In an lan domain, is similar to a hub but can filter traffic, a connects lans, or a lan and a wan, and a is a software or hardware device that filters traffic in and out of a lan.

Switch, router, firewall

Explanation:

The function of the switch is to distribute the network to different networks similar in functioning to that of the hub but it performs filtering of the traffic present in the network using various traffic filtering algorithms.

The router whose main function is to route packets across the network is also used to connect between LANs and between LAN and a WAN.

The firewall is typically installed on systems or in servers or in routers with it most important function to filtering the traffic and minimize the packet delivery delay in LANs.

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