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         LAN/WAN Engineering         

Local Area Networks: Zebase Local Area Network solutions focus on connectivity and integration and encompass Needs Analysis, LAN Design, Implementation, Installation and System Administration. We thrive on integrating NetWare, SUN * Solaris, UnixWare, Linux, Macintosh, TCP/IP, NFS, Microsoft, OS/2 LAN Server, IBM and  SNA, to provide transparent file access, application  sharing and print services to the end users.

LAN Design: Zeasbe presents several alternative designs of laying out the wiring, LAN traffic patterns, LAN segments, backbones, as well as hardware and software. Our goal is to help you to make an intelligent decision based on the above mutually beneficial educational process. 

Client Needs Analysis: Our Planning and Design Program provides a complete analysis of your current information systems, your network, and your objectives for the future. Zebase System Analysts carefully listen to you to understand the nature of your business, your current information systems setup and your future short and long term computing objectives. Zeasbe identifies all the technical, human, growth, & other factors relevant to your enterprise. Zebase uses this information to provide you with a simple yet comprehensive report.

Implementation: Using a time-line chart, Zebase shares with you key steps involved in the installation, estimated installation time and the critical path, so that you understand and plan accordingly, to minimize down time.

Installation of LAN & WAN Networks

  • System Analysis & Design

  • Hardware /Software Procurement  & Installation

  • System Operation & Maintenance

  • Windows .Net, XP, 2000, NT & Windows Me, 98

  • UNIX

  • TCP/IP

  • Novell

  • Software Migration

  • Contract Programming

  • Telecommunications

History:

What Is a Network?

Stand-alone personal computers, first introduced in the late 1970s, gave users the ability to create documents, spreadsheets, and other types of data and save them for future use. For the small business user or home computer enthusiast this was great. For larger companies, however, it was not enough. The larger the company, the greater the need to share information between offices, and sometimes over great distances. The stand-alone computer was not enough for the following reasons: Their small hard drive capacities were inefficient. To print, each computer required a printer attached locally. Sharing documents was cumbersome. People grew tired of having to save to a diskette, then taking that diskette to the recipient. (This procedure was called "sneakernet.")

There was no e-mail. Instead, there was interoffice mail, which was not reliable and frequently was not delivered in a timely manner. To address these problems, networks were born. A network links two or more computers together to communicate and share resources. Their success was a revelation to the computer industry as well as businesses. Now, departments could be linked internally to offer better performance and increase efficiency. You have heard the term "networking" in the business context, where people come together and exchange names for future contact and to give them access to more resources. The same is true with a computer network. A computer network allows computers to link to each otherís resources. For example, in a network every computer does not need a printer connected locally to print. Instead, one computer has a printer connected to it and allows the other computers to access this resource. Because they allow users to share resources, networks offer an increase in performance as well as a decrease in the outlay for new hardware and software.

LANs vs. WANs

Local area networks (LANs) were introduced to connect computers in a single office. Wide area networks (WANs) came to expand the LANs to include networks outside of the local environment and also to distribute resources across distances. Today, LANs can be seen in many businesses, from small to large. WANs are becoming more widely accepted as businesses are becoming more mobile and as more of them are spanning across greater and greater distances. It is important to have an understanding of LANs and WANs as a service professional, because when youíre repairing computers you are likely to come in contact with problems that are associated with the computer being connected to a network.

Local Area Networks (LANs)

The 1970s brought us the minicomputer, which was a smaller version of the mainframe. Whereas the mainframe used centralized processing (all programs ran on the same computer), the minicomputer used distributed processing to access programs across other computers.  By the 1980s, offices were beginning to buy PCs in large numbers. Also, portables were introduced, allowing computing to become mobile. Neither PCs nor portables, however, were efficient in sharing information. As timeliness and security became more important, diskettes were just not cutting it. Offices needed to find a way to implement a better means to share and access resources. This led to the introduction of the first type of PC LAN: ShareNet by Novell. LANs are simply the linking of computers to share resources within a closed environment. After the introduction of ShareNet, more LANs sprouted. The earliest LANs could not cover a great distance. Most of them could only stretch across a single floor of the office and could support no more than 30 users. Further, they were still simple, and only a few software programs supported them. The first software programs that ran on a LAN were not capable of permitting more than one user at a time to use a program (this constraint was known as file locking). Nowadays, we can see multiple users accessing a program at one time, limited only by restrictions at the record level.

Wide Area Networks (WANs)

By the late 1980s, networks were expanding to cover ranges considered geographical in size and were supporting thousands of users. Wide area networks (WANs), first implemented with mainframes at massive government expense, started attracting PC users as networks went to this whole new level. Businesses with offices across the country communicated as if they were only desks apart. Soon the whole world would see a change in its way of doing business, across not only a few miles but across countries. Whereas LANs are limited to single buildings, WANs are able to span buildings, states, countries, and even continental boundaries. Networks of today and tomorrow are not limited anymore by the inability of LANs to cover distance and handle mobility. WANs play an important role in the future development of corporate networks worldwide. Although the primary focus of this chapter is LANs, we will feature a section on WAN connectivity. This section will briefly explain the current technologies and what you should expect to see in the future. If you are interested in more information on LANs or WANs, or if you plan on becoming a networking technician, check your local library resources or the Internet.

 

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