What_are_the_devices_used_in_osi_transport_layerNetwork Devices Used in Transport Layer: The Brouter (Bridge router), Gateway and Cable tester work on the transport layer.for more about devices used in 7 layers of OSI model go: http://www.networktutorials.info/osi_layers.html
Interfaces used on the system to connect to Network devices reside on Physical layer.
hub is the device that is used to extend the lan segment and used at layer1 that is physical layer.
A Hub or a Switch
Physical layer = Hub, NIC, Repeater. Data Link Layer = Switch, Bridge. Network Layer = Router.
If devices are within the same network then they operate at the second layer.
Layer 1 (hubs) or Layer 2 (bridges or switches) devices.
Hubs and Switches
Repeaters and hubs
Routers
The layer 2 devices use the data link layer addresses.
Switches are generally considered layer 2 devices, but many are capable of operating at layers 3, 4 or higher. Most hubs are amplifying the electrical signal; therefore, they are really repeaters with several ports. Hubs and repeaters are Layer 1 (physical layer) devices.