The Network Interface layer
Primarily at layer 1 and 2. The frame adds this information for these layers.
physical and data link
The network access layer equivalent to the physical and data link layers of the osi model. basically this layer defines how data is physically sent through the network. There are several OSI and TCP/IP model video tutorials online.
TCP/IP because the osi model has seven layer but in tcp/ip only four layers and most important is that the tcp/ip model is reduce the function of osi model.
In the TCP IP model, routers belong in layer 3. This is a common model used in setting up information technology systems.
internet
What is the purpose of the TCP/IP Network Access layer
The Network Layer in the TCP/IP model is responsible for routing data packets between different networks. It determines the best path for data to travel from the source to the destination through various interconnected networks. The Internet Protocol (IP) is the main protocol used at this layer to address and forward packets.
Only the Network Layer (Layer 3) portion of the datagram is used by the Network Layer (Layer 3) portion of the TCP/IP Model. The network portion of the datagram includes IP Addressing information, and things such as TTL (Time to Live), and Datagram Priority markings.
DHCP is a layer-4 protocol, most commonly transported over UDP. UDP port number 67 is the destination port of a server, and UDP port number 68 is used by the client
Multiplexing
Offcourse osi..... TCP/IP is an implementation of osi....