IP operates at layer 3, this is the NETWORK LAYER in the OSI Model.
Network+ Guide to Networks
Fifth Edition
Ch02, pg56, Figure 2-7
TCP and UDP are transport layer protocols; the OSI layer is layer 4 (transport)
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).
IP addresses are used primarily by layer 3 (network layer) of the OSI model for routine purposes.
Hubs are a physical layer (layer 1) device; most switches operate at the Data Link layer (Layer 2) of the OSI model.
layer 3 , network 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 - network addressing.
DHCP runs at the application layer of the OSI model.
Layer 3 of the OSI model. An ICMP header follows the IP header of the IP packet.
Layer 3
3
Router is a Layer 3 (Network Layer)device that checks packet's IP Address at input interface & routes them to interface connected to destination network if available.