The primary function of a Gateway in a computer network is to connect different networks operating with different protocols. It acts as an intermediary device that enables communication between networks that use different protocols, allowing them to exchange information and share resources.

1. Connecting Networks with Different Protocols:
A gateway serves as a bridge between networks that use different communication protocols. Each network may have its own set of rules and standards for transmitting and receiving data. The gateway translates the data from one protocol to another, making it compatible for transmission across different networks.

2. Protocol Conversion:
One of the key functions of a gateway is to manage protocol conversion. It understands the protocols used by each network and converts the data packets between them. For example, if one network uses the Internet Protocol (IP) and another uses the Transmission Control Protocol (TCP), the gateway will convert the data packets from IP to TCP or vice versa, ensuring seamless communication between the networks.

3. Data Routing:
In addition to protocol conversion, a gateway also routes data packets based on IP addresses. It examines the destination IP address of each packet and determines the appropriate network to forward it to. This routing decision is based on predefined rules and routing tables within the gateway.

4. Network Management:
Gateways also play a crucial role in managing the overall network architecture. They can enforce security policies, manage network traffic, and control access to resources. Gateways act as a point of control and can implement various security measures to protect the network from unauthorized access or potential threats.

5. Interconnecting Different Network Types:
Gateways are capable of connecting networks of different types, such as LANs (Local Area Networks), WANs (Wide Area Networks), and the Internet. They facilitate communication between these networks by translating the data and ensuring its successful transmission.

In conclusion, a gateway acts as a bridge between networks operating with different protocols. It enables communication, manages protocol conversion, routes data packets, and ensures the seamless exchange of information between networks. The primary function of a gateway is to connect different networks operating with different protocols and facilitate the transmission of data between them.

The primary function of a Gateway in a computer network is to connect different networks operating with different protocols. Unlike routers, which primarily route data based on IP addresses, gateways can operate in any layer of the OSI model and are used to bridge networks with different communication standards.