1. Repeaters (Operate at the OSI Physical Layer).
2. Bridges (Operate at the OSI Data Link Layer).
3. Routers {and Brouters} (Operate at the OSI Network Layer).
Gateway
routers
Yes, they are devices that operate at different layers of the OSI model for networking.
If devices are within the same network then they operate at the second layer.
Answering "What are the advantages and disadvantages of OSI model?"
Hubs and repeaters operate at the Physical Layer of the OSI Model. The Physical Layer is the first layer of the OSI Model.
Gateway network device
Go to the Wiki for OSI model -that discussion and listing is very good.
OSI
In the early 1980s, the International Standards Organization (ISO) developed the Open Systems Interconnect (OSI) model, which was defined in ISO standard 7498-1, to standardize the way devices communicate on a network. This model has seven layers In the early 1980s, the International Standards Organization (ISO) developed the Open Systems Interconnect (OSI) model, which was defined in ISO standard 7498-1, to standardize the way devices communicate on a network. This model has seven layers
transport
Hub