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The packets are carried at the data link layer of the underlying network as raw payload. In the case of Ethernet, a 0x0806 EtherType value is used to identify ARP frames. The size of the ARP message depends on the link layer and network layer address sizes.
Data-link frames, as these protocol data units are called, do not cross the boundaries of a local area network. Inter-network routing and global addressing are higher-layer functions, allowing data-link protocols to focus on local delivery, addressing, and media arbitration. In this way, the data link layer is analogous to a neighborhood ...
FDDI Fiber Distributed Data Interface; Frame Relay; ITU-T G.hn; HDLC High-Level Data Link Control; IEEE 802.11 WiFi; IEEE 802.16 WiMAX; LACP Link Aggregation Control Protocol; LattisNet; LocalTalk; L2F Layer 2 Forwarding Protocol; L2TP Layer 2 Tunneling Protocol; LLDP Link Layer Discovery Protocol; LLDP-MED Link Layer Discovery Protocol - Media ...
The link layer in TCP/IP is still wider in scope and in principle a different concept and terminology of classification. This may be observed when certain protocols, such as ARP, which is confined to the link layer in the TCP/IP model, is often said to fit between OSI's data link layer and the network layer.
Reverse ARP differs from the Inverse Address Resolution Protocol (InARP), which is designed to obtain the IP address associated with a local Frame Relay data link connection identifier. [2] InARP is not used in Ethernet.
In computer networking, an Ethernet frame is a data link layer protocol data unit and uses the underlying Ethernet physical layer transport mechanisms. In other words, a data unit on an Ethernet link transports an Ethernet frame as its payload. [2]
EtherType is a two-octet field in an Ethernet frame.It is used to indicate which protocol is encapsulated in the payload of the frame and is used at the receiving end by the data link layer to determine how the payload is processed.
The services and protocols specified in IEEE 802 map to the lower two layers (data link and physical) of the seven-layer Open Systems Interconnection (OSI) networking reference model. IEEE 802 divides the OSI data link layer into two sub-layers: logical link control (LLC) and medium access control (MAC), as follows: Data link layer. LLC sublayer