Roll your own
Intranet
Learn about TCP, IP, ICMP, UDP, Ethernet and others at the byte level, not
at just the WinSock level. See the actual bytes which flash across the lines
when you use the Internet. This may not be as practical as using the WinSock,
but it's just about as deep as you can dig into the innards of the Internet.
A must read for any serious Internet enthusiast.
FlatStack A half credit
card sized hybrid integrated circuit, which implements a complete
TCPIP/PPP/UDP/HTTP/POP3/SMTP protocol suite for 8-bit microcontrollers
Seiko iChip S7600A. It is a TCP/IP protocol
stack IC that will allow 8 bit micros to have TCP/IP connectivity (Internet,
Ethernet).