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Design and Installation of Internal Network for the Air Force Base Computer Training Center The Air Force Base Network Standardization and Evaluation Section is responsible for the training, licensing, and certifying of network professionals through the use of in-residence courses, computer based training (CBT), and formal task evaluations. There are 18 Network Control Center (NCC) personnel assigned to manage the backbone of the base network and over 40 system administrators and workgroup managers who manage their respective units on base. They all require training and certification by October 2000 to be authorized to perform maintenance and operations on the Air Force network. Our immediate task is to design and install an internal network (separate from the current operational base MAN) to support a classroom consisting of eight students and an instructor.
It is important to develop a training program that replicates as many real-world scenarios as possible. The main objectives of the course will be to train individuals on basic networking principles, MS NT 4. 0 Workstation, and Microsoft NT 4. 0 Server. The course will include both lecture and hands-on performance tasks. To complete this task I will cover the guidelines and limitations associated with planning, classroom set-up, and installing the network.
Also, the objective of the course and the curriculum will determine the type of network and the necessary equipment required. We will cover the type of hardware, media, and software required as well as, facility, and personnel issues, keeping within a limited budget. In addition, network types, topologies, protocols, hardware / software configuration and optimization will be discussed. Finally, it is important that we consider the management, upgrading, and overall maintenance of the network. Before we begin with the planning and installation process we will first look at a brief background of our purpose and mission. The Air Forces goal with this project is to accomplish the task of training and certifying network professionals in the most effective and efficient manner.
The cost savings would be tremendous by locally training versus the thousands of dollars spent to send each individual to a commercial course. Additionally, our training can be tailored to specific features of the Afb's network. One challenge however, is to convince senior leadership and the old heads the importance of new technology and the training that goes with it. You would think that the Air Force being a government agency would have the funding necessary for the project.
However, most of the money is put towards operational areas such as flying and aircraft maintenance. Training, unfortunately, is secondary and little funding is allocated to training programs. So cost is a major factor. When putting our network together in our classroom we had to use what we could find (computers, printers, media, connectors, furniture etc. ). We also have some surplus equipment and materials in various locations throughout the base. PLANNING AND DESIGNING THE NETWORK LAYOUT We were initially expected to install the entire network with excess equipment we could find throughout the base.
However, we convinced them to fund new personal computers. We were able to purchased ten new Dell Dimension XPS T 500 systems. These systems include a 500 MHz Pentium III processor, 8. 0 GB hard drive, 64 MB RAM, and a 10 / 100 Mbps Fast Ethernet PCI Network card. Eight of these ten systems will be used as student workstations and / or server, depending on the course objective; one will be used as the instructors computer and also act as a main file server, and the last PC will function as an additional server for printing and other special training requirements. With a large surplus of monitors on base we were able to obtain ten 15 monitors to use with each system. We chose 15 monitors over the larger 17 size, due to the limited desk space each student has.
Two Cabletron Micrommac- 24 E 24 port hubs will be used to connect the eight workstations (four per hub). The Micrommac- 24 E is an intelligent workgroup hub combining sophisticated SNMP management with Ethernet repeater functionality and Cabletron's BRIM (Bridge/Router Interface Module) technology. The Micrommac- 24 E conforms to the IEEE 802. 3 Repeater, 802. 1 d Bridge and 10 Base-T specifications. Each hub with four workstations connected in a physical star topology will be independent from each other in a peer-to-peer environment for that portion of the curriculum.
A Cisco AGS+ modular router will then connect the two peer-to-peer networks to the two Dell Computers acting as file and print servers in a client-server environment. The AGS+ is a modular router chassis incorporating a nine-slot Multibus backplane and a five-slot high-speed backplane called the Cisco Bus. The following figure shows the front and rear view of the chassis: An HP 612 DeskJet Printer will be connected to the print server with an IEEE- 1284 parallel cable. It will be used primarily for training purposes to show print capability. Media selection was made easy because we had several spools of CAT 5 UTP cable and RJ- 45 connectors available to us. Because extreme speed is not of real importance and little or no outside noise interference existing, this proved to be more than adequate.
We selected Microsoft Windows NT 4. 0 as our network operating system, which is the standard throughout the base and the Air Force. Each computer arrived with a preinstalled licensed version of Microsoft Windows NT 4. 0 Workstation and Office 2000 along with back-up copies on CD-ROM. Additionally, we received the latest upgrade (Service Pack 6 a), which we requested from Microsoft. We had to make a purchase for Microsoft Windows NT Server 4. 0.
The cost for 10 licensed copies totaled approximately $ 6, 200. Other software used includes Norton AntiVirus NT v 5. 0, Adobe Acrobat Reader 4. 0, and Netscape Communicator 4. 7. The base currently has a multi-user license for this additional software and will be used primarily for training purposes. Each student will configure each system with all the main software just like they would back in their work center. The following chart shows the minimum and recommended system requirements for the software installation: Software Processor Hard Disk Space RAM Minimum Recommend Minimum Recommend Minimum Recommend NT Workstation 486 33 MHz Pentium II 200 MHz 117 MB 1. 2 GB 12 MB 16 MB NT Server 486 33 MHz Pentium II 200 MHz 120 MB 2. 0 GB 16 MB 128 MB Office 2000 Pentium 75 MHz Pentium II 200 MHz 250 MB 500 MB 8 MB 16 MB Adobe Acrobat 48633 MHz Pentium 75 MHz 75 MB 100 MB 24 MB 32 MB Netscape Communicator 48633 MHz Pentium 75 MHz 14 MB 100 MB 16 MB 32 MB The course objective and curriculum dictates what type of network will be installed.
The cabling will be preinstalled within the classroom to the various locations where it will be utilized. The course curriculum includes performance tasks for the students to connect the cable to the various components located on the equipment rack and the individual workstations. There are several issues to consider before building the network. First, the length of the cable from the hub to any component can be no longer than 100 meters (328 feet). If the distance will exceed 100 meters, then the connection requires the installation of a repeater or another hub. In our case, our network will be confined to a single room.
Therefore, distance will not be a factor. Second, be careful not to wrap the cables around power cords, power supplies or fluorescent lights. All of these emit electrical fi...
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