Difficulty: Easy
Correct Answer: Gateway
Explanation:
Introduction / Context:
Mixed environments may include LANs with different media access methods and frame formats (e.g., Ethernet vs. Token Ring). To share resources across these systems, you may need a device that can translate or interoperate across different protocols/architectures—not merely forward frames unchanged.
Given Data / Assumptions:
Concept / Approach:
A gateway performs protocol conversion and higher-layer mediation so endpoints on different LAN architectures can interoperate. In contrast, a bridge forwards frames within the same Layer 2 protocol family; a router forwards at Layer 3 but does not translate between incompatible Layer 2 protocols by itself; a repeater operates at Layer 1 and cannot resolve protocol differences. Therefore, the correct choice for “dissimilar LANs using different protocols” is a gateway.
Step-by-Step Solution:
Verification / Alternative check:
Historical solutions included multi-protocol gateways and application gateways to integrate Ethernet and Token Ring segments for file/print services.
Why Other Options Are Wrong:
Common Pitfalls:
Assuming routers solve all interconnection problems; routers do not convert frame formats or application protocols.
Final Answer:
Gateway.
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