A gateway is a network device that acts as a translator between different network systems or protocols, enabling communication between dissimilar networks.
Gateway: A Layer 3 (and above) device that connects networks using different architectures, protocols, or data formats.
| Specification | Description |
|---|---|
| Layer | Operates at OSI Layer 3 or higher (Network to Application) |
| Interface Support | Multiple types: Ethernet, DSL, Serial, etc. |
| Protocols Supported | TCP/IP, MPLS, SIP, X.25, IPv6, etc. |
| Throughput | Depends on network type; varies from Mbps to Gbps |
| Security | May include firewall, NAT, and VPN support |
| Integration | Often combined with routers or firewalls in modern setups |
A gateway is a critical network component that enables communication between different protocols and systems. It serves as a translator and connector, making it essential for modern, complex, and heterogeneous networks.