Advanced Web Communication
(18)
Slim-Link® Server
Slim-Link® Server HTTP Server
The Slim-Link® Server includes an HTTP Server to support user web pages. The Slim-Link® HTTP Server is compatible
with all currently popular Web Browsers including Internet Explorer and Netscape. The Slim-Link® HTTP server can
dynamically create Web pages using the Common Gateway Interface(CGI) to show system status or process data.
A sample web page is included in the Slim-Link® Server embedded firmware. Developers can modify the firmware to
quickly develop a Web Page to suit their application.
Slim-Link® Server TCP/IP Stack
The Slim-Link® Server includes an embedded TCP/IP Stack to support Internet Communications. This stack is
illustrated below using the OSI architechure model. TCP/IP includes four clearly defined layers; Application,
Transport, Network, and Data Link. The presentation and session layers have been bypassed by TCP/IP.
Layer
Definition
Embedded in Slim-Link® Server
7
Application
Web Server / Telnet Server / PPP / SMTP / SNMP
4
Transport
TCP / UDP
3
Network
IP / ICMP
2
Data Link
ARP / Ethernet / PPP
1
Physical
10Base-T
Protocol
Definition
Description
TCP
Transport Control Protocol
The Transport Control Protocol provides the means to insure that
internet communications are reliable.
UDP
User Datagram Protocol
The User Datagram Protocol facilitates the communication from one
machine to another.
IP
Internet Protocol
The Internet Protocol performs three functions in internet
communications: It defines the format of all data. It performs routing
of the data through the network. I defines how hosts an routers should
process the data packets.
ICMP
Internet Control Message
The Internet Control Message Protocol allows routers on the internet
Protocol
to report errors and unexpected occurrences.
ARP
Address Resolution Protocol
The Address Resolution Protocol increases internet efficiency by
binding together machine IP addresses.
PPP
Point to Point Protocol
Point ot Point Protocol permits the transport of datagrams over a point
to point link such a analog modem connection.
10Base-T
IEEE802.3
10Base-T Ethernet provides a 10 Mbps communications bus over a
twisted wire pair.
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