![]() Routers typically have at least two network ports, which allow them to connect to other devices on the network. Hardware-based routers are usually found in enterprise environments, while software-based routers are often used in small office/home office (SOHO) environments. Routers use protocols such as Ethernet, Token Ring, Asynchronous Transfer Mode, and Frame Relay to determine how data is routed. Routers can be hardware-based or software-based. They can be used to connect two LANs (Local Area Networks), WANs (Wide Area Networks), or a LAN to a WAN. ![]() Routers are devices that link two or more networks. Outgoing traffic from one local area network segment will cross at least one Router before it leaves the organization and enters another local area network segment on the other side of an internetwork boundary, where it will likely cross another set of routers before exiting onto an external network such as the Internet. Network traffic about its destination can be categorized as outgoing or incoming traffic about its source can be either internal or external.
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