Gateway
Although some textbooks use the terms gateway and router interchangeably, most of the literature distinguishes between the two. A gateway is normally a computer that operates in all five layers of the internet or seven layers of OSI model. A gateway takes an application message, reads it, and interpret it. This means that it can be used as a connecting device between two interworks that use different models. For example, a network designed to use the OSI model can be connected to another network using the Internet model. The gateway connecting the two systems can take a frame as it arrives from the first system, move it up to the OSI application layer, and remove the message.
GatewayAlthough some textbooks use the terms gateway and router interchangeably, most of the literature distinguishes between the two. A gateway is normally a computer that operates in all five layers of the internet or seven layers of OSI model. A gateway takes an application message, reads it, and interpret it. This means that it can be used as a connecting device between two interworks that use different models. For example, a network designed to use the OSI model can be connected to another network using the Internet model. The gateway connecting the two systems can take a frame as it arrives from the first system, move it up to the OSI application layer, and remove the message.
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