Gateway operates at all 7 layers of the OSI model. It is a device, which connects two different dissimilar n/w which have the same function of communication. The situation where gateways are necessary for different n/w like Ethernet, Token Ring, FDDI, etc. It can communicate if they are using the same protocol for communication like TCP/IP 08 Apple talk if they are using different protocols from gateway cash forward packets across different n/w s that may also use different protocols. Eg: if n/w A is a Token Ring network using TCP/IP & network B is a Novell Network, a gateway can relay frames between the two. This means that a gateway has not only had but also between different protocols. In certain situations, the only changes required are to the frame header. In other cases, the gateway must take the case of different frame sizes, data rates, formats, acknowledgment schemes, priority schemes, etc.
Features of Gateways
Gateway is located at the boundary of a network and manages all data that inflows or outflows from that network.
It forms a passage between two different networks operating with different transmission protocols.
A gateway operates as a protocol converter, providing compatibility between the different protocols used in the two different networks.
The feature that differentiates a gateway from other network devices is that it can operate at any layer of the OSI model.
It also stores information about the routing paths of the communicating networks.
When used in enterprise scenario, a gateway node may be supplemented as proxy server or firewall.
Gateway operates at all 7 layers of the OSI model. It is a device, which connects two different dissimilar n/w which have the same function of communication. The situation where gateways are necessary for different n/w like Ethernet, Token Ring, FDDI, etc. It can communicate if they are using the same protocol for communication like TCP/IP 08 Apple talk if they are using different protocols from gateway cash forward packets across different n/w s that may also use different protocols. Eg: if n/w A is a Token Ring network using TCP/IP & network B is a Novell Network, a gateway can relay frames between the two. This means that a gateway has not only had but also between different protocols. In certain situations, the only changes required are to the frame header. In other cases, the gateway must take the case of different frame sizes, data rates, formats, acknowledgment schemes, priority schemes, etc.
Features of Gateways