Access Protocol) or REST (Representational State Transfer). Data communication is made simpler since it makes it easier to integrate private cloud storage into applications without first moving those programmes to a public cloud.
- Internet-To-Orbit Gateway (I2O): Project HERMES and Global Educational Network for Satellite Operations (GENSO) are two well-known I2O gateways that connect devices on the Internet to satellites and spacecraft orbiting the earth.
- IoT Gateway: Before delivering sensor data to the cloud network, IoT gateways assimilate it from Internet of Things (IoT) devices in the field and translate between sensor protocols. They link user applications, cloud networks, and IoT devices.
- VoIP Trunk Gateway: By using a VoIP (voice over Internet Protocol) network, it makes data transmission between POTS (plain old telephone service) devices like landlines and fax machines easier.
How Gateways Work?
- The gateway receives data from devices within the network.
- After receiving data the gateway intercept and analyze data packets, which include analyzing packet header, payload etc.
- Based on the analysis of the data packets, the gateway calculate an appropriate destination address of data packet. It then routes the data packets to their destination address.
- In some cases, the gateway might also want to transform the format of the obtained data to ensure compatibility at the receiver.
- Once the data packets have been analyzed, routed, and converted, then the gateway sends the last packets to their respective destinations address inside the network.
Gateways
Advantages of Gateways
- Gateway helps in connecting two different network.
- Gateway is used to filters and does not allow anything that can harm to the network.
- Gateway is worked as the protocol converter.
- Gateway is the highly secure device that provides security from external attacks.
Limitations of Gateways
There are few limitations of gateways as well. Here are some of them:
- Gateway causes time delay since the conversion of data according to the network requires time.
- Failure of the gateway might lead to the failure of connection with other networks.
- The implementation of Gateway is very complex and it is not cost efficient.
- Gateway is hard to manage
Conclusion
In conclusion gateway plays an important role for managing the flow od data between various networking device. It works as the entry-exit point for a network because all traffic that passes across the networks must pass through the gateway.
Frequently Asked Question on Gateways – FAQs
How is a gateway different from router?
A router normally sends data within a network, whereas a gateway links networks. Routers and gateways have traditionally been independent hardware components. However, it’s more typical now to combine their activities under the umbrella term “router.” For Example, Wi-Fi routers are frequently provided internet service for both house and business.
What is a bad gateway error?
A bad gateway error message like 502 Bad Gateway, shows something is not right with a website’s server communication. You can refresh the web browser, open a new browser session, or remove your browser’s cache to fix the error.
What is a default gateway?
We can say a hardware point is a default gateway which provides access to communicate one device network with another devices network for.