The communication protocols

Unite 8: Communication Technology NET-YR1-P3

Throughout this document I will explain at least two communication protocols and at least one protocol. With these protocols that I will be talking about are commonly used whenever we use a computer of all sorts. The names of the protocols in which I will be talking about are SMT (Simple Mail Transfer), SNA (Systems Network Architecture) and TCP (Transmission Control Protocol). These where protocols are widely used around the world, these protocols help computer networks to communicate with each other effectively.

SMTP (Simple Mail Transfer Protocol)

This is a mail protocol of the internet. If you are integrating your LAN e-mail system with the internet, you will most likely interface with the Simple Mail Transport Protocol. Below in the chart is some SMTP command and what they mean.

SNA (Systems Network Architecture)

SNA is one of the most popular network architecture models. SNA was build buy IBM. Although SNA model is now considered a legacy networking model, SNA is still widely deployed around the world. SNA was designed around the host-to-terminal communication model that IBM's mainframes use. IBM expanded the SNA protocol to support peer-to-peer networking. This expansion was deemed Advanced Peer-to-Peer networking. SNA is IBM's proprietary networking design. It was initially developed in 1974 according to the hierarchical model of network used by IBM at that time. The device in the hierarchy includes hosts or mainframes, communication controllers, cluster control and terminals. In 1984, IBM added support for advance features, such as distributed processing, internetworking, and network management. This extension is known as advance Peer-to-Peer Networking, or in shorter terms APPN.

TCP (Transmission Control Protocol)

TCP is one of the two original components of the suite Internet Protocol, so the entire suite is commonly referred to as TCP/IP. Whereas Internet Protocol handles lower-level transmissions from computer to computer as a message makes its way across the Internet. TCP which we know as Transmission Control Protocol operates at a higher level of communication, concerned only with the two end systems. This could be the Web browser and a Web server. In addition, TCP provides reliable, ordered delivery of a stream of bytes from a program on one computer to another program on another computer. In addition the Web or other common applications of TCP include e-mail and file transfer. Among its other management tasks, TCP controls segment size, flow control, the rate at which data is exchanged, and network traffic congestion.



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