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In order to implement the Internet Caf� idea, there are several issues that need to be taken into consideration. Setting up an Internet Caf� is not just the matter of connecting computers and accesing Internet, there are some crucial points to be obsrrve in order for running the Caf� succesfuly, and these points include chhosing the right networking decision, computer networking equipments, Internet Service Provider (ISP), security and costs etc.
Firstly, I will explain the basic of networking and will choose the best possible option for the Mill Caf�.
This report is divided into the following main sections
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Networking (Basic Concepts)
Networking are an interconnection of compuers. These computers can be linked together using a wide varity of different cabling types and for a wide varity of different purposes. The basic reason why computers are networked are
To share resources (files, printers,modems, fax machines etc.)
To share application software (MS office, Excell)
Increase productivity ( make it easier to share data amongst usrers)
The thre basic types of network include
• Local Area Network (LAN)
• Metropolitan Area Network(MAN)
• Wide Area Network(WAN)
Local Area Network(LAN)
Local Area Network is a network that is confirmed to a relatively small area. It is generally limited to a geographic area such as a writing lab, school, a building. Rarely are Lan computers more than a mile apart. In a typical lan configuration one computer is designated as file server. It stores all of the software that controls the network, as well as the software that can be shared by computers attached to the network computers connected to the file server are called workstations. The work station can be less powerfull than the file server, and they may have additional software on their hard drives. On most LANs, cable are used to connect the Network Interface Card (NIC) in eacc computer.
LAN is the most likely used network for Internet Caf�, as the Mill Caf� will be based on one single building therefore I will employ the LAN technology for you Mill Caf�. However, below I have briefly explain the term of MAN and WAN technology.
Wide Area Network(WAN)
The interconnection of various LANs through telephone network which unites geographically distributed users is achived through WAN. In short when we log to the Internet we become a part of a WAN.
Metropolitan Area Network (MAN)
A Metropolitan Area Network is one of a number of types network. A MAN is a relatively new class of network, it serves a role similar to an Internet Service Provider (ISP) but for corporate udders with large LANs. A MAN aim to serve geographic area beond the scope of LAN technologies.
From the above definitions of different types of networking, it is clear that you will be using LAN for your MILL Caf�.
Protocols
At this point I will need to decide what method of Local Area Networking to be used to link your computers together. Networking is not something that will depreciate as the computers themselves. A Local Area Network or LAN is a means of connecting computers together to allow them to share resources, data and services. The basic additin to a PC is the Network Interface Card or NIC. A NIC is installed into each computer and then connected to the others in the network. There are several types of configuration or topologies as well as protocols.
A protocaol is a set of rules that governs the communicatrion between computers on a network. These rules include guidelines that regulate the following characteristics of a network. Access method , allowed physical topologies, types of cabling and speed of data transfer. The most common protocols are
Ethernet
Token ring
FDDI
ATM
Before deciding which protocols to use for your Mill Caf� I will briefly discuss the concept of conventional cabling vs. the Wireless office, It is important to go over some isues in order to take the right decision whwther to use cable or wireless for your Mill Caf�. Below I have outline some advantages and disadvantages of cable and wireless.
Cables
Advantages
Cable network are faster (100mbps/sec vs 11mbps/sec)
Cable network are more security conscious
Cable network tend to utilize existing Ethernet cards in PCs
Disadvantages
Cable can be a mess
Cable can be expensive
Cables can cut or damaged
Wireless
Advantages
Wireless network are easy to install
Wireless network are not bound to certain areas of your office/ Internet Caf�
No messy cabling
Disadvantages
Wireless communication can interface with youer phones
Chances are someone could access your LAN from outside the Caf�
Network card can be expensive.
From the above advantages and disadvantages of cabling and wireless it is clear that for the Mill Caf�network Cabling solutuin would be perfect. The reason for using cabling is the increased security for network users. In poor wether wireless perform badly, since the Mill caf� network will not have ant laptop therefore no chance to mobility and therefore no need for wireless. Although cabling is expensive but it is faster than wireless which is important for successful network and user satisfaction.
For your Mill Caf� you will be using Ethernet as it is the most popular, fast and cheap technology, used to connect computers together in a Local Araea Networking (LAN)
Below I have outlined a little description of Ethernet-
The Ethernet protocol is by far the most widely used. Ethernet uses an access method called CSMA/CD ( Carrier Sense Multipple Access/ Collision Ditetction). This is a system ehere each computer listens to the cable before sending anything through the network. If the network is clear, the computer will transmit, if some other node is already transmiting on the cable , the computer will wait and try again when the line clear. Sometimes two computers attempt to transmit at the same time instant. When this happens a collision occours. Each computers than backs off and waits a random amount of time before attempting to retransmit . with this access method , it is normal to have collision. However, the delay caused by collisions and retransmitting is very small and does not normally effect the speed of transmission on the network. The Ethernet protocol allows for linear bus, star or tree topologies. Data can be transmitted over twisted pair, ata speed of 10 mbps.
Ethernet
Types of wiring Rated capacity over 0mt or less
UTP Cat 16mbps
UTP Cat4 0mbps
UTP Cat5 100mbps
Coaxial 100mbps
Fibre 1000mbps
UTP(Unsheilded Twisted Pair ) comes in both category (10base �T for 10mbpsnetworking) and category 5 (100mbps Tx for 100mbps fast Ethernet networking). It is thin flexible and easy to use with the common RJ45 connector.
The two main advantages of twisted pair networks are the low cost of the cables and the ease of installation in a star network. Another benefity is its ability to quickly resolve failed connections. In a twisted pair network, if a connection fails somewhere on the network between a node and the hub, only that node is disabled. The rest of the network is unaffected except for the inability to access that node. The easy way to resolve this problem is to replace one segment of cable at the failed node. If the failure occour in the link between two hubs, the two connected hubs continue to operate separately, although they are isolated from each other network resources. Using twisted pair networking is useful in the sense that if if the network were to expznd it can easily be done by using commercially available twisted pair “crossover” cable. You can connect your existing hub or switch directly to another hub or switch or bridge without any complication.
Although Cat5 is slightly expensive than Cat we will be using Cat5 for your Mill Caf� as thos will enhance the performance of networking, giving more flexibility and giving scope for future improvement.
The reason I’m not recommending you to use Fibre is because it’s expensive and the interface card for fibre is also very expensive. Although it has the advantage of large capacity and can caover agreater distance, and the reason for not using coaxial is because coaxial cable EIA/TIA no longer has a standard for coax. Therefore, finally I will recommend you to use Unshielded Twisted PairUTP) Ethernet for its flexibility, neat and less prone network faults.
Topology
In order to choose the best topology for the Mill Caf� I will be looking at diferwnt topology that are available with LAN networking, below are a brief discussion of star, bus and ring topology
The physical topology of a network refers to the configuration of cables, computers and others pheripherals. This is an arrangement of nodes and cable in a LAN, and is used in two general configuration bus and star. The two topology define how nodes are connected to one another.
STAR
A star topology is designed with each node (file server, workstations, and pheripherals) connected directly to a central network switch or hub. Data on a star network passes through the switch before continuing to its destination. The switch manage and control all functions of network. It also act as a repeater for the data flow. This configuration is common with twisted pair cable. As the Mill Caf� network using 10 base T Ethernet and using switches the star topology will be the best choice.
BUS
The bus topology consists of nodes which connect to a diterminated main linear cable (the backbone) the bus topology requires the least amount of cabling and network equipment making it the most cost effectve topology.
As the Mill Caf� will be based on one single building with threee floors there is a need of backbone networking . backbone is the main cabling of network tht all of the segments connects to. Typically, the backbone is capable of carrying more information than the individual segments. For example, each segment may have atransfer rate of 10mbps while the backbone may operate at 100mbps. The most likely backbone I will recommend for the Mill Caf� is the collapsed backbone as the collapsed backbone network usually use the star topology which is my recommended topology for your internet caf�, and this will use the device normally a switch as a center. In a collapsed backbone there are more cable but fewew devices and there ids no need for backbone cable which will only exists in the switch.the advantages f collapsed bacjbone simply is the improve performance.
Since all the backbone devices will be in the same physical location nd all traffic will flow through the switch this will enhance the performance of network. Also the advantages of this is that if any new cable is needed this all can be done in one place. The backbone device switch will be connected to different switches in different floors and each ports of the switch will be commected to eacc node via a pair of RJ45 connectors. Another advantages of using switch is that if a node is fails this will nort create any problem for others only this node will be disabledand will be easy to fix it without any ineraptopon to others.
I recommended the Ethernet protocol for this Mill Caf�. Which is a shared media, so there ae rules for sending a packets of data to avoid conflicts and protact data integrity. In the Caf� networking, nodes will determine when the network is available for sending packets. This is most likely to happen in the caf� that two nodes at different location attempt to send data at the same time. When both PCs are transferring a packet to the network at the same time, a collision will result . minimizing collision is a critical element in the design and operation for you cafr network. The collision are lokely to happen when all PCs are in use within the network bandwidth and the user will face the slow performance of the network. Therefore, the best solution would be to use the backbone switch, as it will transmit information directly to the right destination witout delay meaning less traffic and improved performance.
So far We have employed a network topology and have choosen the protocol. Now to implement the networking functionality we need several components. Which are a server, switches, print server, printers, router/firewall for internet access, NIC ect. Below I will start with the server functionality for you mill caf� and will choose the best possible server.
Server
A server is a computer or device on network that manages network resourcrs. For example, a file server or a print server. For the Mill Caf� network we will have file server which will store all the necessary application that can be accecsed by users of caf� as required. The advantage and the function of the serer would be simply to share the files. Here we will keep the necessary application that are most likely to use by the Caf� users, for example MS word, as the users of the Mill caf� will not only be using the Internet but other programmes by their needs. This will save money as we don’t have install the application in each PC, and therefore will save time and costs.
Since the server stand at the heart of the network , it has to be very fast computer with a large amount of Ram and storage space along wth the first Network Interface Card. The network operating system software wil be reside on this coputer, along with any software application and data files that need to be shared.
The server will control the communication of information between the needs on s network. To complete the required activity as a server for the Mill Caf� I suggest that it will be justify to purcahese the server specifiedin in page…………and it will justify the cost . because it gives large amount of storage space and RAM, which are basic need for storing the application software. also security components of RAID.
My recommendation to use the Dell’s Power edge 600SC server which is ideal for your Mill Caf�, that offers latest DDR memory, gigabit NIC, faster networking service with raid controller, the server has the facility for for data protection that support high capacity tape back up solution with internal tape backup drives. RAID Redundant Array of Inexpensive Disks) it’s a category of disk drive that employ two or more drives in combination for a fault tolerance such as power failure. The dell server include the RAID which is very important for network user to get the most advantage out of the Mill Caf�. Server will have CERC ATA 100 IDE RAID controller with a IDE RAID 1 connectivity which write all the data to two drives, this is a very good entry level redundant system since only two drives are required, in this level where monitoring occours that means a write occours in mirror disks. In the event of a disk failure the RAID controller uses either the mirror drive or the data drive for data recovery and continues operation. This server will also have a power vault tape backup unit called PV100T IDE TR5 internal TBU. DAT tape DDS single an essensial tape back up for powrvault tape drives.
For increased security purposes, in case of power failure, a failure backing up sysem is required and the server I suggest comes with uninteruptable power supplies called APC smart UPS 700i stand alone 700 VA 10, therefore in the event of a power failure the server will continue to operate until the power is restored and no need of worrying to loose valuable data therefore maximized the Mill Caf� security.
Below is the specification for the recommended Mill Caf� server
Model Dell Power Edge 600SC � IDE
Processor Intel Pentium 4 processor 1.8 GHz with 51 k enhanced cache.
Memory 56 MB DDR ECC
IDE RAID CERC ATA 100 IDE RAID controller.
IDE RAID connectivity RAID 1
Hard Drive 40 GB total hard disk drive space ( x 0 GB passive 1” 700 rpm IDE hard drive)
Storage device and recordablr media 48 x max IDE CD ROM
Power Vault Tape Backup Unit PPV 100T IDE 10GB TR5 internal TBU
Tape Back Up essensials for Power Vault tape drives DAT tape DDS single
Tape Back Up Software PS4.0 Vritas server edition
Monitor Dell 15” Flat Panel Monitor
Network Card Intel Copper Ethernet with 6.0 drivers
Operating system Windows 000 server SP with 5 CAL
Uninterruptable Power Supply APC smart UPS 700i stand alone 700 VA 10
Costs £
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