Introduction To Integrated Tcp/Ip Stack - Teltonika T-BoxN12R User Manual

7. INTRODUCTION TO INTEGRATED TCP/IP STACK

In data communication, there is always need for low level communication protocols
to ensure reliable data transmission. The protocol stacks are difficult and expensive to
implement so the Nokia 12 GSM module provides in-build TCP/IP and UDP/IP
transport layer protocol stacks. Standard socket interface is also implemented in the Nokia
12 GSM module to enable usage of these stacks. Also client HTTP protocol is supported
for fetching www-pages from a server.
TCP is a connection-oriented protocol that provides a reliable flow of data between
two applications over networks supporting IP protocol. Currently, TCP/IP can be used
with GSM data calls and GPRS. The TCP/IP protocol implementation in the Nokia 12
GSM module is highly optimised for wireless networks.
The versatility of the TCP/IP protocol makes it ideal for a very wide range of
applications. TCP/IP is used in many well-known applications, such as Web browsers,
Telnet, and FTP. Also, many proprietary applications use TCP/IP to transmit data reliably.
The reliable nature of TCP/IP means that the need for applications to ensure that
data transmissions succeed is minimised. TCP/IP uses a checksum mechanism to ensure
that data is transmitted without errors. Also, TCP/IP incorporates mechanisms for re-
transmitting packets that get lost in networks. These features mean that the customer
applications need not to worry about the details of data transmissions. Since TCP/IP is
widely used, it is very well documented.
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