adept technology GRouter3, Руководство пользователя

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Fig.1.1: Network Layers
A network connector is a device that joins different parts of a network. Connectors have a specific
name that is dependent on the layer at which the connector operates. For example a router
operates at the network layer and a gateway at the application layer. Because higher layers of the
protocol do not have access to some of the information stripped away by lower layers, network
connectors operating at different layers have different capabilities. ere is also some abuse of
terminology so that the descriptions of network connectors from different manufacturers may be
confusing. For example, a repeating router may be called a repeater for short. Although a
repeating router acts similarly to a physical layer repeater, it operates at the network layer and is
not equivalent. It is usually best to find out at which layer a network connector operates.
Fig.1.2: Network Connector Types and Associated Layers
e GR3 router is a more complex connector because is connects two different protocols and also
connects the protocols at different layers. On the IP side the GR3 router operates at the
application layer and so is appropriately called an IP Gateway. On the 709.1 side the GR3 router
operates at the network layer and is appropriately called a 709.1 router. So depending on the user’s
perspective the GRouter3 (GR3) could be called a gateway or router or a router/gateway. (See
Figure 2.3)
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