Data solutions for Data Center - Part 1

In this note, we will work to provide the information necessary to understand the concepts and terms related to the solutions of data within the data center environment, current solutions and market trends. The document aims to provide the tools necessary to become familiar with the issue and bring the business advisor to the routine of Data Solutions within a Data Center environment.

OUR DEFINITION OF DATA NETWORK.

We speak in this working data centers (or data center) and within this concept, we refer to "Network" or "Network Data" as the set of equipment involved in the process of communicating, connecting and providing access to information.


BRIEF HISTORY.

In 1746, French scientist and religious Jean-Antoine Nollet performed an experiment on the transmission of electricity using iron wire as a medium, which subsequently and with the contribution of other discoveries, gives rise to the first form of electric transmission, telegraph.

We could consider that the history of communication networks using electrical means, began to experiment Nollet, through different stages of development of the telegraph, moving toward the "second" age of communications, with the invention of the telephone by Antonio Meucci (1857-1860) and the first telephone exchange in 1877 (invented by Hungarian Tivadar Puskás, who worked with Thomas Edison). Bell Labs, founded that year, are responsible for the growth, development and improvement of the telephone in the following years.

Moreover, both the computer and the computer system we know today, moving from such ancient roots as the invention of "algorithm" by the Persian mathematician and engineer Musa al-Khwarizmi (780-850) and move up to the 1940 (first electro-mechanical calculator, developed at Bell lab), through the invention of ENIAC (first electronic computer mainframe general purpose built in 1946), minicomputers, microcomputers (PC or Personal computer), mobile and other developments to this day.

Before the year 1969, computers were not just type "mainframe" systems, but they were isolated without communication with other external equipment systems. After several years of development, the ARPA agency within the Department of Defense of the USA takes the interface between different computers, giving birth to the first data network, the ARPANET (four nodes), which used telephone networks as a means communication through telephone modems and allow interconnection of different equipment remotely.

For the moment it is established what we call the first "Data Network" (ARPANET), and had spent more than 90 years of interconnecting telephone exchanges and had a whole development of interconnection of the nodes based on hierarchies (Red hierarchical) subscriber connection, regional, provincial, interconnection with other operators, international, etc.

In fact, the development of data networks has used developments in telephony and we see this, for example, in the work done by Charles Clos in 1952 optimization phone to get a free network blockages networks. His work was taken as basis for the development of some of the topologies used today by manufacturers such as Juniper, CISCO and AVAYA solutions for data networks, especially in DC environments. So-called "Clos Networks" is an approach to a NETWORK FABRIC, networking trend, especially in DC.

DEVELOPMENT NETWORK.

In the era of mainframe isolated, no need to talk about network topologies, but after the appearance of the first minicomputer in 1963 (under the mainframe, but higher than the "personal computers" that first appear in 1971), the need to interconnect these systems 'networked'.

IBM developed for this purpose, a solution called "Token Ring" design is attributed to EE Newhall in 1969. This interconnection architecture is developed by IBM in 1970 and used a device known as MSAU or MAU (Media access unit or Unit Multiple access Station) to join the teams: mainframe and / or mini-computers locally. Although physically linking MAU devices "star" operation at logic level is "ring", since a shift / "token" is assigned to each computer in an orderly manner and in the same direction to complete all devices , after which it starts again with the same sequence.

With the introduction of Computers / Personal Computer in 1971, and its popularity prompted by the huge difference in price with the mainframe and minicomputers, the market began a course of development in terms of interconnection equipment. On the one hand we have developments in the means of connection: coaxial, twisted pair, fiber, wireless, etc., and on the other hand we have the emergence of the Ethernet standard, and the set of TCP / IP protocols (among many) that have been developed and passed down to our times.

During the 60s and 70s a diverse range of equipment associated with the computer systems were available: computers or supercomputers, minicomputers, microcomputers or personal computers, printers, terminals, storage systems, etc. All these terminals should be interconnected for operation and although there ways to do (such as that used IBM MAU), not always the maximum distances, requiring physical modifications were met. From this arises the need to create ways to "expand" those distances on different physical media used for interconnection.

It is these events that give rise to the development of "networks" and that after the passing of the years brought its own language networks. From this point, we can start with the descriptions of the basic logical / physical network level, an issue that we will see in a following note topologies.

Sincerely,

Ivan M. Jimenez
DataCenter Specialist
Data Solutions for DC
Anixter Inc. - CALA Region