The Transport Layer
Routers operate at layer 3. LAN switches operate at layer 2. Ethernet hubs operate at layer 1.
NetBEUI is the only listed protocol that is not routable; the rest are.
Bridge operate on data link layer
Hubs are a physical layer (layer 1) device; most switches operate at the Data Link layer (Layer 2) of the OSI model.
IPX/SPX : Routable // TCP/IP : Routable // NetBEUI : Not Routable
Data Link Layer
Hubs and repeaters operate at the Physical Layer of the OSI Model. The Physical Layer is the first layer of the OSI Model.
Layer 3
Session Layer - layer 5Transport Layer - layer 4
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).
no
TCP operates at transport layer