SCO PPP provides for the use of TCP/IP network
applications (for example, telnet) over serial lines
by linking serial lines to the IP protocol driver through
a series of drivers and modules called the PPP STREAMS
stack.
In addition, the drivers and modules implement various Internet
standards that govern the transmission of data over
serial lines attached to the PPP STREAMS stack.
The SCO PPP STREAMS stack consists of:
the packet filter module, see
ipf(ADMP)
the PPP driver, see
ppp(ADMP)
the asynchronous HDLC (asyh) protocol module, see
asyhdlc(ADMP)
the STREAMS message to clist conversion driver, see
mbcl(ADMP)
The most important component in the stack is the PPP
driver that handles
the framing of the IP packets for their
transmission and reception over serial lines.
Another important function of this driver is PPP
negotiation with the remote
host that ensures a sound connection before any transmission
of application data.
(For more information on these components, see the appropriate
manual page.)