In executive block, there are 11 offices, each with their own PC (stand –alone), and 3 secretary terminals which are connected with the mainframe. Obviously, there is also no network in this block. Therefore, if to photocopy or print a document, the secretary also faces the same problem with that in the office block.
The supply department has 15 PCs which do all the stock control and some of the stock movement is “robotised” and is computer controlled. There are 4 POS terminals in this department. There are 7 PCs used to control the “robotised” movement of the stocks and these PCs are not connected to the mainframe but the remaining 8 PCs are connected to the mainframe using UTP Cat 3 cable. The company relies on the mainframe for prices, stock checking and transaction for the company. In this department, I believe the 15PCs are overload, which often cause work delay or PCs out of order.
There is no computer facility in the workshops and warehouse. Since the workshops should keep communication with other department, especially the design office, therefore, some PCs should be moved in, and a network system should be built in both workshops and warehouses as well.
The connection between the subsidiary firms and the office block are currently using a 56K modem. Each remote POS terminals on the subsidiary firm are connected using a POTS (Plain Old Telephone Service) line. The connection is slow and there are many errors and delay occurred.
Currently, the company has some security cameras on site, and as they have proved a success. Less security video cameras are located in warehouse and workshop for stock. Therefore, more video cameras are intended throughout the site.
Analysis on the Requirements
Overview:
A client-server approach should be used throughout the company so that all the blocks can communicate with each other and in this model data is kept on one or more shared file sever machines. This approach enables that each staff has 1 PC; each PC has its own role. Clients are able to perform many processing functions on their own; recourses are available from the server. And severs may be dedicated to a variety of services, including file sharing, printing, database management and communications, architecture is built in a scalable form. In that case, new advanced servers, printers, photocopiers, scanners etc. should be added for data sharing.
To achieve above resources sharing function and communication purpose, a type of networks - local area network (LAN) is required in each block. All these LANs in each block are then connected to each other and it will form the other type of network - wide area network (WAN). This WAN will also cover the 10 subsidiary firms to the main site. And it will contain a collection of machines (hosts) which are connected by communication subnet (or simply subnet). Therefore, much more machines as hosts and lines are required for WAN communication and a number of switching elements (routers) are required to connect transmission lines.
In addition, three servers are also needed in this network. They are file server, http server, and application server which are connected to the mainframe and stand by. Once one or some of the servers of the company breakdown the stand by servers can be used at once, which avoid losing data and information, and make the network much more reliable.
Detailed view:
There is no need to add some new PCs into design office, because all the PCs in it are high-end PCs. However, they need high speed network for communication so that it will be easier and quicker transfer large design files between the design office and the workshops. Besides, resources sharing will become much easier within a network in the office as well. A condition that the design office is out of the city about 1.5 miles should be considered. In those cases, the IEEE 802.3 version of Ethernet or Token Ring is required in this office. In addition, of course, the transmission media is highly required, such as coaxial cable r.
In the office block, the condition is totally different. All the existing PCs should be upgraded to new PCs or change the existing PCs to complete new ones. Each staff should have his/her own PC. Therefore, 40 new PCs are needed. 10 PCs are used for credit control department, 10 PCs are for account department, 5 PCs are for typing centre and 15 PCs are for pay department. Besides, each department should be at least allocated with one printer, one scanner and one photocopier.
Since the executives need to have in time and accurate information before making any decision. All the PCs in the executive block will be upgraded to high-end PCs or be changed completely. Each office will be allocated with one printer. All the PCs and printer are connected to the network. And just because there are 3 secretary’s terminals are connected to the mainframe, the transmission media is highly required, such as UTP CAT 5.
In this department, there is a need to add an additional PC to manage the POS and another one for database transaction. All the PCs in supply department are to be connected to each other for communications.
Workshop and warehouse both need two extra PCs and one extra printer. This means that 24 PCs and 12 printers are needed for both of them. The warehouse need to have PCs to control the movement of the stock while the workshop needed the PCs for communication with the design office. All this PCs and printers will be connected to the network to print present stock information.
Ten subsidiary firms need to be link as a LAN. Therefore, a new PC is required in each subsidiary firm to manage the network for POS. They also need a leased high speed line to communicate with the main site.
A security office is needed to act as the central control room for viewing and recording. Besides, a total of 10 extra cameras are needed through the main site. All this cameras should not be connected to the network for security reasons, but it will be connected to the security office for central controlling.
Proposed LAN Design
I plan to use Fibre Distributed Data Interchange (FDDI) as the backbone of my design. The office block, supply department, warehouses and workshops are connected to the FDDI. I decide to allocate an extra line to both of the executive block and the design office. So the executive block and the design office are not directly connected to FDDI dual-ring. The reason is that design office requires a higher bandwidth to communicate with the workshops and transfer the data and design plans which are usually large in size and very frequent.
The design office, office block, executive block, warehouses and workshops will use 100 Base-TX and 100 Base-FX of Fast Ethernet. This type of high speed LAN network is suitable because I use FDDI as my backbone which operates at speeds of 100 Mbps per channel using a token ring. The 100 Base-TX makes use of UTP cable which is used in-door or within the building. 100 Base-Fx makes use of the fibre optic cable which is use for out-door connection.
For the design office, I plan to use a star-ring topology. As design office has 6 teams of designers, all PCs and printer in each team is connected to a hub in a star topology using a UTP Cat 5 cable. This team of designers is then connected to the network in ring topology using UTP Cat 5 cable as well.
For office block, I also plan to use a star-ring topology. Each team, printer, scanner and photocopier is connected in star topology. All the PCs in one team are connected in bus topology.
Each department and offices in both office and executive block connects their PCs and printers in a star topology to a hub using UTP Cat 5 cable. As
For the workshops, there should be one as a basic workshop to control or manipulate the others. And all the other workshops will be connected to this basic workshop in a star topology using a multi-mode fibre optic cable.
For the warehouses, it runs as the same as workshops. There should be one as a basic warehouse as well to control or manipulate the others. And all the other warehouses will be connected to this basic one in a star topology using a multi-mode fibre optic cable.
For supply department, 10 PCs and 1 printer for stock control are connects to a hub. 5 PCs for stock movement are connects to another hub and 4 POS and 1 PC is connected to a hub different from previous two. All these hubs are then connected using UTP Cat 5 cable to make a ring topology.
10 subsidiary firms are connected to the supply department; each using a T1 leased line. In each subsidiary firm, all the POS and PCs are connected to a hub using UTP Cat 5 cable to make a star topology.
The mainframe will be remained in the network control room in the office block. Three new servers will be added. They are application server, http server and file server. These servers will be connected to a hub under switched media Fast Ethernet connection using a UTP Cat 5 cable. Then it will connect to the front-end processor (FEP). This FEP will then connect to the mainframe.
For the security reasons, I decide to design a firewall at the network control room. Firewall is used to prevent unauthorized access from outside to the company network for stealing secret information. Besides, this device will make decision which user can use which application software by typing user name and password.
Details of Proposed LAN Design
a) Architecture
I plan to use Fibre Distributed Data Interchange (FDDI) as the backbone of my design. The Fibre Distributed Data Interface (FDDI) specifies a 100-Mbps token-passing, dual-ring LAN using fibre-optic cable. FDDI is frequently used as high-speed backbone technology because of its support for high bandwidth and greater distances than copper. It should be noted that relatively recently, a related copper specification, called Copper Distributed Data Interface (CDDI), has emerged to provide 100-Mbps service over copper. CDDI is the implementation of FDDI protocols over twisted-pair copper wire.
FDDI uses dual-ring architecture with traffic on each ring flowing in opposite directions (called counter-rotating). The dual rings consist of a primary and a secondary ring. During normal operation, the primary ring is used for data transmission, and the secondary ring remains idle. As will be discussed in detail later in this chapter, the primary purpose of the dual rings is to provide superior reliability and robustness.
Figure: FDDI - Network Schematic
Figure: FDDI Uses Counter-Rotating Primary and Secondary Rings
The reasons why I choose FDDI as my backbone of my design are as follow:
- High Speed and Deterministic Technology
FDDI runs at a speed of 100 or 200 Mbps. This results in very good performance for demanding applications which need to transfer large amounts of data in a short amount of time. It is also excellent for servicing the needs of a large number of users to ensure everyone has enough bandwidth. FDDI's token-passing network results in a collision-free network which gives excellent performance even under heavy load (80% + utilization).
b) Long Distance
With an overall ring length of up to 20 km (66,000 feet), FDDI is an excellent choice for building a building-wide or campus network interconnecting several buildings.
c) Fault Tolerance
FDDI's dual ring architecture and the ability to set up a network with the dual homing provides the ability to design networks which can continue to operate even if a cable run is cut or a concentrator should fail. Since FDDI has been in use for several years, the equipment has been thoroughly debugged and is exceptionally stable.
d) Management
FDDI works with all of the popular network management platforms, and most FDDI equipment has management features built-in from the factory.
e) Flexibility
FDDI can be used with any of four cable types, allowing the designer to use less expensive UTP or STP cable where runs are short and fiber optic cable where distances are longer and/or electrical noise is a concern.
I will dedicate a line for both of the design office and executive block. Design office need to have higher bandwidth and faster transmission rate. Besides, most of the file transfers from design office are usually design plan and proposal which are very big in size. Another reason for dedicating a line to the executive block is that those executives have the priority to obtain and store data in a faster manner.
b) Topology
The topology I use for connection of each PCs and printer within design office, office block, executive block, warehouses, workshops, supply department, and subsidiary firms is physical star topology. In addition, for design office, office block and supply department, all the PCs in one team are connected in bus topology, which can save a lot of cables.
A star topology may be the easiest to understand. The star or hub topology is one of the most common network topologies found in most offices and home networks. It has become very popular in contrast to the bus type (which we just spoke about), because of the cost and the ease of troubleshooting. If one computer on the star topology fails, then only the failed computer is unable to send or receive data. The remainder of the network functions normally.
However, in this topology each computer is connected to a central hub or switch, if this device fails, the entire network fails.
Star Topology Advantages:
- Easy to add a jack without changing to a "hybrid" the topology as long as a physical path can be identified for routing cable from the new jack location to the central "hub".
- Easy to troubleshoot if wiring problems arise.
- A cut or broken wire going to one jack will not normally cause problems at other jack locations.
- Easiest to convert to three or more line installation.
- Easiest to convert to "future" technology such as ISDN or key systems
Star Topology Disadvantages
- Initial installation may use more cable than other topologies.
- Central "hub" and its connections are potential failure points if not properly installed. Fortunately, there are devices available to do this correctly.
The architecture used in connecting PCs and printers in these buildings are Fast Ethernet (IEEE 802.3U), because it has a high bandwidth that can accelerate the data transmission. Fast Ethernet is operating at 100Mbps; it is much faster compared to Ethernet which only runs at 10Mbps. Besides, the backbone that I use is FDDI; therefore Fast Ethernet is compatible with a high bandwidth that the FDDI provide.
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Media/ Cabling
Overview
For the connection within office block, executive block, warehouses, workshops and also the designer’s team, I’ll use (Unshielded Twins Pair) UTP Cat 5 cable. UTP Cat 5 cable is suitable to use indoors. Besides, UTP Cat 5 cable is limited to 100 meters in length but the length between each floor in the block is less than 100 meters.
I decide to use fibre optic cables in both design office and executive block for connection to FDDI.
Detailed view:
Design Office
Design office has six 3Com® SuperStack® II Dual Speed Hub 500 12-ports hubs. (Please see appendix figure design office) Each team’s office with 4PCs and a printer are connected to a hub in star topology. All PCs in one team are connected together in bus topology. The cable used within this office is UTP Cat 5 cable through switched media Fast Ethernet 100 Base TX. Because it requires high speed file normally large pictures and all kinds design blueprints transfer. So the speed here is the key point.
Office Block
I will use a multi-mode fibre optic as the backbone in the office block. This is because multi-mode is much cheaper than single-mode fibre optic. Besides, this is just the connection within a building block where the length of the 4-storey building is less than 2 kilometres. Another reason for me to choose fibre optic cable as the backbone in this office block is that they require a high bandwidth that permits a very high data transfer rate. This is because the network control room is in this block and all other block and departments will be accessing the servers in the network control room. It will cause a bottleneck if the data transfer rate is slow.
I’ll use four 24-ports and one 12-ports hub to connect the PCs and printers in each department that allows 100 Mbps connection. These PCs and printers are connected to a hub (3Com® SuperStack® II Dual Speed Hub 500 24-ports) in physical star topology using UTP Cat 5 cable. The speed of the connection used is 100BaseTx of Fast Ethernet as UTP Cat 5 can support Fast Ethernet. I use UTP Cat 5 cable in the building, as it is very flexible and easy to install. I’ll use 3Com® SuperStack® II Dual Speed Hub 500 24-ports because it is inexpensive and offers a smooth way to migrate to higher performance yet support both Ethernet and Fast Ethernet network devices. This hub is stackable hub and it can stack up to 8 hubs per stack. Therefore if the company want to expand their network in future, they can do it easily and with minimum cost.
A hub is used to connect 10 PCs and 1 printer in the Credit Control Department and Accounting Department each. Another hub is used to connect a PC used as a monitoring unit, 5 PCs and 1 printer from the Typing Centre. Besides it also connects the fibre optic cable from executive block and also the design office as that executive block and design office has a dedicated line. Another hub is used to connect all the 15 PCs and 2 printers in Pay Department. As for another hub, which is 3Com® SuperStack® II Dual Speed Hub 500 12-ports where it has only 12 ports. This hub is place in between the monitoring unit and the servers. This hub is use to connect all the 3 servers to the monitoring unit using a UTP Cat 5 cable as well. Besides, if one of the servers breakdown, it won’t affect the other servers. There are still some extra ports in these 4 hubs. These extra ports are kept for future expansion of the network. If any of the departments want to add a new PC or printer or maybe the company wanted to have more servers, they can just connect a UTP Cat 5 cable to the hub.
The mainframe will still be remained in the network control room in the first floor of the office building. The reason I remained the mainframe is for a backup purpose. Although with the servers, it seems like the mainframe is doing a redundant work, but it is actually used as a backup if one or all the servers down and loose all the data and information.
Executive Block
In the executive block, I’ll also use multi-mode fibre optic as the backbone. I have the same reason as why I choose the multi-mode fibre optic as in the office block. In this block, I’ll using six 3Com® SuperStack® II Dual Speed Hub 500 24-ports and two 3Com® SuperStack® II Dual Speed Hub 500 12-ports hubs. Two offices will be sharing one 24-ports hub as all this hubs are stackable. If there is a need to add more PCs or printer, they can just stack the hub. By sharing the hub, I will save cost. Since there are 11 offices in executive block, there is 1 office will use 1 hub. Those hubs in the offices are then connected to the main hub (12-ports) in each floor.
Supply Department
This department has 3 hubs. (Please see appendix figure supply department) 8 PCs for the stock control are connected to one of the hub (3Com® SuperStack® II Dual Speed Hub 500 24-ports) in a star topology. Another hub is used to connect 4 POS terminal and 1 printer. 7 PCs for stock movement and a printer is connected to another hub. These PCs and POS terminal are connected to the hub (3Com® SuperStack® II Dual Speed Hub 500 12-ports) in a star topology. All these hubs and a printer are then connected by a router. All the cable used in this department is UTP Cat 5 cable with the connection speed is 100 Base TX of Fast Ethernet.
Although UTP Cat 3 cable is able to support the network in this department, I use UTP Cat 5 cable because it is good for future expansion. If one day, the company wants to have a faster connection from supply department, UTP Cat 5 cable will be able to meet this requirement. A multi-mode fibre optic cable is connected to the supply department to the network control room the in office block.
Workshops and Warehouses
Although warehouses and workshops are different, I explain it together as they got the same network design. (Pleas see the figure workshop and warehouse) One of the warehouses will be assigned as the base warehouse. 1(one) 3Com® SuperStack® II Dual Speed Hub 500 24-ports hub is placed in the base warehouse. All the PCs and printers from all the warehouses are connects to this hub in a star topology. The cable used in these warehouses is multi-mode fibre optic. Because, multi-mode fibre optic cable can provide a higher bandwidth, as the workshops need to transfer and receive files from design office. All these warehouses are not attached together but they are located less than 2 kilometres away from the master warehouse. Therefore multi-mode fibre optic is suitable to be used in these warehouses and
Subsidiary Firm
Each subsidiary firm has 4 POS terminal and 1 PC. (Please see figure subsidiary) All the POS terminal and PC are then connected to a hub, 3Com® SuperStack® II Dual Speed Hub 500 12-ports in a star topology using the UTP Cat 5 cable. Each of these subsidiary firms made a LAN by itself. Then this hub is connected to a T1 leased line provided by AT&T.
The reason why I use leased line:
In today's business environment the Internet has become an essential communication, information, and marketing tool which needs to be available all of the time. Many companies would lose money if they could not receive orders or e-mails so they need the guarantee of a Service Level Agreement (SLA). This means that should their connection be down longer than the time allowed in the SLA they would receive service credits as compensation.
A leased line gives the customer a direct connection from their network straight in to one of Onyx Internet's Points of Presence (POP), which provides a fast link out onto the Internet. This connection is for the exclusive use of the customer so unlike ADSL they have guaranteed bandwidth all of the time. Leased Lines are suitable for heavy Internet users and they can easily be upgraded as Internet usage or traffic flow increases. This diagram shows how a leased line will provide your network with a fast link out to the Internet
Figure Leased Line
Security Office
I suggest Wall mounted CCTV cameras operation should be installed in each floor in the executive block, supply department and office block except for the first floor, where an additional camera is placed at the door of the network control room. This is because all the server and mainframe is in this room and it requires a higher security. All CCTV cameras are connected using BNC coaxial cable. Each workshops and warehouses will have an additional of 1 camera. This makes up to 2 cameras in each workshops and warehouses.
CCTV Wall mounted cameras.
It normally mounted just out of reach of an individual, but accessible by two people working together. Mostly protecting private property, but often also covering public space. In that case, some Hidden CCTV cameras should be installed as well in workshops or warehouses for stock security reasons. They can operate as a back-up where primary cameras are disabled by an intruder. Used mostly for temporary installations to catch repetitive criminal activity. They are also useful for back-up surveillance in installations where the primary CCTV equipment is of a more traditional nature.
d) Interconnectivity of networks
Hubs
The hubs that I am going to use in the whole network design are 3Com® SuperStack® II Dual Speed Hub 500 24-ports and 12-ports. Hubs are very simple devices that pass all traffic in both directions between the LAN, even those that do not need to go there. They may connect different types of cables, but use the same data link and network protocol.
Network Interface Card (NIC)
The Ethernet card used in this proposed network is 10/100Mbps cards. With this card, a node can operate at either 10 or 100 Mbps depending on the speed of the other node but in my design, all the node will operate at 100 Mbps. Gigabit Ethernet: Fibre- or copper-compatible network interface cards with a variety of management and performance features, for server and desktop PCs. Fast Ethernet: Fibre- or copper-compatible network interface cards with a variety of security, management, server, and performance features, for server and desktop PCs.
Servers
The server that I’m going to use is the application server, http sever file server and print server.
Application server, the industry's first middle-tier software designed for grid computing, it has full support for J2EE, enterprise portal software, high-speed caching, business intelligence, rapid application development, application and business integration, wireless capabilities, Web services and more. These features are pre-integrated in a single product to save you time and money. HTTP server, which provides Internet and Intranet access to all the staff connected to the network and the file server used to store all the data and information. Files sever: hardware and software that together provide file-handling and storage functions for multiple users on a . Print server: a device that is set up on a to route print requests and status information between computers and connected by a network. A typical print server routes print requests for multiple computers and printers on a network.
All these servers are placed in the network control room in the office block. The reason why I use 3 different server instead of 1 multifunction server is that, if any of the servers breakdown, it won’t affect the work perform by the other server.
Monitoring Unit
A monitoring unit is a PC that acts as a network administrator in a network room. The purpose of this monitoring unit is used to provide a better network management and higher security.
Front End Processor (FEP)
FEP is the MVME 147S, a VME bus compatible single board computer by Motorola. Interface features allow the attachment of a disk controller, Ethernet link to CDAQ, and serial links to the above readout modules without needing additional VME bus modules. The addition of both, hard and floppy disks, gives standalone development and operation ability
e) Outside connection
I plan to use Fibre Distributed Data Interchange (FDDI) as the backbone of my design. All small LAN formed in block, department and office will be connected to FDDI by UTP CAT 5, leased line and fiber optic which described before.
f) Protocols / Software
Protocol
TCP/IP (Transmission Control Protocol/ Internet Protocol): This protocol is used to communicate with all the hardware that is attached to the network.
TCP/IP is composed of layers:
- IP - is responsible for moving packet of data from node to node. IP forwards each packet based on a four byte destination address (the IP number).
- TCP - is responsible for verifying the correct delivery of data from client to server. Data can be lost in the intermediate network. TCP adds support to detect errors or lost data and to trigger retransmission until the data is correctly and completely received.
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Sockets - is a name given to the package of subroutines that provide access to TCP/IP on most systems
UDP (User Datagram Protocol): This protocol provides the basic transmission like TCP/IP does. But I still use this protocol because there is some applications are inappropriate to use TCP/IP.
SMTP (Simple Mail Transfer Protocol): This protocol is used to support electronic mail. Besides that, server to server transmission also uses this protocol.
SNMP (Simple Network Management Protocol): This protocol is used to ensure the network availability and reliability.
PAP (Password Authentication Protocol). This protocol is used to provide unauthorised users to access to network and some of the important terminal.
Software
As for the software, anti-virus and firewall softwares will be installed to prevent viruses and unauthorized access from infecting the PCs and servers.
Network Operating System
I use Windows XP professional as network operating system. It is designed for businesses of all sizes and for home users who demand the most from their computing experience, Windows XP Professional delivers the new standard in reliability and performance. It plus premier security and privacy features, advanced recovery options, improved ability to connect to large networks, and much more, as the network operating system.
Summary
All kinds of computer users, especially the business companies want to use internet tool to improve their operations and business (do things better, faster, cheaper), increase the number of trade-friends they want to make, increase their revenue by attracting new customers, or improve the relationship with their existing clients. The A.A builder company is no exception. It wants to upgrade its current network to catch up with the present age’s heated competitive business world.
In order to upgrade and improve the network, first of all, the current system should be analysed. I call it present scenario analysis. After detailed analysing of current system, many drawbacks of the current network are found. In that case, a requirement is outlined to make up for these disadvantages. Then a proposed network is ready to be designed.
The office block, supply department, warehouse and workshop are connected to the FDDI ring using 100 Bass of Fast Ethernet. A fiber optic line is dedicated to both of executive block and design office for faster data transfer. Moreover, within design office, office block, executive block, warehouses and workshops and supply department, a star topology is used to connect all PCs and printers together. Each block such as office block, executive block, supply department, design office, warehouses and workshops as well as the subsidiary firm has its own local area network (LAN). They are then connected together to form a Wide Area Network (WAN).
Unshielded twisted pair (UTP) Cat 5 cable and multi-mode fibre optic cable are used through the new network. UTP Cat 5 cable is constructed using eight 24 AWG insulated conductors (four pairs), enclosed by a thermoplastic jacket. Each of the four conductor pairs is twisted together at a slightly balanced high-speed communications circuit and to reject electrical interference or "noise" from sources such as power wiring, fluorescent and HID ballasts, and motors. It is a good choice for most networked environment because of its low cost, lack of rigidity, easy to install and excellent transmission quality.
T1 leased line is used to connect with the 10 subsidiaries as it is cheaper over a constant amount of usage. It is suitability used in LAN-LAN communications where large bandwidth is a necessity
Windows XP professional is chosen as the network operating system as it is very suitable to the proposed company network design. Besides, it delivers the new standard in reliability and performance. It plus premier security and privacy features, advanced recovery options, improved ability to connect to large networks, and much more, as the network operating system.
Future Proposition
Now the proposed new design has been done with careful considerations to satisfy any future needs and demands for A.A Builder Company. In my point of view, according to the current economy situation, the new network system can be used for at least 5 years. This means that the proposed network design can be used for around this duration of time without any upgrading.
With the development of the A.A. Builder Company, it will increase number of staffs. In that case, high bandwidth of sharing sources and data transfer are highly required. But it is not a problem. The proposed new design is operated on 100Mbps of Fast Ethernet and it can support future expandability very well. If necessary, Fast Ethernet is still very easy to upgrade to the much faster Gigabit Ethernet that allows 1000Mbps. This is probably due to more multimedia applications such as video conferencing or audio transmission.
As it mentioned in the earlier section, new devices or PCs can be easily added to the network by using star topology. This can be done by just connecting the new devices or PCs into the available ports on the hubs. The hubs used in the proposed network design are all stackable, thus new hubs can be added when the capacity of the existing hub has exceeded. Besides, if the company want to have a new building within the main site, it just connect the new building to the network as the FDDI topology which is being used in the proposed new network.
Finally, it would not be a problem if the company would add more subsidiaries firms in future. The sub line can be easily added to T1 leased line.
Conclusion
All in all, the proposed new network I designed has almost met all the current needs and demands of the company. In addition, this new network design has also provided a good scalability and space for future expansion. Sharing of resources either hardware or software and inter-communication between the company will be much easier and faster than before after using the new network. The data centre control will became easier and more reliable than before. Furthermore, the security condition will become much better as well after using CCTV cameras operation. Then, it is possible to relieve the stress of the staff and this will increase their productivity which can profile the company.
Personally speaking, this network design for a company is really a great experience even to treasure for me in my life. Now, the main task of mine is to try my best to make use of this experience into practice to contribute to my motherland. In order to complete above task I‘ll try to “upgrade” myself just like the development of the network in future.
References
Books:
Local Area Network Third Edition by David A. Stamper
A Guide to Designing and Implementing LAN and WAN
Internet addresses:
