Q.What is the primary function of a gateway in a computer network ? Explain briefly.
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Start your 14-day free trial to unlock the full solution →A gateway acts as a translator and entry-exit point between networks that use different protocols, enabling communication across incompatible systems.
When you think about computer networks, imagine different neighborhoods where people speak different languages and follow different customs. A gateway is the interpreter stationed at the border who makes communication possible between these distinct communities.
The primary function of a gateway is protocol conversion. Networks don't all speak the same language—some might use one set of rules (protocols) for packaging and sending data, while others use completely different standards. A gateway sits at the boundary between two such networks and translates data from one protocol format to another, making seamless communication possible.
Consider a practical scenario: your office network might use TCP/IP protocols, but it needs to communicate with a legacy mainframe system that uses an entirely different protocol suite. The gateway receives data packets from one network, strips away the original protocol information, repackages the actual data according to the destination network's protocol requirements, and forwards it along. When responses come back, it performs the reverse translation.
Gateways operate at multiple layers of the network model simultaneously—often at the application layer—because they need to understand and convert the actual content and structure of the data, not just route it based on addresses. …
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