Device

Operates at

Messages

Physical Layer

Data Link Layer

Network Layer

Hub

Physical Layer

All messages transferred

Same or different

Same

Same

Bridge

Data link layer

Filtered using data link layer addresses

Same or different

Same

Same

Switch

Data link layer

Filtered using data link layer addresses

Same or different

Same

Same

Router

Network Layer

Routed using network layer addresses

Same or different

Same or different

Same

Brouter

Data link layer and network layer

Filtered and routed

Same or different

Same or different

Same

Gateway

Network layer

Routed using network layer addresses

Same or different

Same or different

Same or different