Which network device is used to connect two computer networks that use different protocols?

The correct answer is Gateway.

Key Points

• A gateway is a network device that connects two networks with different protocols.
• It acts as a translator, enabling communication between networks that use different communication protocols.
• Gateways are crucial for communication between different network architectures (e.g., between a local area network (LAN) and the internet).
• They operate at any network layer, usually focusing on the application layer for protocol translation.

Additional Information

• Router: A router is a networking device that forwards data packets between computer networks. It is used for connecting networks that use the same protocol. It operates at the network layer (Layer 3) of the OSI model.
• Bridge: A bridge is used to connect two or more local area networks (LANs) that use the same protocol. It works at the data link layer (Layer 2) of the OSI model and is primarily used for segmenting networks to reduce traffic.
• None of the above: This option is incorrect because the correct device for connecting networks with different protocols is a gateway.
• Important Note: While gateways are versatile and powerful, they are more resource-intensive compared to other networking devices like routers and bridges due to their protocol translation functionality.