Some users wish to handle their own unnumbered information packets on the network without the aid of the data link layer within the Standard Ethernet Data Link Control (DLCETHER). This decision results in protocol constraints from their individual service access points (SAPs). A direct network interface is provided that allows an entire packet to be generated and sent by a user once the user SAP has been opened. This provision allows full control of every field in the data link header for each write issued. Also provided is the ability to view the entire packet contents on received frames.
The criteria for a direct network write require that: